CVE-2026-80984

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80984", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.811Z", "datePublished": "2026-09-11T19:42:43.573Z", "dateUpdated": "2026-10-19T08:46:08.671Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:46:08.671Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: do not dereference an unset send buffer on the SMC-D teardown path\n\nsmc_close_stream_wait() calls smc_tx_prepared_sends() from inside its\nsk_wait_event() condition, and sk_wait_event() evaluates that condition\nonce with the socket lock released. smcd_buf_detach() clears\nconn->sndbuf_desc from smc_conn_kill() under lock_sock(), so a link group\nterminating while a socket waits there leaves the helper dereferencing\nNULL, faulting out of close(). SIOCOUTQ reads the field by hand, and\nsmc_close_cancel_work() drops the lock across two cancel_*_sync() calls.\n\nSample the pointer once in the helper, report nothing prepared while it is\nunset, and bound the ioctl the same way. The receive tasklet dereferences\nthe field directly in smc_cdc_msg_recv_action(), not through this helper;\n1/2 is what keeps it from running that late."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/af_smc.c", "net/smc/smc_tx.h"], "versions": [{"version": "21f6f41e82e59740e26e06e77bdf58dc7f6f08dd", "lessThan": "ab26e12dd5d2f43d939fcf456933a816e81d2e51", "status": "affected", "versionType": "git"}, {"version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "lessThan": "e3fcff8d22a6c9540748846cd800443a643553a6", "status": "affected", "versionType": "git"}, {"version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "lessThan": "f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45", "status": "affected", "versionType": "git"}, {"version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "lessThan": "f517cf02033801a28f98d86ca613a3533cf066b3", "status": "affected", "versionType": "git"}, {"version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "lessThan": "b395dd319cea422239cb45b998fb38d7e373af87", "status": "affected", "versionType": "git"}, {"version": "6.6.66", "lessThan": "6.6.157", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/af_smc.c", "net/smc/smc_tx.h"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "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"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.66", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ab26e12dd5d2f43d939fcf456933a816e81d2e51"}, {"url": "https://git.kernel.org/stable/c/e3fcff8d22a6c9540748846cd800443a643553a6"}, {"url": "https://git.kernel.org/stable/c/f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45"}, {"url": "https://git.kernel.org/stable/c/f517cf02033801a28f98d86ca613a3533cf066b3"}, {"url": "https://git.kernel.org/stable/c/b395dd319cea422239cb45b998fb38d7e373af87"}], "title": "net/smc: do not dereference an unset send buffer on the SMC-D teardown path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/smc/af_smc.c", "net/smc/smc_tx.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ab26e12dd5d2f43d939fcf456933a816e81d2e51", "status": "affected", "version": "21f6f41e82e59740e26e06e77bdf58dc7f6f08dd", "versionType": "git"}, {"lessThan": "e3fcff8d22a6c9540748846cd800443a643553a6", "status": "affected", "version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "versionType": "git"}, {"lessThan": "f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45", "status": "affected", "version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "versionType": "git"}, {"lessThan": "f517cf02033801a28f98d86ca613a3533cf066b3", "status": "affected", "version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "versionType": "git"}, {"lessThan": "b395dd319cea422239cb45b998fb38d7e373af87", "status": "affected", "version": "ae2be35cbed2c8385e890147ea321a3fcc3ca5fa", "versionType": "git"}, {"lessThan": "6.6.157", "status": "affected", "version": "6.6.66", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/smc/af_smc.c", "net/smc/smc_tx.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: do not dereference an unset send buffer on the SMC-D teardown path\n\nsmc_close_stream_wait() calls smc_tx_prepared_sends() from inside its\nsk_wait_event() condition, and sk_wait_event() evaluates that condition\nonce with the socket lock released. smcd_buf_detach() clears\nconn->sndbuf_desc from smc_conn_kill() under lock_sock(), so a link group\nterminating while a socket waits there leaves the helper dereferencing\nNULL, faulting out of close(). SIOCOUTQ reads the field by hand, and\nsmc_close_cancel_work() drops the lock across two cancel_*_sync() calls.\n\nSample the pointer once in the helper, report nothing prepared while it is\nunset, and bound the ioctl the same way. The receive tasklet dereferences\nthe field directly in smc_cdc_msg_recv_action(), not through this helper;\n1/2 is what keeps it from running that late."}], "id": "CVE-2026-80984", "lastModified": "2026-10-19T09:17:30.953", "metrics": {}, "published": "2026-09-11T20:19:04.920", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ab26e12dd5d2f43d939fcf456933a816e81d2e51"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b395dd319cea422239cb45b998fb38d7e373af87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3fcff8d22a6c9540748846cd800443a643553a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f517cf02033801a28f98d86ca613a3533cf066b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux Kernel: Denial of Service in net/smc due to NULL pointer dereference", "id": "2532437", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532437"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the `net/smc` component of the Linux kernel. When a link group terminates while a socket is waiting in `smc_close_stream_wait()`, a NULL pointer dereference can occur during the SMC-D teardown path. This can lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-80984", "public_date": "2026-09-11T19:42:43Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80984\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80984\nhttps://git.kernel.org/stable/c/b395dd319cea422239cb45b998fb38d7e373af87\nhttps://git.kernel.org/stable/c/e3fcff8d22a6c9540748846cd800443a643553a6\nhttps://git.kernel.org/stable/c/f517cf02033801a28f98d86ca613a3533cf066b3\nhttps://git.kernel.org/stable/c/f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ae2be35cbed2c8385e890147ea321a3fcc3ca5fa,e3fcff8d22a6c9540748846cd800443a643553a6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ae2be35cbed2c8385e890147ea321a3fcc3ca5fa,f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ae2be35cbed2c8385e890147ea321a3fcc3ca5fa,f517cf02033801a28f98d86ca613a3533cf066b3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ae2be35cbed2c8385e890147ea321a3fcc3ca5fa,b395dd319cea422239cb45b998fb38d7e373af87)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "21f6f41e82e59740e26e06e77bdf58dc7f6f08dd"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.66,6.7)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-13T09:15:07.305295+00:00", "updated": "2026-09-21T02:15:08.508335+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}