{"id":"CVE-2026-52960","state":"PUBLISHED","title":"ceph: put folios not suitable for writeback","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nceph: put folios not suitable for writeback\n\nThe batch holds references to the folios (see `filemap_get_folios`,\n`folio_batch_release`), so we need to `folio_put` the folios we remove.\n\nTested on v6.18.","publishedAt":"2026-06-24T16:28:41.044Z","updatedAt":"2026-10-21T12:41:41.907Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce80b76dd32764cc914975777e058d4fae4f0ea0","status":"affected","lessThan":"349499a65b6b5fb6f66ba3673598ab558f48c544","versionType":"git"},{"version":"ce80b76dd32764cc914975777e058d4fae4f0ea0","status":"affected","lessThan":"86921e890fe1dea9791fb70bec552516fd47716a","versionType":"git"},{"version":"ce80b76dd32764cc914975777e058d4fae4f0ea0","status":"affected","lessThan":"544576f0f05c4a759806acddfaaeb686f14fb4b0","versionType":"git"},{"version":"0f2b2b7cacf888229cec19126e6791b11fb35f32","status":"affected","versionType":"git"},{"version":"6.12.114","status":"affected","lessThan":"6.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]}],"references":["https://git.kernel.org/stable/c/349499a65b6b5fb6f66ba3673598ab558f48c544","https://git.kernel.org/stable/c/86921e890fe1dea9791fb70bec552516fd47716a","https://git.kernel.org/stable/c/544576f0f05c4a759806acddfaaeb686f14fb4b0"],"weaknesses":["CWE-401"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52960.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52960","state":"PUBLISHED","datePublished":"2026-06-24T16:28:41.044Z","dateUpdated":"2026-10-21T12:41:41.907Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.373Z"},"containers":{"cna":{"title":"ceph: put folios not suitable for writeback","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nceph: put folios not suitable for writeback\n\nThe batch holds references to the folios (see `filemap_get_folios`,\n`folio_batch_release`), so we need to `folio_put` the folios we remove.\n\nTested on v6.18."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce80b76dd32764cc914975777e058d4fae4f0ea0","status":"affected","lessThan":"349499a65b6b5fb6f66ba3673598ab558f48c544","versionType":"git"},{"version":"ce80b76dd32764cc914975777e058d4fae4f0ea0","status":"affected","lessThan":"86921e890fe1dea9791fb70bec552516fd47716a","versionType":"git"},{"version":"ce80b76dd32764cc914975777e058d4fae4f0ea0","status":"affected","lessThan":"544576f0f05c4a759806acddfaaeb686f14fb4b0","versionType":"git"},{"version":"0f2b2b7cacf888229cec19126e6791b11fb35f32","status":"affected","versionType":"git"},{"version":"6.12.114","status":"affected","lessThan":"6.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/349499a65b6b5fb6f66ba3673598ab558f48c544"},{"url":"https://git.kernel.org/stable/c/86921e890fe1dea9791fb70bec552516fd47716a"},{"url":"https://git.kernel.org/stable/c/544576f0f05c4a759806acddfaaeb686f14fb4b0"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - Direct reachability is through CephFS file writeback, and a writable CephFS tree can reasonably be exposed through kernel network fileservers such as nfsd/ksmbd, which drive the same VFS writeback path remotely.\nAC:L - The bug is a deterministic missing folio_put() on skipped writeback folios; an attacker can repeatedly create/write/delete/sync files to accumulate leaked references without needing an uncontrollable race.\nPR:N - In the network-export scenario, the attacker needs no local privileges on the vulnerable host, and writable anonymous or guest-style exports are a reasonable high-severity deployment.\nUI:N - Once the CephFS mount/export exists, exploitation only requires attacker-driven writes and writeback triggers; no victim user action is needed.\nS:U - The impact remains within the vulnerable kernel host and does not cross a separate security authority such as a guest-to-host or IOMMU boundary.\nC:N - The flaw leaks folio references and pins page-cache memory; it does not provide an information disclosure or arbitrary read primitive.\nI:N - The flaw does not corrupt memory or allow unauthorized data modification; it only prevents selected folios from being released.\nA:H - Repeated triggering can leave folios permanently unreclaimable even after unmount/drop_caches, causing severe memory pressure, swapping, allocation failures, and potential system-wide DoS."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:41:41.907Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.114"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-52960","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical 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