{ "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": [ { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "fb791514acf9070225eed46e1ccbb0aa7aae5da5", "status": "affected", "versionType": "git" }, { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "0ec746674296c94137f074309c26d17e644c0498", "status": "affected", "versionType": "git" }, { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "1aea36a62f0a0ad67eccc945bac0bd6422ef720f", "status": "affected", "versionType": "git" }, { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "3b36c05f68ba32d0dfb63abc9016d6fe9117829f", "status": "affected", "versionType": "git" }, { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "b1c28577529cdfad40c8242673285f1e1e4c314e", "status": "affected", "versionType": "git" }, { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "eae90015d10f0c9a47fc4adccba4cd79dce664e4", "status": "affected", "versionType": "git" }, { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "aeb635b49530b7d19e140949753409f759ba99be", "status": "affected", "versionType": "git" }, { "version": "d7edf47947f9d921be6ca5fc8e83049124466f98", "lessThan": "809b8cde86320698661eec677222bc5c5df76176", "status": "affected", "versionType": "git" }, { "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" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "4.14.276" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "4.19.238" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "5.4.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "5.10.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "5.15.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "5.16.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "5.17.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.33", "versionEndExcluding": "5.18" } ] } ] } ], "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" } } } }