CVE-2026-53272

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Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi->sync_decompress.\n\nThread (unmount) I/O completion kworker\n queue_work\n z_erofs_decompressqueue_work\n (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n erofs_sb_free\n kfree(sbi)\n access sbi->sync_decompress // UAF!!"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/erofs/zdata.c"], "versions": [{"version": "40452ffca3c1a0f2994e826f9fa213b107f1a2d4", "lessThan": "5627e57f1da68ff0146896eb3d2eed25e62adc44", "status": "affected", "versionType": "git"}, {"version": "40452ffca3c1a0f2994e826f9fa213b107f1a2d4", "lessThan": "59db5d8bcc65e04d8598afd81ec3a18edb407470", "status": "affected", "versionType": "git"}, {"version": "40452ffca3c1a0f2994e826f9fa213b107f1a2d4", "lessThan": "86ab00cf81d44b675bb23db62b88fd76c8ac8cea", "status": "affected", "versionType": "git"}, {"version": "40452ffca3c1a0f2994e826f9fa213b107f1a2d4", "lessThan": "00bf6868df65fa95b3854996246d15759fdc7070", "status": "affected", "versionType": "git"}, {"version": "40452ffca3c1a0f2994e826f9fa213b107f1a2d4", "lessThan": "95caf60da33d87ed26c28993620f0d92487b0296", "status": "affected", "versionType": "git"}, {"version": "40452ffca3c1a0f2994e826f9fa213b107f1a2d4", "lessThan": "1aee05e814d292064bf5fa15733741040cdc48ba", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/erofs/zdata.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.17", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5627e57f1da68ff0146896eb3d2eed25e62adc44"}, {"url": "https://git.kernel.org/stable/c/59db5d8bcc65e04d8598afd81ec3a18edb407470"}, {"url": "https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea"}, {"url": "https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070"}, {"url": "https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296"}, {"url": "https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba"}], "title": "erofs: fix use-after-free on sbi->sync_decompress", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-53272", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:24:43.803566Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:34:16.904Z"}}]}}

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Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi->sync_decompress.\n\nThread (unmount) I/O completion kworker\n queue_work\n z_erofs_decompressqueue_work\n (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n erofs_sb_free\n kfree(sbi)\n access sbi->sync_decompress // UAF!!"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "5.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.160", "versionStartIncluding": "5.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.94", "versionStartIncluding": "5.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.36", "versionStartIncluding": "5.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.13", "versionStartIncluding": "5.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "5.17"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:26:53.648Z"}}}, "cveMetadata": {"cveId": "CVE-2026-53272", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:34:16.904Z", "dateReserved": "2026-06-09T07:44:35.395Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-06-25T08:39:57.147Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi->sync_decompress.\n\nThread (unmount) I/O completion kworker\n queue_work\n z_erofs_decompressqueue_work\n (all folios are unlocked)\ncleanup_mnt\n ..\n erofs_kill_sb\n erofs_sb_free\n kfree(sbi)\n access sbi->sync_decompress // UAF!!"}], "id": "CVE-2026-53272", "lastModified": "2026-11-06T17:18:17.623", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53272", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:24:43.803566Z", "version": "2.0.3"}}]}, "published": "2026-06-25T09:16:45.353", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/00bf6868df65fa95b3854996246d15759fdc7070"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5627e57f1da68ff0146896eb3d2eed25e62adc44"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/59db5d8bcc65e04d8598afd81ec3a18edb407470"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8cea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: erofs: fix use-after-free on sbi->sync_decompress", "id": "2492855", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492855"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nerofs: fix use-after-free on sbi->sync_decompress\nz_erofs_decompress_kickoff() can race with filesystem unmount, causing\na use-after-free on sbi->sync_decompress.\nWhen I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()\nto queue z_erofs_decompressqueue_work() asynchronously. Then, after all\nfolios are unlocked, unmount workflow can proceed and sbi will be freed\nbefore accessing to sbi->sync_decompress.\nThread (unmount) I/O completion kworker\nqueue_work\nz_erofs_decompressqueue_work\n(all folios are unlocked)\ncleanup_mnt\n..\nerofs_kill_sb\nerofs_sb_free\nkfree(sbi)\naccess sbi->sync_decompress // UAF!!"], "name": "CVE-2026-53272", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53272\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53272\nhttps://lore.kernel.org/linux-cve-announce/2026062518-CVE-2026-53272-9faa@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40452ffca3c1a0f2994e826f9fa213b107f1a2d4,86ab00cf81d44b675bb23db62b88fd76c8ac8cea)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40452ffca3c1a0f2994e826f9fa213b107f1a2d4,00bf6868df65fa95b3854996246d15759fdc7070)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40452ffca3c1a0f2994e826f9fa213b107f1a2d4,95caf60da33d87ed26c28993620f0d92487b0296)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[40452ffca3c1a0f2994e826f9fa213b107f1a2d4,1aee05e814d292064bf5fa15733741040cdc48ba)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.94,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.36,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0.13,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-25T11:45:03.800983+00:00", "updated": "2026-08-13T18:30:16.259994+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}