269 lines
14 KiB
JSON
269 lines
14 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-2024-49925",
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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": "2024-10-21T12:17:06.036Z",
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"datePublished": "2024-10-21T18:01:49.732Z",
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"dateUpdated": "2026-08-05T11:40:28.960Z"
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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": "2026-08-05T11:40:28.960Z"
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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\nfbdev: efifb: Register sysfs groups through driver core\n\nThe driver core can register and cleanup sysfs groups already.\nMake use of that functionality to simplify the error handling and\ncleanup.\n\nAlso avoid a UAF race during unregistering where the sysctl attributes\nwere usable after the info struct was freed."
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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:N/A:H",
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"baseScore": 7.1,
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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 - The vulnerable code is reached only by reading sysfs files under /sys/devices/platform/efi-framebuffer.0/ from a local process; there is no network, adjacent-network, or remote-peer path into efifb's attribute show handlers.\nAC:L - Exploitation requires the system to be in the narrow state of tearing down the efifb platform driver — a state only root can induce (driver unbind, or a DRM driver load calling aperture_remove_conflicting_devices()) — and the window between unregister_framebuffer() and sysfs_remove_groups() is a handful of instructions. The attacker controls only the reader side of the race and cannot trigger, widen, or retry the free.\nPR:L - The attributes are DEVICE_ATTR_RO (mode 0444), so any unprivileged local user, including one inside a container with /sys mounted, can read them in a tight loop with no capability at all.\nUI:N - The driver-removal event that opens the window is an automatic boot-time DRM handoff on typical systems rather than a deliberate victim action, and the attacker's own read requires no interaction from anyone else.\nS:U - The stale attribute access and the freed struct fb_info both live in the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - A successful read in the window dereferences the freed struct fb_info allocation, and because the read is repeatable and the attacker can spray the slab between attempts to control what lands in the freed slot, it acts as a kernel-heap disclosure oracle rather than a single bounded leak.\nI:N - Every attribute in efifb_groups is DEVICE_ATTR_RO with no store() method, so the code path performs only loads — there is no out-of-bounds write, no write into the freed object, and no way to alter kernel memory or control flow.\nA:H - Touching the freed fb_info can fault and oops when the backing page has been returned to the allocator or on hardened builds (KASAN/KFENCE/DEBUG_PAGEALLOC), and any such fault in the fbdev teardown path takes down the kernel."
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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/video/fbdev/efifb.c"
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],
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"versions": [
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{
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"version": "753375a881caa01112b7cec2c796749154e0bb23",
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"lessThan": "2d97b85eb5a86766ad0f8ea3d121e6ae144e3ed8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "2a9c40c72097b583b23aeb2a26d429ccfc81fbc1",
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"status": "affected",
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"status": "affected",
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},
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{
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"lessThan": "4684d69b9670a83992189f6271dc0fcdec4ed0d7",
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"status": "affected",
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"versionType": "git"
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"lessThan": "95cdd538e0e5677efbdf8aade04ec098ab98f457",
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"status": "affected",
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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/video/fbdev/efifb.c"
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],
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"versions": [
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{
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"version": "4.10",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.10",
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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": "5.15.209",
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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": "6.1.120",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.55",
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"lessThanOrEqual": "6.6.*",
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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": "6.10.14",
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"lessThanOrEqual": "6.10.*",
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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": "6.11.3",
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"lessThanOrEqual": "6.11.*",
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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": "6.12",
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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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"nodes": [
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"operator": "OR",
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.10",
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"versionEndExcluding": "5.15.209"
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"references": [
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"url": "https://git.kernel.org/stable/c/2d97b85eb5a86766ad0f8ea3d121e6ae144e3ed8"
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},
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"url": "https://git.kernel.org/stable/c/2a9c40c72097b583b23aeb2a26d429ccfc81fbc1"
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"url": "https://git.kernel.org/stable/c/872cd2d029d2c970a8a1eea88b48dab2b3f2e93a"
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{
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"url": "https://git.kernel.org/stable/c/4684d69b9670a83992189f6271dc0fcdec4ed0d7"
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{
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"url": "https://git.kernel.org/stable/c/95cdd538e0e5677efbdf8aade04ec098ab98f457"
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}
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],
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"title": "fbdev: efifb: Register sysfs groups through driver core",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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-2024-49925",
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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": "partial"
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"version": "2.0.3",
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"timestamp": "2024-10-22T13:39:49.983687Z"
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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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"shortName": "CISA-ADP",
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"dateUpdated": "2024-10-22T13:48:44.061Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
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