{"api_version":"1","generated_at":"2026-07-14T18:03:02+00:00","cve":"CVE-2026-53303","urls":{"html":"https://cve.report/CVE-2026-53303","api":"https://cve.report/api/cve/CVE-2026-53303.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53303","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53303"},"summary":{"title":"f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-26 20:17:23","updated_at":"2026-07-06 20:24:23"},"problem_types":["CWE-125"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e","name":"https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025","name":"https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647","name":"https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428","name":"https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb","name":"https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194","name":"https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53303","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53303","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b6a06cbbb5f7fd03589cff9178314af04c568826 d3ff0c121bbaef026df6248ab7ef6f0b068b0647 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b6a06cbbb5f7fd03589cff9178314af04c568826 cea15f66b7b68b2c50943a6660e0692c6635e4eb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b6a06cbbb5f7fd03589cff9178314af04c568826 4b3a1bf4c2ffd4c9595d900ead78c9035894a025 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b6a06cbbb5f7fd03589cff9178314af04c568826 d0e877810baf613b018fd9747440b9d4d9db1428 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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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."}],"providerMetadata":{"dateUpdated":"2026-06-26T19:40:59.383Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53303","datePublished":"2026-06-26T19:40:59.383Z","dateReserved":"2026-06-09T07:44:35.397Z","dateUpdated":"2026-06-26T19:40:59.383Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-26 20:17:23","lastModifiedDate":"2026-07-06 20:24:23","problem_types":["CWE-125"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.175","matchCriteriaId":"8996861F-56AF-4491-ADB8-6980EE1EF12F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.141","matchCriteriaId":"97A9FFFA-22BB-4D5C-9790-5A2286E392F7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.91","matchCriteriaId":"C918746B-DE6F-448F-A93E-A04C5481688D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.33","matchCriteriaId":"96D99E49-380D-43AB-BDBA-25C3AD018A9C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0.10","matchCriteriaId":"A13475D2-59BF-4716-94B5-7C1D239A2CF4"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53303","Ordinal":"1","Title":"f2fs: protect extension_list reading with sb_lock in f2fs_sbi_sh","CVE":"CVE-2026-53303","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53303","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"f2fs: protect extension_list reading with sb_lock in f2fs_sbi_sh"}]}}}