CVE-2026-53303

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53303", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.397Z", "datePublished": "2026-06-26T19:40:59.383Z", "dateUpdated": "2026-06-26T19:40:59.383Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-26T19:40:59.383Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()\n\nIn f2fs_sbi_show(), the extension_list, extension_count and\nhot_ext_count are read without holding sbi->sb_lock. If a concurrent\nsysfs store modifies the extension list via f2fs_update_extension_list(),\nthe show path may read inconsistent count and array contents, potentially\nleading to out-of-bounds access or displaying stale data.\n\nFix this by holding sb_lock around the entire extension list read\nand format operation."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/sysfs.c"], "versions": [{"version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "lessThan": "d3ff0c121bbaef026df6248ab7ef6f0b068b0647", "status": "affected", "versionType": "git"}, {"version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "lessThan": "cea15f66b7b68b2c50943a6660e0692c6635e4eb", "status": "affected", "versionType": "git"}, {"version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "lessThan": "4b3a1bf4c2ffd4c9595d900ead78c9035894a025", "status": "affected", "versionType": "git"}, {"version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "lessThan": "d0e877810baf613b018fd9747440b9d4d9db1428", "status": "affected", "versionType": "git"}, {"version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "lessThan": "ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e", "status": "affected", "versionType": "git"}, {"version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "lessThan": "5909bedbed38c558bee7cb6758ceedf9bc3a9194", "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/f2fs/sysfs.c"], "versions": [{"version": "4.17", "status": "affected"}, {"version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "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": "4.17", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.6.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.12.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647"}, {"url": "https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb"}, {"url": "https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025"}, {"url": "https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428"}, {"url": "https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e"}, {"url": "https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194"}], "title": "f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/f2fs/sysfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d3ff0c121bbaef026df6248ab7ef6f0b068b0647", "status": "affected", "version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "versionType": "git"}, {"lessThan": "cea15f66b7b68b2c50943a6660e0692c6635e4eb", "status": "affected", "version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "versionType": "git"}, {"lessThan": "4b3a1bf4c2ffd4c9595d900ead78c9035894a025", "status": "affected", "version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "versionType": "git"}, {"lessThan": "d0e877810baf613b018fd9747440b9d4d9db1428", "status": "affected", "version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "versionType": "git"}, {"lessThan": "ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e", "status": "affected", "version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "versionType": "git"}, {"lessThan": "5909bedbed38c558bee7cb6758ceedf9bc3a9194", "status": "affected", "version": "b6a06cbbb5f7fd03589cff9178314af04c568826", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/f2fs/sysfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.17"}, {"lessThan": "4.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.175", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.141", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.91", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.33", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8996861F-56AF-4491-ADB8-6980EE1EF12F", "versionEndExcluding": "6.1.175", "versionStartIncluding": "4.17", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "97A9FFFA-22BB-4D5C-9790-5A2286E392F7", "versionEndExcluding": "6.6.141", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C918746B-DE6F-448F-A93E-A04C5481688D", "versionEndExcluding": "6.12.91", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "96D99E49-380D-43AB-BDBA-25C3AD018A9C", "versionEndExcluding": "6.18.33", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A13475D2-59BF-4716-94B5-7C1D239A2CF4", "versionEndExcluding": "7.0.10", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()\n\nIn f2fs_sbi_show(), the extension_list, extension_count and\nhot_ext_count are read without holding sbi->sb_lock. If a concurrent\nsysfs store modifies the extension list via f2fs_update_extension_list(),\nthe show path may read inconsistent count and array contents, potentially\nleading to out-of-bounds access or displaying stale data.\n\nFix this by holding sb_lock around the entire extension list read\nand format operation."}], "id": "CVE-2026-53303", "lastModified": "2026-07-06T20:24:23.577", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-06-26T20:17:23.527", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()", "id": "2493763", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2493763"}, "csaw": false, "cwe": "CWE-366", "details": ["A flaw was found in the Linux kernel's f2fs filesystem. This vulnerability allows for potential out-of-bounds memory access or the display of stale data. It occurs because the `extension_list` and related counts are read without proper synchronization, enabling a concurrent system file system (sysfs) store operation to modify the list while it is being accessed. This inconsistency can lead to system instability or incorrect information being presented."], "name": "CVE-2026-53303", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "2026-06-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53303\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53303\nhttps://lore.kernel.org/linux-cve-announce/2026062619-CVE-2026-53303-adc7@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a06cbbb5f7fd03589cff9178314af04c568826,d3ff0c121bbaef026df6248ab7ef6f0b068b0647)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a06cbbb5f7fd03589cff9178314af04c568826,cea15f66b7b68b2c50943a6660e0692c6635e4eb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a06cbbb5f7fd03589cff9178314af04c568826,4b3a1bf4c2ffd4c9595d900ead78c9035894a025)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a06cbbb5f7fd03589cff9178314af04c568826,d0e877810baf613b018fd9747440b9d4d9db1428)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a06cbbb5f7fd03589cff9178314af04c568826,ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a06cbbb5f7fd03589cff9178314af04c568826,5909bedbed38c558bee7cb6758ceedf9bc3a9194)"}}], "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": "[4.17,4.17]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.175,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.141,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.91,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.33,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0.10,7.1.0)"}}, {"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": "2026-06-26T21:45:05.439969+00:00", "updated": "2026-08-12T09:15:02.836788+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}