{"id":"CVE-2023-52895","state":"PUBLISHED","title":"io_uring/poll: don't reissue in case of poll race on multishot request","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: don't reissue in case of poll race on multishot request\n\nA previous commit fixed a poll race that can occur, but it's only\napplicable for multishot requests. For a multishot request, we can safely\nignore a spurious wakeup, as we never leave the waitqueue to begin with.\n\nA blunt reissue of a multishot armed request can cause us to leak a\nbuffer, if they are ring provided. While this seems like a bug in itself,\nit's not really defined behavior to reissue a multishot request directly.\nIt's less efficient to do so as well, and not required to rearm anything\nlike it is for singleshot poll requests.","publishedAt":"2024-08-21T06:10:35.179Z","updatedAt":"2026-05-11T19:35:04.016Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c06015ebc4367be38904b88582e13cc079672075","status":"affected","lessThan":"36fc7317cdb16cfeae0f879916995037bb615ac4","versionType":"git"},{"version":"6e5aedb9324aab1c14a23fae3d8eeb64a679c20e","status":"affected","lessThan":"8caa03f10bf92cb8657408a6ece6a8a73f96ce13","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/poll.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6.1.7","status":"affected","lessThan":"6.1.8","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/poll.c"]}],"references":["https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4","https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52895.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52895","state":"PUBLISHED","datePublished":"2024-08-21T06:10:35.179Z","dateUpdated":"2026-05-11T19:35:04.016Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T06:07:11.013Z"},"containers":{"cna":{"title":"io_uring/poll: don't reissue in case of poll race on multishot request","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: don't reissue in case of poll race on multishot request\n\nA previous commit fixed a poll race that can occur, but it's only\napplicable for multishot requests. For a multishot request, we can safely\nignore a spurious wakeup, as we never leave the waitqueue to begin with.\n\nA blunt reissue of a multishot armed request can cause us to leak a\nbuffer, if they are ring provided. While this seems like a bug in itself,\nit's not really defined behavior to reissue a multishot request directly.\nIt's less efficient to do so as well, and not required to rearm anything\nlike it is for singleshot poll requests."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c06015ebc4367be38904b88582e13cc079672075","status":"affected","lessThan":"36fc7317cdb16cfeae0f879916995037bb615ac4","versionType":"git"},{"version":"6e5aedb9324aab1c14a23fae3d8eeb64a679c20e","status":"affected","lessThan":"8caa03f10bf92cb8657408a6ece6a8a73f96ce13","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/poll.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6.1.7","status":"affected","lessThan":"6.1.8","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/poll.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4"},{"url":"https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:35:04.016Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.7","versionEndExcluding":"6.1.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2023-52895","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:03:46.864583Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:33:13.444Z"}}]}}}