{"schema":"threatline.record/2","record":{"id":"CVE-2026-93207","aliases":[],"summary":"SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry\n\nsvcauth_gss_decode_credbody() writes the caller's\nrpc_gss_wire_cred field by field and assigns gc_ctx.len only on\nthe success tail.  The caller storage is svcdata->clcred, which\nlives in the per-svc_rqst gss_svc_data and is reused across\nrequests.  Early decode failures leave partially decoded state\nmixed with residue from the prior request.\n\nThe trailing body_len tightness check is the sharpest case:\nxdr_stream_decode_opaque_inline() has already written gc_ctx.data\nwith a borrowed inline pointer into the current request's XDR\npages, but gc_ctx.len retains its prior value.  Once the request\npages are released the pooled clcred carries a dangling pointer\npaired with a stale length.\n\nZero the caller's rpc_gss_wire_cred at function entry so that\nevery early-return path leaves a deterministic all-zero cred.\nOn the trailing tightness-check path, gc_ctx.len is now zero\ninstead of stale, which neuters length-driven consumers such as\ngss_svc_searchbyctx() that would otherwise walk the dangling\ndata pointer.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93207","source_modified_at":"2026-10-19T09:07:19.480Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"b0bc53470d1af01f62a0fe2d405cf56477804863","lessThan":"56b29d62017c7dd1718d060dd5b3a2ce61095d0c","status":"affected","versionType":"git"},{"version":"b0bc53470d1af01f62a0fe2d405cf56477804863","lessThan":"0e18641708eaa8bc3c1ff338cd844aeadbd52bac","status":"affected","versionType":"git"},{"version":"b0bc53470d1af01f62a0fe2d405cf56477804863","lessThan":"e0778464049b0238f2915a40007a4154f86cf351","status":"affected","versionType":"git"},{"version":"b0bc53470d1af01f62a0fe2d405cf56477804863","lessThan":"0fa8a8acae57e6373962741d5b06d13f44aba6a9","status":"affected","versionType":"git"},{"version":"b0bc53470d1af01f62a0fe2d405cf56477804863","lessThan":"11539e8fcce0b0af062ae5fecf7b3676c2f7aeed","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93207","source_modified_at":"2026-10-19T09:07:19.480Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.3","status":"affected"},{"version":"0","lessThan":"6.3","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.109","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","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93207","source_modified_at":"2026-10-19T09:07:19.480Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"56b29d62017c7dd1718d060dd5b3a2ce61095d0c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93207","source_modified_at":"2026-10-19T09:07:19.480Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0e18641708eaa8bc3c1ff338cd844aeadbd52bac","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93207","source_modified_at":"2026-10-19T09:07:19.480Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0fa8a8acae57e6373962741d5b06d13f44aba6a9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-93207","source_modified_at":"2026-10-19T09:07:19.480Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"11539e8fcce0b0af062ae5fecf7b3676c2f7aeed","basis":"first unaffected version stated in the CVE record"}],"cvss":9.8,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00473,"percentile":0.39957,"score_date":"2026-10-23"},"published_at":"2026-09-24T15:10:30.942Z","modified_at":"2026-10-19T09:07:19.480Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-93207","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:07:19.480Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-93207","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/56b29d62017c7dd1718d060dd5b3a2ce61095d0c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0e18641708eaa8bc3c1ff338cd844aeadbd52bac"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/e0778464049b0238f2915a40007a4154f86cf351"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0fa8a8acae57e6373962741d5b06d13f44aba6a9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/11539e8fcce0b0af062ae5fecf7b3676c2f7aeed"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:07:19.480Z","content_hash":"46369ee4b412fb9e479df1bd4bf064bb7f5f5f52b8a32f69fc2bb9065eb43abc"}}