{"id":"CVE-2026-45995","state":"PUBLISHED","title":"io_uring/zcrx: fix user_struct uaf","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/zcrx: fix user_struct uaf\n\nio_free_rbuf_ring() usees a struct user_struct, which\nio_zcrx_ifq_free() puts it down before destroying the ring.","publishedAt":"2026-05-27T12:55:48.587Z","updatedAt":"2026-06-14T17:46:58.368Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5c686456a4e83ef06c74d40be05c21a0ef136684","status":"affected","lessThan":"9feb88eeda6d288f93fcfb6bca563f89e316479d","versionType":"git"},{"version":"5c686456a4e83ef06c74d40be05c21a0ef136684","status":"affected","lessThan":"0fcccfd87152f957fa8312b841f6efef42a05a20","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/zcrx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/zcrx.c"]}],"references":["https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d","https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45995.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45995","state":"PUBLISHED","datePublished":"2026-05-27T12:55:48.587Z","dateUpdated":"2026-06-14T17:46:58.368Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.091Z"},"containers":{"cna":{"title":"io_uring/zcrx: fix user_struct uaf","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/zcrx: fix user_struct uaf\n\nio_free_rbuf_ring() usees a struct user_struct, which\nio_zcrx_ifq_free() puts it down before destroying the ring."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5c686456a4e83ef06c74d40be05c21a0ef136684","status":"affected","lessThan":"9feb88eeda6d288f93fcfb6bca563f89e316479d","versionType":"git"},{"version":"5c686456a4e83ef06c74d40be05c21a0ef136684","status":"affected","lessThan":"0fcccfd87152f957fa8312b841f6efef42a05a20","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/zcrx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/zcrx.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d"},{"url":"https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:46:58.368Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}