{"id":"CVE-2026-31638","revision":"1d50e2bf78374791a370ed9359d0a1c3","records":[{"revision":"1d50e2bf78374791a370ed9359d0a1c3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31638","aliases":[],"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":0,"publishedAt":"2026-04-24T14:44:52.122+00:00","modifiedAt":"2026-10-19T18:56:01.209+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                        \"net/rxrpc/io_thread.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5e6ef4f1017c7f844e305283bbd8875af475e2fc\",\n                            \"lessThan\": \"b8f66447448d6c305a51413a67ec8ed26aa7d1dd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5e6ef4f1017c7f844e305283bbd8875af475e2fc\",\n                            \"lessThan\": \"0c156aff8a2d4fa0d61db7837641975cf0e5452d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5e6ef4f1017c7f844e305283bbd8875af475e2fc\",\n                            \"lessThan\": \"8299ca146489664e3c0c90a3b8900d8335b1ede4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5e6ef4f1017c7f844e305283bbd8875af475e2fc\",\n                            \"lessThan\": \"9fb09861e2b8d1abfe2efaf260c9f1d30080ea38\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5e6ef4f1017c7f844e305283bbd8875af475e2fc\",\n                            \"lessThan\": \"6331f1b24a3e85465f6454e003a3e6c22005a5c5\",\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                        \"net/rxrpc/io_thread.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.135\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.82\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.23\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.13\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\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:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/b8f66447448d6c305a51413a67ec8ed26aa7d1dd","https://git.kernel.org/stable/c/0c156aff8a2d4fa0d61db7837641975cf0e5452d","https://git.kernel.org/stable/c/8299ca146489664e3c0c90a3b8900d8335b1ede4","https://git.kernel.org/stable/c/9fb09861e2b8d1abfe2efaf260c9f1d30080ea38","https://git.kernel.org/stable/c/6331f1b24a3e85465f6454e003a3e6c22005a5c5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31638","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31638","identifiers":["CVE-2026-31638"]},"retained":false,"historicalAffected":[]}],"coverage":[]}