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vuln-cve/data/2022/49xxx/CVE-2022-49162.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2022-49162",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-02-26T01:49:39.277Z",
"datePublished": "2025-02-26T01:55:23.548Z",
"dateUpdated": "2026-08-05T08:54:09.104Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T08:54:09.104Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: sm712fb: Fix crash in smtcfb_write()\n\nWhen the sm712fb driver writes three bytes to the framebuffer, the\ndriver will crash:\n\n BUG: unable to handle page fault for address: ffffc90001ffffff\n RIP: 0010:smtcfb_write+0x454/0x5b0\n Call Trace:\n vfs_write+0x291/0xd60\n ? do_sys_openat2+0x27d/0x350\n ? __fget_light+0x54/0x340\n ksys_write+0xce/0x190\n do_syscall_64+0x43/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nFix it by removing the open-coded endianness fixup-code."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is reached only via write(2) on the local fbdev node (/dev/fbN) through vfs_write → fb_write → smtcfb_write; it is a PCI framebuffer driver with no network-facing path.\nAC:L - An attacker can reliably trigger the OOB write by writing a 1- or 3-byte payload at offset 0; no races or attacker-uncontrollable conditions are required.\nPR:L - fb_open/fb_write impose no capability checks—access is only DAC on /dev/fb*, typically granted to unprivileged video-group or console users on the embedded/kiosk systems that ship SM712/SM720 hardware.\nUI:N - The attacker opens the framebuffer device and writes the crafted payload themselves; no separate victim action is required.\nS:U - Impact stays within the host kernel/device authority (crash or MMIO corruption); there is no VM, IOMMU, or other security-boundary crossing.\nC:H - This is attacker-controlled out-of-bounds memory corruption; on SM720 screen_base sits 2MB into a shared ioremap with device registers, so the OOB poke hits mapped MMIO and is treatable as corruption that can be leveraged for disclosure.\nI:H - The broken endian remainder path does `--dst8` and fb_writeb() of attacker-controlled bytes before the intended destination—an explicit out-of-bounds write into either unmapped space or (on SM720) the mapped register aperture.\nA:H - The reported reproducer causes a kernel oops (page fault in smtcfb_write), which is a high availability impact; MMIO corruption can also hang or disable the display path."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/video/fbdev/sm712fb.c"
],
"versions": [
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"lessThan": "fb791514acf9070225eed46e1ccbb0aa7aae5da5",
"status": "affected",
"versionType": "git"
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"status": "affected",
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{
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"lessThan": "1aea36a62f0a0ad67eccc945bac0bd6422ef720f",
"status": "affected",
"versionType": "git"
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{
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"status": "affected",
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},
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"status": "affected",
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"status": "affected",
"versionType": "git"
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{
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"status": "affected",
"versionType": "git"
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{
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"lessThan": "809b8cde86320698661eec677222bc5c5df76176",
"status": "affected",
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},
{
"version": "d7edf47947f9d921be6ca5fc8e83049124466f98",
"lessThan": "4f01d09b2bbfbcb47b3eb305560a7f4857a32260",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/video/fbdev/sm712fb.c"
],
"versions": [
{
"version": "2.6.33",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.33",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.9.311",
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.14.276",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.238",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.189",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.110",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.33",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.16.19",
"lessThanOrEqual": "5.16.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.17.2",
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.18",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.33",
"versionEndExcluding": "4.9.311"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.33",
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},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "5.17.2"
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"versionStartIncluding": "2.6.33",
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}
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/fb791514acf9070225eed46e1ccbb0aa7aae5da5"
},
{
"url": "https://git.kernel.org/stable/c/0ec746674296c94137f074309c26d17e644c0498"
},
{
"url": "https://git.kernel.org/stable/c/1aea36a62f0a0ad67eccc945bac0bd6422ef720f"
},
{
"url": "https://git.kernel.org/stable/c/3b36c05f68ba32d0dfb63abc9016d6fe9117829f"
},
{
"url": "https://git.kernel.org/stable/c/b1c28577529cdfad40c8242673285f1e1e4c314e"
},
{
"url": "https://git.kernel.org/stable/c/eae90015d10f0c9a47fc4adccba4cd79dce664e4"
},
{
"url": "https://git.kernel.org/stable/c/aeb635b49530b7d19e140949753409f759ba99be"
},
{
"url": "https://git.kernel.org/stable/c/809b8cde86320698661eec677222bc5c5df76176"
},
{
"url": "https://git.kernel.org/stable/c/4f01d09b2bbfbcb47b3eb305560a7f4857a32260"
}
],
"title": "video: fbdev: sm712fb: Fix crash in smtcfb_write()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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