{"id":"CVE-2026-80982","revision":"bd17dd54e8ad4df0b78029fb66766083","records":[{"revision":"bd17dd54e8ad4df0b78029fb66766083","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80982","aliases":[],"title":"net/smc: fix use-after-free in smc_rx_pipe_buf_release()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix use-after-free in smc_rx_pipe_buf_release()\n\nsmc_rx_splice() hands RMB pages to a pipe and takes a socket reference\nper entry so the smc_sock stays alive until the reader finishes. The\nconnection does not: a concurrent close runs smc_conn_free(), which\nreleases the receive buffer back to the link group pool.\n\nsmc_rx_pipe_buf_release() tests sk_state before taking the socket lock.\nThe state can change between the test and the lock, and\nsmc_rx_update_cons() then dereferences conn->rmb_desc and walks\nconn->lgr, which smc_conn_free() has already released. On the\nis_reg_err path smcr_buf_unuse() frees the descriptor outright, so\nthis is a use-after-free.\n\nTake the socket lock first and test conn->freed instead.\nsmc_conn_free() sets that flag before releasing anything, and every\ncaller holds the socket lock. The two paths exclude each other: either\nthe pipe release runs first with everything valid, or it sees the flag\nand skips the update.","state":0,"publishedAt":"2026-09-11T19:42:42.243+00:00","modifiedAt":"2026-10-19T08:46:06.717+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/smc/smc_rx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9014db202cb764b8e14c53e7bacc81f9a1a2ba7f\",\n                            \"lessThan\": \"dadd97c8296b23aa816e91ed70041820ae087baa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9014db202cb764b8e14c53e7bacc81f9a1a2ba7f\",\n                            \"lessThan\": \"df441f3efbb50eb0f120b8de4bf441c31fb0551d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9014db202cb764b8e14c53e7bacc81f9a1a2ba7f\",\n                            \"lessThan\": \"6a644a7340df978785f3109d1e0726a982ce2c6f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9014db202cb764b8e14c53e7bacc81f9a1a2ba7f\",\n                            \"lessThan\": \"0761e49aa78c2f1362511054c6e9670653858837\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9014db202cb764b8e14c53e7bacc81f9a1a2ba7f\",\n                            \"lessThan\": \"0926f59ca0f94120895b92180c636a48d0ed3a6d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9014db202cb764b8e14c53e7bacc81f9a1a2ba7f\",\n                            \"lessThan\": \"c924884743e948e25625b7fbf3ee2a9325a204a7\",\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/smc/smc_rx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.18\",\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\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/dadd97c8296b23aa816e91ed70041820ae087baa","https://git.kernel.org/stable/c/df441f3efbb50eb0f120b8de4bf441c31fb0551d","https://git.kernel.org/stable/c/6a644a7340df978785f3109d1e0726a982ce2c6f","https://git.kernel.org/stable/c/0761e49aa78c2f1362511054c6e9670653858837","https://git.kernel.org/stable/c/0926f59ca0f94120895b92180c636a48d0ed3a6d","https://git.kernel.org/stable/c/c924884743e948e25625b7fbf3ee2a9325a204a7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80982","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80982","identifiers":["CVE-2026-80982"]},"retained":false,"historicalAffected":[]}],"coverage":[]}