426 lines
21 KiB
JSON
426 lines
21 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-49948",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-06-18T10:57:27.382Z",
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"datePublished": "2025-06-18T11:00:12.364Z",
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"dateUpdated": "2026-10-15T21:31:17.598Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:56:50.380Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvt: Clear selection before changing the font\n\nWhen changing the console font with ioctl(KDFONTOP) the new font size\ncan be bigger than the previous font. A previous selection may thus now\nbe outside of the new screen size and thus trigger out-of-bounds\naccesses to graphics memory if the selection is removed in\nvc_do_resize().\n\nPrevent such out-of-memory accesses by dropping the selection before the\nvarious con_font_set() console handlers are called."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - Exploitation requires local ioctl access to a virtual terminal device (KDFONTOP and TIOCLINUX), not network or adjacent-network reachability.\nAC:L - The attacker fully controls both prerequisites—setting a console selection and changing the font to a larger size—so the out-of-bounds write in imageblit can be triggered reliably without depending on external conditions.\nPR:L - KDFONTOP SET and TIOCL_SETSEL are permitted to the unprivileged owner of the controlling VT (current->signal->tty == tty); CAP_SYS_TTY_CONFIG/CAP_SYS_ADMIN are not required, matching other VT/fbcon scores.\nUI:N - The attacker performs the ioctls directly on their own VT session; no separate victim action is required.\nS:U - Impact is confined to the host kernel authority (memory corruption / DoS); there is no VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:H - The bug is a confirmed out-of-bounds write (stack and vmalloc) via imageblit; per kernel CVSS guidance, such memory corruption can be leveraged for arbitrary disclosure primitives.\nI:H - Out-of-bounds writes past the framebuffer and into stack/adjacent memory enable corruption exploitable for control-flow hijacking, consistent with similar fast_imageblit/fbcon OOB-write CVEs.\nA:H - Triggering the path causes kernel KASAN reports and oopses (vmalloc/stack out-of-bounds in imageblit), which is a High availability impact."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/tty/vt/vt.c"
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],
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"versions": [
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{
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"version": "009e39ae44f4191188aeb6dfbf661b771dbbe515",
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"lessThan": "c555cf04684fde39b5b0dd9fd80730030ee10c4a",
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"status": "affected",
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"version": "009e39ae44f4191188aeb6dfbf661b771dbbe515",
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"status": "affected",
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"lessThan": "1cf1930369c9dc428d827b60260c53271bff3285",
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"version": "009e39ae44f4191188aeb6dfbf661b771dbbe515",
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"version": "009e39ae44f4191188aeb6dfbf661b771dbbe515",
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"status": "affected",
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},
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{
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"version": "e60f8fcce05042e8f8cea25ee81fecc1222114cf",
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"status": "affected",
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},
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{
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"version": "5812a9bc9d68a82c2cc839f88e6f7a05093ab39d",
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"status": "affected",
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"version": "863ad19fd654c485e3beec3575c4d74a1e74369e",
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"status": "affected",
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},
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{
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"version": "dbc3fd44f957a39407e889287bf61fa0ef3ecc14",
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},
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{
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"version": "0b2a0a58ad22f9d6dfc641bc5ec46057493f22a5",
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"status": "affected",
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},
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{
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"version": "9f2d48f0745f921040df91bfe8fa7f0339cd7497",
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"status": "affected",
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},
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{
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"version": "3425e397fb23cc2e8e6fb8f5b8226dcb447e84dd",
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"status": "affected",
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{
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"version": "eeae0a12a16650ff494d5faefa371cd9e7079575",
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"status": "affected",
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},
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{
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"version": "3.2.85",
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"lessThan": "3.3",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "3.10.105",
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"lessThan": "3.11",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "3.12.68",
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"lessThan": "3.13",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "3.16.40",
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"lessThan": "3.17",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "3.18.45",
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"lessThan": "3.19",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.1.36",
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"lessThan": "4.2",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.4.31",
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"lessThan": "4.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.8.7",
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"lessThan": "4.9",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/tty/vt/vt.c"
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],
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{
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"version": "4.9",
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"status": "affected"
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},
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{
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"version": "0",
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"status": "unaffected",
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},
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{
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"version": "4.9.328",
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"lessThanOrEqual": "4.9.*",
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},
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{
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"lessThanOrEqual": "4.14.*",
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"status": "unaffected",
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},
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{
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"version": "4.19.258",
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"lessThanOrEqual": "4.19.*",
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"status": "unaffected",
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},
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{
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"version": "5.4.213",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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},
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{
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"version": "5.10.142",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.66",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.19.8",
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"lessThanOrEqual": "5.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.0",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "4.9.328"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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"versionStartIncluding": "4.9",
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},
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"versionStartIncluding": "4.9",
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},
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},
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{
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"vulnerable": true,
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"versionStartIncluding": "3.10.105"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.12.68"
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},
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{
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},
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{
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"vulnerable": true,
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{
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.4.31"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.8.7"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e"
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},
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{
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"url": "https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e"
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},
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{
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"url": "https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285"
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},
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{
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"url": "https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb"
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},
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{
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"url": "https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db"
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},
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{
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"url": "https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc"
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},
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{
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"url": "https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f"
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}
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],
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"title": "vt: Clear selection before changing the font",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-49948",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:29:48.514469Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T21:31:17.598Z"
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}
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}
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]
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}
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} |