204 lines
11 KiB
JSON
204 lines
11 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-2022-49070",
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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": "2025-02-26T01:49:39.244Z",
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"datePublished": "2025-02-26T01:54:36.360Z",
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"dateUpdated": "2026-05-11T18:52:26.824Z"
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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": "2026-05-11T18:52:26.824Z"
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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: Fix unregistering of framebuffers without device\n\nOF framebuffers do not have an underlying device in the Linux\ndevice hierarchy. Do a regular unregister call instead of hot\nunplugging such a non-existing device. Fixes a NULL dereference.\nAn example error message on ppc64le is shown below.\n\n BUG: Kernel NULL pointer dereference on read at 0x00000060\n Faulting instruction address: 0xc00000000080dfa4\n Oops: Kernel access of bad area, sig: 11 [#1]\n LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries\n [...]\n CPU: 2 PID: 139 Comm: systemd-udevd Not tainted 5.17.0-ae085d7f9365 #1\n NIP: c00000000080dfa4 LR: c00000000080df9c CTR: c000000000797430\n REGS: c000000004132fe0 TRAP: 0300 Not tainted (5.17.0-ae085d7f9365)\n MSR: 8000000002009033 <SF,VEC,EE,ME,IR,DR,RI,LE> CR: 28228282 XER: 20000000\n CFAR: c00000000000c80c DAR: 0000000000000060 DSISR: 40000000 IRQMASK: 0\n GPR00: c00000000080df9c c000000004133280 c00000000169d200 0000000000000029\n GPR04: 00000000ffffefff c000000004132f90 c000000004132f88 0000000000000000\n GPR08: c0000000015658f8 c0000000015cd200 c0000000014f57d0 0000000048228283\n GPR12: 0000000000000000 c00000003fffe300 0000000020000000 0000000000000000\n GPR16: 0000000000000000 0000000113fc4a40 0000000000000005 0000000113fcfb80\n GPR20: 000001000f7283b0 0000000000000000 c000000000e4a588 c000000000e4a5b0\n GPR24: 0000000000000001 00000000000a0000 c008000000db0168 c0000000021f6ec0\n GPR28: c0000000016d65a8 c000000004b36460 0000000000000000 c0000000016d64b0\n NIP [c00000000080dfa4] do_remove_conflicting_framebuffers+0x184/0x1d0\n [c000000004133280] [c00000000080df9c] do_remove_conflicting_framebuffers+0x17c/0x1d0 (unreliable)\n [c000000004133350] [c00000000080e4d0] remove_conflicting_framebuffers+0x60/0x150\n [c0000000041333a0] [c00000000080e6f4] remove_conflicting_pci_framebuffers+0x134/0x1b0\n [c000000004133450] [c008000000e70438] drm_aperture_remove_conflicting_pci_framebuffers+0x90/0x100 [drm]\n [c000000004133490] [c008000000da0ce4] bochs_pci_probe+0x6c/0xa64 [bochs]\n [...]\n [c000000004133db0] [c00000000002aaa0] system_call_exception+0x170/0x2d0\n [c000000004133e10] [c00000000000c3cc] system_call_common+0xec/0x250\n\nThe bug [1] was introduced by commit 27599aacbaef (\"fbdev: Hot-unplug\nfirmware fb devices on forced removal\"). Most firmware framebuffers\nhave an underlying platform device, which can be hot-unplugged\nbefore loading the native graphics driver. OF framebuffers do not\n(yet) have that device. Fix the code by unregistering the framebuffer\nas before without a hot unplug.\n\nTested with 5.17 on qemu ppc64le emulation."
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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/core/fbmem.c"
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],
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"versions": [
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{
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"version": "c894ac44786cfed383a6c6b20c1bfb12eb96018a",
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"lessThan": "2388f826cdc9af2651991adc0feb79de9bdf2232",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9565a3b5203a4d57acbc1d0e981c6df71864b4ab",
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"lessThan": "de33df481545974ba47c46f05194e769e4307843",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "4d695d7c276f15adb1d2b64c584c3cf8f4f9e9ce",
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"lessThan": "feed87ff122b1640c221d4dd559442ab2cd50bb1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "27599aacbaefcbf2af7b06b0029459bbf682000d",
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"lessThan": "0f525289ff0ddeb380813bd81e0f9bdaaa1c9078",
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"status": "affected",
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"versionType": "git"
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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": "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/core/fbmem.c"
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],
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"versions": [
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{
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"version": "5.15.33",
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"lessThan": "5.15.34",
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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": "5.16.19",
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"lessThan": "5.16.20",
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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": "5.17.2",
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"lessThan": "5.17.3",
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"status": "affected",
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"versionType": "semver"
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}
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]
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}
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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": "5.15.33",
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"versionEndExcluding": "5.15.34"
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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": "5.16.19",
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"versionEndExcluding": "5.16.20"
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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": "5.17.2",
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"versionEndExcluding": "5.17.3"
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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/2388f826cdc9af2651991adc0feb79de9bdf2232"
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},
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{
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"url": "https://git.kernel.org/stable/c/de33df481545974ba47c46f05194e769e4307843"
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},
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{
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"url": "https://git.kernel.org/stable/c/feed87ff122b1640c221d4dd559442ab2cd50bb1"
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},
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{
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"url": "https://git.kernel.org/stable/c/0f525289ff0ddeb380813bd81e0f9bdaaa1c9078"
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}
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],
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"title": "fbdev: Fix unregistering of framebuffers without device",
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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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-2022-49070",
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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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}
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],
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"version": "2.0.3",
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"timestamp": "2025-10-01T19:49:37.472130Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-476",
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"description": "CWE-476 NULL Pointer Dereference"
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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": "2025-10-01T19:57:06.034Z"
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}
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}
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]
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}
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} |