{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49053", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.242Z", "datePublished": "2025-02-26T01:54:26.806Z", "dateUpdated": "2026-08-05T08:53:37.868Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:53:37.868Z" }, "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()." } ], "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/target/target_core_user.c" ], "versions": [ { "version": "141685a39151aea95eb56562d2953e919c6c73da", "lessThan": "d7c5d79e50be6e06b669141e3db1f977a0dd4e8e", "status": "affected", "versionType": "git" }, { "version": "141685a39151aea95eb56562d2953e919c6c73da", "lessThan": "e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed", "status": "affected", "versionType": "git" }, { "version": "141685a39151aea95eb56562d2953e919c6c73da", "lessThan": "fb7a5115422fbd6a4d505e8844f1ef5529f10489", "status": "affected", "versionType": "git" }, { "version": "141685a39151aea95eb56562d2953e919c6c73da", "lessThan": "aec36b98a1bbaa84bfd8299a306e4c12314af626", "status": "affected", "versionType": "git" }, { "version": "141685a39151aea95eb56562d2953e919c6c73da", "lessThan": "b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322", "status": "affected", "versionType": "git" }, { "version": "141685a39151aea95eb56562d2953e919c6c73da", "lessThan": "a9564d84ed9f6ee71017d062d0d2182154294a4b", "status": "affected", "versionType": "git" }, { "version": "141685a39151aea95eb56562d2953e919c6c73da", "lessThan": "a6968f7a367f128d120447360734344d5a3d5336", "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/target/target_core_user.c" ], "versions": [ { "version": "4.12", "status": "affected" }, { "version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.276", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.239", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.190", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.112", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.35", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.4", "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": "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" } ] } ] } ], "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" } ], "title": "scsi: target: tcmu: Fix possible page UAF", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "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": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:02:30.241Z" } } ] } }