{"id":"CVE-2026-90151","revision":"05933f7b5fec4a938d96047fbdf386d0","records":[{"revision":"05933f7b5fec4a938d96047fbdf386d0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90151","aliases":[],"title":"NFSv4: remove callback IDR entry on client allocation failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: remove callback IDR entry on client allocation failure\n\nnfs4_alloc_client() allocates an NFSv4.0 callback identifier before it\nfinishes setting up the client. If any later initialization step fails,\nthe error path frees the nfs_client directly with nfs_free_client(). That\nbypasses nfs_put_client(), which is where the callback IDR entry is\nremoved during normal teardown.\n\nA failed allocation can therefore leave cb_ident_idr pointing at a freed\nnfs_client. A later NFSv4.0 callback lookup by cb_ident would find the\nstale pointer and take a reference to it.\n\nMake the callback IDR removal helper callable by the allocation failure\npath, and remove the callback identifier before freeing the client.\n\nThis was found by a local static-analysis checker for publish-before-free\nlifetime bugs and confirmed by manual inspection.","state":0,"publishedAt":"2026-09-17T16:06:44.987+00:00","modifiedAt":"2026-10-19T08:58:50.239+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/nfs/client.c\",\n                        \"fs/nfs/internal.h\",\n                        \"fs/nfs/nfs4client.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"68c721391b761dbe38d5b0094d2bb6e8489ad92b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"9bfdd0f591307b5198826a0e7a5b2f35f87acd2d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"7c4812eb96bdcafb31a65b12f2aa96659429d1d4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"fc95ca82d5ae598c428ab5a00ae69f8526d59371\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"80b1c3d5a881f7d9081aa9f46da9742878a0f893\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"3f2387e8bfbc4efda5d77c3a11a028d0a119c48f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"5891c03e150920618db0e9c4ea2d772abacdcfd1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f4eecd5da3422e82e88e36c33cbd2595eebcacb1\",\n                            \"lessThan\": \"d05c2007b3d84ccba11dc6e9cb3202768cc72f14\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/nfs/client.c\",\n                        \"fs/nfs/internal.h\",\n                        \"fs/nfs/nfs4client.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.38\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.38\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/68c721391b761dbe38d5b0094d2bb6e8489ad92b","https://git.kernel.org/stable/c/9bfdd0f591307b5198826a0e7a5b2f35f87acd2d","https://git.kernel.org/stable/c/7c4812eb96bdcafb31a65b12f2aa96659429d1d4","https://git.kernel.org/stable/c/fc95ca82d5ae598c428ab5a00ae69f8526d59371","https://git.kernel.org/stable/c/80b1c3d5a881f7d9081aa9f46da9742878a0f893","https://git.kernel.org/stable/c/3f2387e8bfbc4efda5d77c3a11a028d0a119c48f","https://git.kernel.org/stable/c/5891c03e150920618db0e9c4ea2d772abacdcfd1","https://git.kernel.org/stable/c/d05c2007b3d84ccba11dc6e9cb3202768cc72f14"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90151","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90151","identifiers":["CVE-2026-90151"]},"retained":false,"historicalAffected":[]}],"coverage":[]}