CVE-2026-89970

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89970", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.778Z", "datePublished": "2026-09-16T10:32:50.306Z", "dateUpdated": "2026-10-19T08:55:43.826Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:55:43.826Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: Synchronize timeout work during SQ teardown\n\nnvmet_auth_sq_free() cancels auth_expired_work with\ncancel_delayed_work(). If the work has already started, cancellation does\nnot wait for the callback. Transport teardown can consequently free or\nreuse the queue containing struct nvmet_sq while\nnvmet_auth_expired_work() still accesses that SQ.\n\nAdd a teardown-specific helper that synchronously drains the delayed work\nbefore freeing authentication state, and use it from nvmet_sq_destroy().\nKeep the non-synchronous helper for in-band authentication state cleanup,\nwhere the SQ owner remains alive."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The UAF is in nvmet-auth timeout work reached via AUTH_SEND on NVMe-oF targets; nvmet-tcp (and nvmet-rdma) accept remote connections, so a network initiator can arm the timer and tear down the queue over TCP/RDMA.\nAC:L - The attacker controls both sides of the race: AUTH_SEND schedules auth_expired_work with an attacker-chosen KATO delay, and closing the connection runs nvmet_sq_destroy(); cancel_delayed_work() does not wait, so the race is repeatable.\nPR:N - AUTH_SEND is dispatched as a Fabrics command before nvmet_check_auth_status() and before DH-HMAC-CHAP credentials are verified; discovery accepts any host NQN, so no Linux privileges or verified secrets are required.\nUI:N - No victim user action is required; the attacker connects to an already-deployed NVMe-oF target, sends AUTH_SEND to arm the timeout, and disconnects when the work is due.\nS:U - The use-after-free corrupts the in-kernel nvmet_sq/queue object on the target host and does not cross a VM, hypervisor, or IOMMU security boundary.\nC:H - Transport teardown can free or reuse the queue containing struct nvmet_sq while nvmet_auth_expired_work() still accesses it; that UAF can be leveraged for kernel information disclosure via heap reuse.\nI:H - The delayed work writes dhchap_step and dhchap_tid into a potentially freed or reused queue object, giving a kernel UAF write primitive exploitable for memory corruption and control-flow hijacking.\nA:H - Racing the timeout callback against SQ teardown is a kernel UAF of the queue and can oops or panic; the work may also dereference sq->ctrl after teardown has already cleared it."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/auth.c", "drivers/nvme/target/core.c", "drivers/nvme/target/nvmet.h"], "versions": [{"version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "lessThan": "664022fa1c93f4eba09ef5ee02411b9709dd7a93", "status": "affected", "versionType": "git"}, {"version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "lessThan": "c3c126a6142a1335bc8c34a5607c39cf01daf295", "status": "affected", "versionType": "git"}, {"version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "lessThan": "c17c87bde6d6f5252a6a6f0a94b2430164aa28d5", "status": "affected", "versionType": "git"}, {"version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "lessThan": "7555ddd60af72df2862dd8f9b730a9848577edda", "status": "affected", "versionType": "git"}, {"version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "lessThan": "eb4f9127a2b8a152743f1ee597627e2f69cb54fe", "status": "affected", "versionType": "git"}, {"version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "lessThan": "eaa948c0e19b1bb2d93262207bca0c3d19cc3406", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/auth.c", "drivers/nvme/target/core.c", "drivers/nvme/target/nvmet.h"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "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": "6.0", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/664022fa1c93f4eba09ef5ee02411b9709dd7a93"}, {"url": "https://git.kernel.org/stable/c/c3c126a6142a1335bc8c34a5607c39cf01daf295"}, {"url": "https://git.kernel.org/stable/c/c17c87bde6d6f5252a6a6f0a94b2430164aa28d5"}, {"url": "https://git.kernel.org/stable/c/7555ddd60af72df2862dd8f9b730a9848577edda"}, {"url": "https://git.kernel.org/stable/c/eb4f9127a2b8a152743f1ee597627e2f69cb54fe"}, {"url": "https://git.kernel.org/stable/c/eaa948c0e19b1bb2d93262207bca0c3d19cc3406"}], "title": "nvmet-auth: Synchronize timeout work during SQ teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/target/auth.c", "drivers/nvme/target/core.c", "drivers/nvme/target/nvmet.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "664022fa1c93f4eba09ef5ee02411b9709dd7a93", "status": "affected", "version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "versionType": "git"}, {"lessThan": "c3c126a6142a1335bc8c34a5607c39cf01daf295", "status": "affected", "version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "versionType": "git"}, {"lessThan": "c17c87bde6d6f5252a6a6f0a94b2430164aa28d5", "status": "affected", "version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "versionType": "git"}, {"lessThan": "7555ddd60af72df2862dd8f9b730a9848577edda", "status": "affected", "version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "versionType": "git"}, {"lessThan": "eb4f9127a2b8a152743f1ee597627e2f69cb54fe", "status": "affected", "version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "versionType": "git"}, {"lessThan": "eaa948c0e19b1bb2d93262207bca0c3d19cc3406", "status": "affected", "version": "1a70200f404ae210b4f0334e3936e84f8edb6bc8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/target/auth.c", "drivers/nvme/target/core.c", "drivers/nvme/target/nvmet.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "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\nnvmet-auth: Synchronize timeout work during SQ teardown\n\nnvmet_auth_sq_free() cancels auth_expired_work with\ncancel_delayed_work(). If the work has already started, cancellation does\nnot wait for the callback. Transport teardown can consequently free or\nreuse the queue containing struct nvmet_sq while\nnvmet_auth_expired_work() still accesses that SQ.\n\nAdd a teardown-specific helper that synchronously drains the delayed work\nbefore freeing authentication state, and use it from nvmet_sq_destroy().\nKeep the non-synchronous helper for in-band authentication state cleanup,\nwhere the SQ owner remains alive."}], "id": "CVE-2026-89970", "lastModified": "2026-10-19T09:18:43.587", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-16T11:17:07.660", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/664022fa1c93f4eba09ef5ee02411b9709dd7a93"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7555ddd60af72df2862dd8f9b730a9848577edda"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c17c87bde6d6f5252a6a6f0a94b2430164aa28d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c3c126a6142a1335bc8c34a5607c39cf01daf295"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eaa948c0e19b1bb2d93262207bca0c3d19cc3406"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eb4f9127a2b8a152743f1ee597627e2f69cb54fe"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a70200f404ae210b4f0334e3936e84f8edb6bc8,664022fa1c93f4eba09ef5ee02411b9709dd7a93)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a70200f404ae210b4f0334e3936e84f8edb6bc8,c3c126a6142a1335bc8c34a5607c39cf01daf295)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a70200f404ae210b4f0334e3936e84f8edb6bc8,c17c87bde6d6f5252a6a6f0a94b2430164aa28d5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a70200f404ae210b4f0334e3936e84f8edb6bc8,7555ddd60af72df2862dd8f9b730a9848577edda)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a70200f404ae210b4f0334e3936e84f8edb6bc8,eb4f9127a2b8a152743f1ee597627e2f69cb54fe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1a70200f404ae210b4f0334e3936e84f8edb6bc8,eaa948c0e19b1bb2d93262207bca0c3d19cc3406)"}}], "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": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc2,*]"}}], "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": "2026-09-18T04:15:02.517877+00:00", "updated": "2026-09-19T18:15:02.073597+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}