{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-40900","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-07-12T12:17:45.579Z","datePublished":"2024-07-12T12:20:42.192Z","dateUpdated":"2025-11-03T21:57:27.388Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T09:17:24.646Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: remove requests from xarray during flushing requests\n\nEven with CACHEFILES_DEAD set, we can still read the requests, so in the\nfollowing concurrency the request may be used after it has been freed:\n\n     mount  |   daemon_thread1    |    daemon_thread2\n------------------------------------------------------------\n cachefiles_ondemand_init_object\n  cachefiles_ondemand_send_req\n   REQ_A = kzalloc(sizeof(*req) + data_len)\n   wait_for_completion(&REQ_A->done)\n            cachefiles_daemon_read\n             cachefiles_ondemand_daemon_read\n                                  // close dev fd\n                                  cachefiles_flush_reqs\n                                   complete(&REQ_A->done)\n   kfree(REQ_A)\n              xa_lock(&cache->reqs);\n              cachefiles_ondemand_select_req\n                req->msg.opcode != CACHEFILES_OP_READ\n                // req use-after-free !!!\n              xa_unlock(&cache->reqs);\n                                   xa_destroy(&cache->reqs)\n\nHence remove requests from cache->reqs when flushing them to avoid\naccessing freed requests."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/cachefiles/daemon.c"],"versions":[{"version":"c8383054506c77b814489c09877b5db83fd4abf2","lessThan":"9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7","status":"affected","versionType":"git"},{"version":"c8383054506c77b814489c09877b5db83fd4abf2","lessThan":"50d0e55356ba5b84ffb51c42704126124257e598","status":"affected","versionType":"git"},{"version":"c8383054506c77b814489c09877b5db83fd4abf2","lessThan":"37e19cf86a520d65de1de9cb330415c332a40d19","status":"affected","versionType":"git"},{"version":"c8383054506c77b814489c09877b5db83fd4abf2","lessThan":"0fc75c5940fa634d84e64c93bfc388e1274ed013","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/cachefiles/daemon.c"],"versions":[{"version":"5.19","status":"affected"},{"version":"0","lessThan":"5.19","status":"unaffected","versionType":"semver"},{"version":"6.1.95","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.35","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.9.6","lessThanOrEqual":"6.9.*","status":"unaffected","versionType":"semver"},{"version":"6.10","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":"6.1.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.9.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.10"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7"},{"url":"https://git.kernel.org/stable/c/50d0e55356ba5b84ffb51c42704126124257e598"},{"url":"https://git.kernel.org/stable/c/37e19cf86a520d65de1de9cb330415c332a40d19"},{"url":"https://git.kernel.org/stable/c/0fc75c5940fa634d84e64c93bfc388e1274ed013"}],"title":"cachefiles: remove requests from xarray during flushing requests","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/50d0e55356ba5b84ffb51c42704126124257e598","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/37e19cf86a520d65de1de9cb330415c332a40d19","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/0fc75c5940fa634d84e64c93bfc388e1274ed013","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T21:57:27.388Z"}},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-40900","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T17:06:34.508297Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:34:38.653Z"}}]}}