{"id":"CVE-2026-23259","state":"PUBLISHED","title":"io_uring/rw: free potentially allocated iovec on cache put failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rw: free potentially allocated iovec on cache put failure\n\nIf a read/write request goes through io_req_rw_cleanup() and has an\nallocated iovec attached and fails to put to the rw_cache, then it may\nend up with an unaccounted iovec pointer. Have io_rw_recycle() return\nwhether it recycled the request or not, and use that to gauge whether to\nfree a potential iovec or not.","publishedAt":"2026-03-18T17:41:05.827Z","updatedAt":"2026-10-21T12:39:03.826Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a9165b83c1937eeed1f0c731468216d6371d647f","status":"affected","lessThan":"41cda4c66846c3bfcdeaf28444ccabbb55e64cf1","versionType":"git"},{"version":"a9165b83c1937eeed1f0c731468216d6371d647f","status":"affected","lessThan":"1d5f2329ab4df65c2ee011b986d8a6e05ad0f67c","versionType":"git"},{"version":"a9165b83c1937eeed1f0c731468216d6371d647f","status":"affected","lessThan":"4b9748055457ac3a0710bf210c229d01ea1b01b9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/rw.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.10","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/rw.c"]}],"references":["https://git.kernel.org/stable/c/41cda4c66846c3bfcdeaf28444ccabbb55e64cf1","https://git.kernel.org/stable/c/1d5f2329ab4df65c2ee011b986d8a6e05ad0f67c","https://git.kernel.org/stable/c/4b9748055457ac3a0710bf210c229d01ea1b01b9"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23259.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23259","state":"PUBLISHED","datePublished":"2026-03-18T17:41:05.827Z","dateUpdated":"2026-10-21T12:39:03.826Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.990Z"},"containers":{"cna":{"title":"io_uring/rw: free potentially allocated iovec on cache put failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rw: free potentially allocated iovec on cache put failure\n\nIf a read/write request goes through io_req_rw_cleanup() and has an\nallocated iovec attached and fails to put to the rw_cache, then it may\nend up with an unaccounted iovec pointer. Have io_rw_recycle() return\nwhether it recycled the request or not, and use that to gauge whether to\nfree a potential iovec or not."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a9165b83c1937eeed1f0c731468216d6371d647f","status":"affected","lessThan":"41cda4c66846c3bfcdeaf28444ccabbb55e64cf1","versionType":"git"},{"version":"a9165b83c1937eeed1f0c731468216d6371d647f","status":"affected","lessThan":"1d5f2329ab4df65c2ee011b986d8a6e05ad0f67c","versionType":"git"},{"version":"a9165b83c1937eeed1f0c731468216d6371d647f","status":"affected","lessThan":"4b9748055457ac3a0710bf210c229d01ea1b01b9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/rw.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.10","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/rw.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/41cda4c66846c3bfcdeaf28444ccabbb55e64cf1"},{"url":"https://git.kernel.org/stable/c/1d5f2329ab4df65c2ee011b986d8a6e05ad0f67c"},{"url":"https://git.kernel.org/stable/c/4b9748055457ac3a0710bf210c229d01ea1b01b9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:39:03.826Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}