{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47259","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-21T13:27:52.125Z","datePublished":"2024-05-21T14:19:52.738Z","dateUpdated":"2025-05-04T07:07:18.962Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:07:18.962Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: Fix use-after-free in nfs4_init_client()\n\nKASAN reports a use-after-free when attempting to mount two different\nexports through two different NICs that belong to the same server.\n\nOlga was able to hit this with kernels starting somewhere between 5.7\nand 5.10, but I traced the patch that introduced the clear_bit() call to\n4.13. So something must have changed in the refcounting of the clp\npointer to make this call to nfs_put_client() the very last one."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfs/nfs4client.c"],"versions":[{"version":"8dcbec6d20eb881ba368d0aebc3a8a678aebb1da","lessThan":"c7eab9e2d7b4e983ce280276fb920af649955897","status":"affected","versionType":"git"},{"version":"8dcbec6d20eb881ba368d0aebc3a8a678aebb1da","lessThan":"42c10b0db064e45f5c5ae7019bbf2168ffab766c","status":"affected","versionType":"git"},{"version":"8dcbec6d20eb881ba368d0aebc3a8a678aebb1da","lessThan":"3e3c7ebbfac152d08be75c92802a64a1f6471a15","status":"affected","versionType":"git"},{"version":"8dcbec6d20eb881ba368d0aebc3a8a678aebb1da","lessThan":"c3b6cf64dfe4ef96e7341508d50d6998da7062c7","status":"affected","versionType":"git"},{"version":"8dcbec6d20eb881ba368d0aebc3a8a678aebb1da","lessThan":"72651c6579a25317a90536181d311c663d0329ab","status":"affected","versionType":"git"},{"version":"8dcbec6d20eb881ba368d0aebc3a8a678aebb1da","lessThan":"476bdb04c501fc64bf3b8464ffddefc8dbe01577","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/nfs/nfs4client.c"],"versions":[{"version":"4.13","status":"affected"},{"version":"0","lessThan":"4.13","status":"unaffected","versionType":"semver"},{"version":"4.14.237","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.195","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.126","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.44","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.12.11","lessThanOrEqual":"5.12.*","status":"unaffected","versionType":"semver"},{"version":"5.13","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":"4.13","versionEndExcluding":"4.14.237"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"4.19.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.4.126"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.10.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.12.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897"},{"url":"https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c"},{"url":"https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15"},{"url":"https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7"},{"url":"https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab"},{"url":"https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577"}],"title":"NFS: Fix use-after-free in nfs4_init_client()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2021-47259","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2024-05-22T16:41:04.603993Z"}}}],"affected":[{"cpes":["cpe:2.3:o:linux:linux_kernel:4.13:*:*:*:*:*:*:*"],"vendor":"linux","product":"linux_kernel","versions":[{"status":"affected","version":"4.13"}],"defaultStatus":"unknown"},{"cpes":["cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"],"vendor":"linux","product":"linux_kernel","versions":[{"status":"affected","version":"8dcbec6d20eb","lessThan":"476bdb04c501","versionType":"custom"}],"defaultStatus":"unknown"}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-416","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:14:09.514Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:32:07.994Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/3e3c7ebbfac152d08be75c92802a64a1f6471a15","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577","tags":["x_transferred"]}]}]}}