{"id":"CVE-2022-49053","state":"PUBLISHED","title":"scsi: target: tcmu: Fix possible page UAF","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: tcmu: Fix possible page UAF\n\ntcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not\ntake refcount properly and just returns page pointer. When\ntcmu_try_get_data_page() returns, the returned page may have been freed by\ntcmu_blocks_release().\n\nWe need to get_page() under cmdr_lock to avoid concurrent\ntcmu_blocks_release().","publishedAt":"2025-02-26T01:54:26.806Z","updatedAt":"2026-08-05T08:53:37.868Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"d7c5d79e50be6e06b669141e3db1f977a0dd4e8e","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"fb7a5115422fbd6a4d505e8844f1ef5529f10489","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"aec36b98a1bbaa84bfd8299a306e4c12314af626","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"a9564d84ed9f6ee71017d062d0d2182154294a4b","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"a6968f7a367f128d120447360734344d5a3d5336","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/target/target_core_user.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.14.276","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.239","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.190","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.112","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.35","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.4","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/target/target_core_user.c"]}],"references":["https://git.kernel.org/stable/c/d7c5d79e50be6e06b669141e3db1f977a0dd4e8e","https://git.kernel.org/stable/c/e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed","https://git.kernel.org/stable/c/fb7a5115422fbd6a4d505e8844f1ef5529f10489","https://git.kernel.org/stable/c/aec36b98a1bbaa84bfd8299a306e4c12314af626","https://git.kernel.org/stable/c/b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322","https://git.kernel.org/stable/c/a9564d84ed9f6ee71017d062d0d2182154294a4b","https://git.kernel.org/stable/c/a6968f7a367f128d120447360734344d5a3d5336"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49053.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49053","state":"PUBLISHED","datePublished":"2025-02-26T01:54:26.806Z","dateUpdated":"2026-08-05T08:53:37.868Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T01:49:39.242Z"},"containers":{"cna":{"title":"scsi: target: tcmu: Fix possible page UAF","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: tcmu: Fix possible page UAF\n\ntcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not\ntake refcount properly and just returns page pointer. When\ntcmu_try_get_data_page() returns, the returned page may have been freed by\ntcmu_blocks_release().\n\nWe need to get_page() under cmdr_lock to avoid concurrent\ntcmu_blocks_release()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"d7c5d79e50be6e06b669141e3db1f977a0dd4e8e","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"fb7a5115422fbd6a4d505e8844f1ef5529f10489","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"aec36b98a1bbaa84bfd8299a306e4c12314af626","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"a9564d84ed9f6ee71017d062d0d2182154294a4b","versionType":"git"},{"version":"141685a39151aea95eb56562d2953e919c6c73da","status":"affected","lessThan":"a6968f7a367f128d120447360734344d5a3d5336","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/target/target_core_user.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.14.276","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.239","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.190","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.112","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.35","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.4","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/target/target_core_user.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d7c5d79e50be6e06b669141e3db1f977a0dd4e8e"},{"url":"https://git.kernel.org/stable/c/e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed"},{"url":"https://git.kernel.org/stable/c/fb7a5115422fbd6a4d505e8844f1ef5529f10489"},{"url":"https://git.kernel.org/stable/c/aec36b98a1bbaa84bfd8299a306e4c12314af626"},{"url":"https://git.kernel.org/stable/c/b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322"},{"url":"https://git.kernel.org/stable/c/a9564d84ed9f6ee71017d062d0d2182154294a4b"},{"url":"https://git.kernel.org/stable/c/a6968f7a367f128d120447360734344d5a3d5336"}],"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 UAF is triggered in tcmu_vma_fault() when a local process faults on the mmap'd TCMU UIO device (/dev/uioX); network I/O can only drive reclaim, not the use side.\nAC:L - A malicious TCMU handler controls page faults on the mmap and can drive command completion/allocation patterns that schedule tcmu_blocks_release(), so both sides of the race are attacker-influenced and retryable.\nPR:L - Exploitation requires opening/mmap'ing an existing TCMU UIO device and acting as (or replacing) the userspace handler; TCMU’s design assumes a malicious handler and no capability check exists on the fault path beyond ordinary local device access.\nUI:N - No separate victim action is required; the attacker triggers faults and reclaim themselves once they have the mapped TCMU device.\nS:U - Impact is confined to the local kernel/host authority (memory corruption/privilege escalation); this is not a VM/IOMMU/sandbox boundary escape.\nC:H - Page UAF in the fault path can map a freed and reallocated page into userspace, enabling arbitrary kernel/user memory disclosure.\nI:H - The same UAF/page remap primitive enables heap spraying and arbitrary writes/control-flow hijacking in the kernel.\nA:H - Use-after-free of a page during fault handling can cause kernel oops/panic even without a full exploit."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T08:53:37.868Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.14.276"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.19.239"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.190"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.17.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49053","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-02-27T17:59:25.641949Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","type":"CWE","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-02-27T18:02:30.241Z"}}]}}}