{"id":"CVE-2026-45964","state":"PUBLISHED","title":"SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: fix gss_auth kref leak in gss_alloc_msg error path\n\nCommit 5940d1cf9f42 (\"SUNRPC: Rebalance a kref in auth_gss.c\") added\na kref_get(&gss_auth->kref) call to balance the gss_put_auth() done\nin gss_release_msg(), but forgot to add a corresponding kref_put()\non the error path when kstrdup_const() fails.\n\nIf service_name is non-NULL and kstrdup_const() fails, the function\njumps to err_put_pipe_version which calls put_pipe_version() and\nkfree(gss_msg), but never releases the gss_auth reference. This leads\nto a kref leak where the gss_auth structure is never freed.\n\nAdd a forward declaration for gss_free_callback() and call kref_put()\nin the err_put_pipe_version error path to properly release the\nreference taken earlier.","publishedAt":"2026-05-27T12:18:22.052Z","updatedAt":"2026-05-27T12:18:22.052Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"3b2b6c42070ce4204936288253baf101e995c2d3","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"655c9ba9915f05266998dbbf4b76b3c79b8a70aa","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"e464e26b2457005c87e158570498274b9f3b90c7","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"c20f925214249bb4fc04f7e197bea142a6438af6","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"a2d4e9a76de0b2178001214ba5de5bf94a7354aa","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"dd2fdc3504592d85e549c523b054898a036a6afe","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/auth_gss.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.2","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/auth_gss.c"]}],"references":["https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3","https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7","https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6","https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa","https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7","https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6","https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa","https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45964.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45964","state":"PUBLISHED","datePublished":"2026-05-27T12:18:22.052Z","dateUpdated":"2026-05-27T12:18:22.052Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.089Z"},"containers":{"cna":{"title":"SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: fix gss_auth kref leak in gss_alloc_msg error path\n\nCommit 5940d1cf9f42 (\"SUNRPC: Rebalance a kref in auth_gss.c\") added\na kref_get(&gss_auth->kref) call to balance the gss_put_auth() done\nin gss_release_msg(), but forgot to add a corresponding kref_put()\non the error path when kstrdup_const() fails.\n\nIf service_name is non-NULL and kstrdup_const() fails, the function\njumps to err_put_pipe_version which calls put_pipe_version() and\nkfree(gss_msg), but never releases the gss_auth reference. This leads\nto a kref leak where the gss_auth structure is never freed.\n\nAdd a forward declaration for gss_free_callback() and call kref_put()\nin the err_put_pipe_version error path to properly release the\nreference taken earlier."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"3b2b6c42070ce4204936288253baf101e995c2d3","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"655c9ba9915f05266998dbbf4b76b3c79b8a70aa","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"e464e26b2457005c87e158570498274b9f3b90c7","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"c20f925214249bb4fc04f7e197bea142a6438af6","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"a2d4e9a76de0b2178001214ba5de5bf94a7354aa","versionType":"git"},{"version":"5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e","status":"affected","lessThan":"dd2fdc3504592d85e549c523b054898a036a6afe","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/auth_gss.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.2","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/auth_gss.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3"},{"url":"https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7"},{"url":"https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6"},{"url":"https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa"},{"url":"https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7"},{"url":"https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6"},{"url":"https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa"},{"url":"https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-27T12:18:22.052Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.10.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}