{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80980", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.811Z", "datePublished": "2026-09-11T19:42:40.832Z", "dateUpdated": "2026-09-11T19:42:40.832Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:42:40.832Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: stop killed, freed and out_of_sync sharing a byte\n\nThe three connection state flags are single-bit bitfields, so they occupy\none byte of struct smc_connection and every store to one is a\nread-modify-write of the other two:\n\n u8 killed : 1;\n u8 freed : 1;\n u8 out_of_sync : 1;\n\nThey are not written under a common lock. smc_cdc_msg_validate() sets\nout_of_sync from the receive tasklet, while smc_conn_kill() sets killed\nfrom process context under lock_sock(), and the receive path does not defer\nto the backlog when the socket is owned -- smc_cdc_msg_recv() takes only\nbh_lock_sock().\n\nGive each flag its own byte so a store no longer touches its neighbours.\nAll readers test them as booleans and are unchanged. struct smc_connection\ngrows by two bytes."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/smc.h"], "versions": [{"version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e", "lessThan": "313f79149eb337411c64e2c247234b62ef9a3cb9", "status": "affected", "versionType": "git"}, {"version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e", "lessThan": "2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec", "status": "affected", "versionType": "git"}, {"version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e", "lessThan": "db51a8658c11a82432b64999519a269c3aabb447", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/smc.h"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "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-rc1", "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": "5.8", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/313f79149eb337411c64e2c247234b62ef9a3cb9"}, {"url": "https://git.kernel.org/stable/c/2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec"}, {"url": "https://git.kernel.org/stable/c/db51a8658c11a82432b64999519a269c3aabb447"}], "title": "net/smc: stop killed, freed and out_of_sync sharing a byte", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/smc/smc.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "313f79149eb337411c64e2c247234b62ef9a3cb9", "status": "affected", "version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e", "versionType": "git"}, {"lessThan": "2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec", "status": "affected", "version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e", "versionType": "git"}, {"lessThan": "db51a8658c11a82432b64999519a269c3aabb447", "status": "affected", "version": "b286a0651e4404ab96cdfdcdad8a839a26b3751e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/smc/smc.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"lessThan": "5.8", "status": "unaffected", "version": "0", "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-rc1", "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: stop killed, freed and out_of_sync sharing a byte\n\nThe three connection state flags are single-bit bitfields, so they occupy\none byte of struct smc_connection and every store to one is a\nread-modify-write of the other two:\n\n u8 killed : 1;\n u8 freed : 1;\n u8 out_of_sync : 1;\n\nThey are not written under a common lock. smc_cdc_msg_validate() sets\nout_of_sync from the receive tasklet, while smc_conn_kill() sets killed\nfrom process context under lock_sock(), and the receive path does not defer\nto the backlog when the socket is owned -- smc_cdc_msg_recv() takes only\nbh_lock_sock().\n\nGive each flag its own byte so a store no longer touches its neighbours.\nAll readers test them as booleans and are unchanged. struct smc_connection\ngrows by two bytes."}], "id": "CVE-2026-80980", "lastModified": "2026-09-11T20:19:04.407", "metrics": {}, "published": "2026-09-11T20:19:04.407", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/313f79149eb337411c64e2c247234b62ef9a3cb9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/db51a8658c11a82432b64999519a269c3aabb447"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: SMC concurrency flaw in connection state flags", "id": "2532124", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532124"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.8", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-366", "details": ["A flaw was found in the Linux kernel's SMC (Server Message Block over Remote Direct Memory Access) protocol implementation. A concurrency issue exists where three connection state flags (killed, freed, and out_of_sync) share a single byte in the `smc_connection` structure without proper locking mechanisms. This allows for a read-modify-write race condition when different functions attempt to modify these flags simultaneously. This could lead to incorrect connection state management, potentially causing unexpected behavior or a denial of service."], "name": "CVE-2026-80980", "public_date": "2026-09-11T19:42:40Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80980\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80980\nhttps://git.kernel.org/stable/c/2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec\nhttps://git.kernel.org/stable/c/313f79149eb337411c64e2c247234b62ef9a3cb9\nhttps://git.kernel.org/stable/c/db51a8658c11a82432b64999519a269c3aabb447"], "threat_severity": "Moderate"}

{"created": "2026-09-12T02:30:06.165668+00:00", "updated": "2026-09-12T02:30:06.165673+00:00", "vendors": []}