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CVE-2026-89970— nvmet-auth: Synchronize timeout work during SQ teardown

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： nvmet-auth：在 SQ 拆除过程中同步处理超时工作 使用 来取消 。如果该工作项已经开始执行，取消操作并不会等待其回调函数完成。这可能导致传输层拆除过程中，在 仍可能访问该 SQ（包含 ）时，对应的队列已被释放或复用，从而引发竞态条件。 修复方案：新增一个专门用于拆除阶段的辅助函数，在释放认证状态前同步地“排空”（drain）延迟工作项，并在 中调用该辅助函数。同时，保留原有的非同步辅助函数用于带内（in-band）认证状态清理，因为在此场景下 SQ 所有者仍然存活

CVSS 9.8 · Critical EPSS 0.78% · P54

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 1a70200f404ae210b4f0334e3936e84f8edb6bc8< 664022fa1c93f4eba09ef5ee02411b9709dd7a93 affected
1a70200f404ae210b4f0334e3936e84f8edb6bc8< c3c126a6142a1335bc8c34a5607c39cf01daf295 affected
1a70200f404ae210b4f0334e3936e84f8edb6bc8< c17c87bde6d6f5252a6a6f0a94b2430164aa28d5 affected
1a70200f404ae210b4f0334e3936e84f8edb6bc8< 7555ddd60af72df2862dd8f9b730a9848577edda affected
1a70200f404ae210b4f0334e3936e84f8edb6bc8< eb4f9127a2b8a152743f1ee597627e2f69cb54fe affected
1a70200f404ae210b4f0334e3936e84f8edb6bc8< eaa948c0e19b1bb2d93262207bca0c3d19cc3406 affected
6.0 affected
< 6.0 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-89970

Vulnerability Information
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Vulnerability Title
nvmet-auth: Synchronize timeout work during SQ teardown
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: Synchronize timeout work during SQ teardown nvmet_auth_sq_free() cancels auth_expired_work with cancel_delayed_work(). If the work has already started, cancellation does not wait for the callback. Transport teardown can consequently free or reuse the queue containing struct nvmet_sq while nvmet_auth_expired_work() still accesses that SQ. Add a teardown-specific helper that synchronously drains the delayed work before freeing authentication state, and use it from nvmet_sq_destroy(). Keep the non-synchronous helper for in-band authentication state cleanup, where the SQ owner remains alive.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1a70200f404ae210b4f0334e3936e84f8edb6bc8 ~ 664022fa1c93f4eba09ef5ee02411b9709dd7a93 -
Linux Linux 6.0 -

II. Public POCs for CVE-2026-89970

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III. Intelligence Information for CVE-2026-89970

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Other References for CVE-2026-89970 (6)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter
CVE-2026-89918 9.3 CRITICAL KVM: arm64: Correctly handle end of VA space TLBI invalidation

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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