{"api_version":"1","generated_at":"2026-04-25T14:02:43+00:00","cve":"CVE-2026-31638","urls":{"html":"https://cve.report/CVE-2026-31638","api":"https://cve.report/api/cve/CVE-2026-31638.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31638","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31638"},"summary":{"title":"rxrpc: Only put the call ref if one was acquired","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Only put the call ref if one was acquired\n\nrxrpc_input_packet_on_conn() can process a to-client packet after the\ncurrent client call on the channel has already been torn down.  In that\ncase chan->call is NULL, rxrpc_try_get_call() returns NULL and there is\nno reference to drop.\n\nThe client-side implicit-end error path does not account for that and\nunconditionally calls rxrpc_put_call().  This turns a protocol error\npath into a kernel crash instead of rejecting the packet.\n\nOnly drop the call reference if one was actually acquired.  Keep the\nexisting protocol error handling unchanged.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-24 15:16:43","updated_at":"2026-04-24 17:51:40"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/8299ca146489664e3c0c90a3b8900d8335b1ede4","name":"https://git.kernel.org/stable/c/8299ca146489664e3c0c90a3b8900d8335b1ede4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9fb09861e2b8d1abfe2efaf260c9f1d30080ea38","name":"https://git.kernel.org/stable/c/9fb09861e2b8d1abfe2efaf260c9f1d30080ea38","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6331f1b24a3e85465f6454e003a3e6c22005a5c5","name":"https://git.kernel.org/stable/c/6331f1b24a3e85465f6454e003a3e6c22005a5c5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0c156aff8a2d4fa0d61db7837641975cf0e5452d","name":"https://git.kernel.org/stable/c/0c156aff8a2d4fa0d61db7837641975cf0e5452d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b8f66447448d6c305a51413a67ec8ed26aa7d1dd","name":"https://git.kernel.org/stable/c/b8f66447448d6c305a51413a67ec8ed26aa7d1dd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31638","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31638","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6ef4f1017c7f844e305283bbd8875af475e2fc b8f66447448d6c305a51413a67ec8ed26aa7d1dd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6ef4f1017c7f844e305283bbd8875af475e2fc 0c156aff8a2d4fa0d61db7837641975cf0e5452d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6ef4f1017c7f844e305283bbd8875af475e2fc 8299ca146489664e3c0c90a3b8900d8335b1ede4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6ef4f1017c7f844e305283bbd8875af475e2fc 9fb09861e2b8d1abfe2efaf260c9f1d30080ea38 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6ef4f1017c7f844e305283bbd8875af475e2fc 6331f1b24a3e85465f6454e003a3e6c22005a5c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.2","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.135 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.82 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.23 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.13 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/rxrpc/io_thread.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b8f66447448d6c305a51413a67ec8ed26aa7d1dd","status":"affected","version":"5e6ef4f1017c7f844e305283bbd8875af475e2fc","versionType":"git"},{"lessThan":"0c156aff8a2d4fa0d61db7837641975cf0e5452d","status":"affected","version":"5e6ef4f1017c7f844e305283bbd8875af475e2fc","versionType":"git"},{"lessThan":"8299ca146489664e3c0c90a3b8900d8335b1ede4","status":"affected","version":"5e6ef4f1017c7f844e305283bbd8875af475e2fc","versionType":"git"},{"lessThan":"9fb09861e2b8d1abfe2efaf260c9f1d30080ea38","status":"affected","version":"5e6ef4f1017c7f844e305283bbd8875af475e2fc","versionType":"git"},{"lessThan":"6331f1b24a3e85465f6454e003a3e6c22005a5c5","status":"affected","version":"5e6ef4f1017c7f844e305283bbd8875af475e2fc","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/rxrpc/io_thread.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.2"},{"lessThan":"6.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.135","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.82","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.23","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.135","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.82","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.23","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.13","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Only put the call ref if one was acquired\n\nrxrpc_input_packet_on_conn() can process a to-client packet after the\ncurrent client call on the channel has already been torn down.  In that\ncase chan->call is NULL, rxrpc_try_get_call() returns NULL and there is\nno reference to drop.\n\nThe client-side implicit-end error path does not account for that and\nunconditionally calls rxrpc_put_call().  This turns a protocol error\npath into a kernel crash instead of rejecting the packet.\n\nOnly drop the call reference if one was actually acquired.  Keep the\nexisting protocol error handling unchanged."}],"providerMetadata":{"dateUpdated":"2026-04-24T14:44:52.122Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b8f66447448d6c305a51413a67ec8ed26aa7d1dd"},{"url":"https://git.kernel.org/stable/c/0c156aff8a2d4fa0d61db7837641975cf0e5452d"},{"url":"https://git.kernel.org/stable/c/8299ca146489664e3c0c90a3b8900d8335b1ede4"},{"url":"https://git.kernel.org/stable/c/9fb09861e2b8d1abfe2efaf260c9f1d30080ea38"},{"url":"https://git.kernel.org/stable/c/6331f1b24a3e85465f6454e003a3e6c22005a5c5"}],"title":"rxrpc: Only put the call ref if one was acquired","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31638","datePublished":"2026-04-24T14:44:52.122Z","dateReserved":"2026-03-09T15:48:24.125Z","dateUpdated":"2026-04-24T14:44:52.122Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-24 15:16:43","lastModifiedDate":"2026-04-24 17:51:40","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31638","Ordinal":"1","Title":"rxrpc: Only put the call ref if one was acquired","CVE":"CVE-2026-31638","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31638","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Only put the call ref if one was acquired\n\nrxrpc_input_packet_on_conn() can process a to-client packet after the\ncurrent client call on the channel has already been torn down.  In that\ncase chan->call is NULL, rxrpc_try_get_call() returns NULL and there is\nno reference to drop.\n\nThe client-side implicit-end error path does not account for that and\nunconditionally calls rxrpc_put_call().  This turns a protocol error\npath into a kernel crash instead of rejecting the packet.\n\nOnly drop the call reference if one was actually acquired.  Keep the\nexisting protocol error handling unchanged.","Type":"Description","Title":"rxrpc: Only put the call ref if one was acquired"}]}}}