{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-52909","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-08-21T06:07:11.015Z","datePublished":"2024-08-21T06:10:50.303Z","dateUpdated":"2025-05-04T07:45:49.273Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:45:49.273Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix handling of cached open files in nfsd4_open codepath\n\nCommit fb70bf124b05 (\"NFSD: Instantiate a struct file when creating a\nregular NFSv4 file\") added the ability to cache an open fd over a\ncompound. There are a couple of problems with the way this currently\nworks:\n\nIt's racy, as a newly-created nfsd_file can end up with its PENDING bit\ncleared while the nf is hashed, and the nf_file pointer is still zeroed\nout. Other tasks can find it in this state and they expect to see a\nvalid nf_file, and can oops if nf_file is NULL.\n\nAlso, there is no guarantee that we'll end up creating a new nfsd_file\nif one is already in the hash. If an extant entry is in the hash with a\nvalid nf_file, nfs4_get_vfs_file will clobber its nf_file pointer with\nthe value of op_file and the old nf_file will leak.\n\nFix both issues by making a new nfsd_file_acquirei_opened variant that\ntakes an optional file pointer. If one is present when this is called,\nwe'll take a new reference to it instead of trying to open the file. If\nthe nfsd_file already has a valid nf_file, we'll just ignore the\noptional file and pass the nfsd_file back as-is.\n\nAlso rework the tracepoints a bit to allow for an \"opened\" variant and\ndon't try to avoid counting acquisitions in the case where we already\nhave a cached open file."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/filecache.c","fs/nfsd/filecache.h","fs/nfsd/nfs4state.c","fs/nfsd/trace.h"],"versions":[{"version":"c20097329d2c196b818c4666c7820c1378d69d61","lessThan":"45c08a752982116f3287afcd1bd9c50f4fab0c28","status":"affected","versionType":"git"},{"version":"106331a12b0fa5afa6995b1f9ebb03ddcaac6915","lessThan":"0b778361998d6c6356b8d2fc7ddf025fb3224654","status":"affected","versionType":"git"},{"version":"fb70bf124b051d4ded4ce57511dfec6d3ebf2b43","lessThan":"973acfdfe90c8a4e58ade97ff0653a498531ff2e","status":"affected","versionType":"git"},{"version":"fb70bf124b051d4ded4ce57511dfec6d3ebf2b43","lessThan":"0b3a551fa58b4da941efeb209b3770868e2eddd7","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/nfsd/filecache.c","fs/nfsd/filecache.h","fs/nfsd/nfs4state.c","fs/nfsd/trace.h"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.1.7","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2","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":"5.19","versionEndExcluding":"6.1.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/45c08a752982116f3287afcd1bd9c50f4fab0c28"},{"url":"https://git.kernel.org/stable/c/0b778361998d6c6356b8d2fc7ddf025fb3224654"},{"url":"https://git.kernel.org/stable/c/973acfdfe90c8a4e58ade97ff0653a498531ff2e"},{"url":"https://git.kernel.org/stable/c/0b3a551fa58b4da941efeb209b3770868e2eddd7"}],"title":"nfsd: fix handling of cached open files in nfsd4_open codepath","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2023-52909","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:03:02.157963Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-12T17:33:12.921Z"}}]}}