{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89543","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.722Z","datePublished":"2026-09-11T19:44:19.679Z","dateUpdated":"2026-09-21T13:14:23.795Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-21T13:14:23.795Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: fix use-after-free in __rpc_clnt_handle_event and __rpc_clnt_remove_pipedir\n\nNormal client creation goes through rpc_setup_pipedir(), which records\nclnt->pipefs_sb, but the mount-event path in __rpc_clnt_handle_event()\ncalls rpc_setup_pipedir_sb() directly and never refreshes that field.\nThe umount path also removes the directory without clearing\nclnt->pipefs_sb.\n\nAfter a late pipefs mount or any remount, rpc_clnt_remove_pipedir()\ncompares the current superblock against a stale pipefs_sb pointer and\nskips cleanup, leaving pipefs dentries whose inode private data still\npoints at a freed rpc_clnt, leading to a potential use-after-free during\nsubsequent rpc_info_open() or rpc_show_info() calls.\n\nFix this by properly updating clnt->pipefs_sb upon mount events and\nclearing it during unmount or failure paths."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/clnt.c"],"versions":[{"version":"bfca5fb4e97c46503ddfc582335917b0cc228264","lessThan":"59527bbfb1eabdb28e95e7c725886cc2c2899cb3","status":"affected","versionType":"git"},{"version":"bfca5fb4e97c46503ddfc582335917b0cc228264","lessThan":"e769fcde3cc73e847b1eb3acd40c04a291cb0c0c","status":"affected","versionType":"git"},{"version":"bfca5fb4e97c46503ddfc582335917b0cc228264","lessThan":"cdf7a233cb94774b0e7df42d9157077983f5022c","status":"affected","versionType":"git"},{"version":"bfca5fb4e97c46503ddfc582335917b0cc228264","lessThan":"932a8cf6abb2b2f8677b79153a823108d8861fe2","status":"affected","versionType":"git"},{"version":"17866066b8ac1cc38fb449670bc15dc9fee4b40a","status":"affected","versionType":"git"},{"version":"7d61d1da2ed1f682c41cae0c8d4719cdaccee5c5","status":"affected","versionType":"git"},{"version":"dedf2a0eb9448ae73b270743e6ea9b108189df46","status":"affected","versionType":"git"},{"version":"194454afa6aa9d6ed74f0c57127bc8beb27c20df","status":"affected","versionType":"git"},{"version":"7749fd2dbef72a52b5c9ffdbf877691950ed4680","status":"affected","versionType":"git"},{"version":"1cdb52ffd6600a37bd355d8dce58ecd03e55e618","status":"affected","versionType":"git"},{"version":"cc2e7ebbeb1d0601f7f3c8d93b78fcc03a95e44a","status":"affected","versionType":"git"},{"version":"4.19.318","lessThan":"4.20","status":"affected","versionType":"semver"},{"version":"5.4.280","lessThan":"5.5","status":"affected","versionType":"semver"},{"version":"5.10.202","lessThan":"5.11","status":"affected","versionType":"semver"},{"version":"5.15.140","lessThan":"5.16","status":"affected","versionType":"semver"},{"version":"6.1.64","lessThan":"6.2","status":"affected","versionType":"semver"},{"version":"6.5.13","lessThan":"6.6","status":"affected","versionType":"semver"},{"version":"6.6.3","lessThan":"6.7","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/clnt.c"],"versions":[{"version":"6.7","status":"affected"},{"version":"0","lessThan":"6.7","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.50","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"6.7","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.3-rc1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.318"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.280"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/59527bbfb1eabdb28e95e7c725886cc2c2899cb3"},{"url":"https://git.kernel.org/stable/c/e769fcde3cc73e847b1eb3acd40c04a291cb0c0c"},{"url":"https://git.kernel.org/stable/c/cdf7a233cb94774b0e7df42d9157077983f5022c"},{"url":"https://git.kernel.org/stable/c/932a8cf6abb2b2f8677b79153a823108d8861fe2"}],"title":"sunrpc: fix use-after-free in __rpc_clnt_handle_event and __rpc_clnt_remove_pipedir","x_generator":{"engine":"bippy-1.2.0"}}}}