{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53393","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.402Z","datePublished":"2026-07-19T12:01:56.684Z","dateUpdated":"2026-08-17T04:50:44.847Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T04:50:44.847Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: reset write verifier on deferred writeback errors\n\nnfsd_vfs_write() and nfsd_commit() both call filemap_check_wb_err() to\ndetect deferred writeback errors, but neither rotates the server's write\nverifier (nn->writeverf) when this check fails. Every other\ndurable-storage-failure path in these functions calls\ncommit_reset_write_verifier() before returning an error.\n\nThe missing rotation means clients holding UNSTABLE write data under the\ncurrent verifier will COMMIT, receive the unchanged verifier back, and\nconclude their data is durable — silently dropping data that failed\nwriteback. This violates the UNSTABLE+COMMIT durability contract\n(RFC 1813 §3.3.7, RFC 8881 §18.32).\n\nAdd commit_reset_write_verifier() calls at both filemap_check_wb_err()\nerror sites, matching the pattern used by adjacent error paths in the\nsame functions. The helper already filters -EAGAIN and -ESTALE\ninternally, so the calls are unconditionally safe."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/vfs.c"],"versions":[{"version":"f14816f2f928c560d28ba344af689f56efcd6f55","lessThan":"b8e5894e56cff70fa245628fe16f0ad6367f8090","status":"affected","versionType":"git"},{"version":"3145fe0ebb16e1715ad541a301bc6675c8375fcd","lessThan":"bc2baca02ec56da7707a74ed5d340b0a1dff1841","status":"affected","versionType":"git"},{"version":"555dbf1a9aac6d3150c8b52fa35f768a692f4eeb","lessThan":"43b65d2997963e80e8d8d86520bcb1e0751227de","status":"affected","versionType":"git"},{"version":"555dbf1a9aac6d3150c8b52fa35f768a692f4eeb","lessThan":"666e837b247fcadf2d8d508b9b0e49d720393eb4","status":"affected","versionType":"git"},{"version":"555dbf1a9aac6d3150c8b52fa35f768a692f4eeb","lessThan":"1dd664b39774a9c89b72de8e59bf9ef4b3aaff2e","status":"affected","versionType":"git"},{"version":"555dbf1a9aac6d3150c8b52fa35f768a692f4eeb","lessThan":"4367afc119c51e17a616f6908772b7e2c2c4013f","status":"affected","versionType":"git"},{"version":"555dbf1a9aac6d3150c8b52fa35f768a692f4eeb","lessThan":"b027cca33c97354149fcc0ddeede4525c41093cd","status":"affected","versionType":"git"},{"version":"555dbf1a9aac6d3150c8b52fa35f768a692f4eeb","lessThan":"2090b05803faab8a9fa62fbff871007862cac1b7","status":"affected","versionType":"git"},{"version":"5.10.124","lessThan":"5.10.261","status":"affected","versionType":"semver"},{"version":"5.15.49","lessThan":"5.15.212","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/vfs.c"],"versions":[{"version":"5.17","status":"affected"},{"version":"0","lessThan":"5.17","status":"unaffected","versionType":"semver"},{"version":"5.10.261","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.212","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.95","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.38","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.3","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"5.10.124","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.49","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.12.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.38"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.1.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b8e5894e56cff70fa245628fe16f0ad6367f8090"},{"url":"https://git.kernel.org/stable/c/bc2baca02ec56da7707a74ed5d340b0a1dff1841"},{"url":"https://git.kernel.org/stable/c/43b65d2997963e80e8d8d86520bcb1e0751227de"},{"url":"https://git.kernel.org/stable/c/666e837b247fcadf2d8d508b9b0e49d720393eb4"},{"url":"https://git.kernel.org/stable/c/1dd664b39774a9c89b72de8e59bf9ef4b3aaff2e"},{"url":"https://git.kernel.org/stable/c/4367afc119c51e17a616f6908772b7e2c2c4013f"},{"url":"https://git.kernel.org/stable/c/b027cca33c97354149fcc0ddeede4525c41093cd"},{"url":"https://git.kernel.org/stable/c/2090b05803faab8a9fa62fbff871007862cac1b7"}],"title":"nfsd: reset write verifier on deferred writeback errors","x_generator":{"engine":"bippy-1.2.0"}}}}