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CVE-2026-80890— sctp: reject stale cookies with mismatched verification tags

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.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sctp_unpack_cookie函数在关联已存在时跳过cookie过期检查，导致验证标签不匹配的过期cookie被接受，可能允许攻击者重放过期cookie重新启动SCTP关联。

AI Predicted 4.5 Difficulty: Hard EPSS 0.18% · P8

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f6e3cc296372accad4ee57405195021231ef4bcb affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c151daba0ceb1fb068a215b07de89fb1eb5f87bc affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 817cffdbdbdf50e1f2b016599d1897de3ca54964 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 61baa5020b0afb41bfd97f8f6ce5e336c4a4546e affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c68557a49e960dbcdede22c7a9b488603078b8b4 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a0d1693923f41d6f49083aa2446686aed09d1d79 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 35c279113498d19a8734e2aae67b951b9b20f634 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9d8da8e0a9bce4a340af60dd0446bc7eb8d07587 affected
… +10 more rows
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I. Basic Information for CVE-2026-80890

Vulnerability Information
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Vulnerability Title
sctp: reject stale cookies with mismatched verification tags
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sctp: reject stale cookies with mismatched verification tags sctp_unpack_cookie() skips cookie expiration checks whenever an association already exists. This is broader than the exception in RFC 9260 Section 5.2.4. For an existing association, Section 5.2.4 permits an expired State Cookie only when both Verification Tags in the cookie match the current association. Otherwise, the packet SHOULD be discarded and a Stale Cookie ERROR MUST be sent. The broad check lets an expired Action A restart cookie reach sctp_sf_do_dupcook_a(). In a runtime test with the default 60 second cookie lifetime, replaying such a cookie after 65 seconds returned a COOKIE-ACK and restarted the association. Check cookie expiration unless both Verification Tags match. This preserves the Action D exception for a lost COOKIE ACK while rejecting expired cookies in all other cases.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于sctp_unpack_cookie函数在关联已存在时跳过cookie过期检查，导致验证标签不匹配的过期cookie被接受，可能允许攻击者重放过期cookie重新启动SCTP关联。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ f6e3cc296372accad4ee57405195021231ef4bcb -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-80890

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III. Intelligence Information for CVE-2026-80890

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Patches & Fixes for CVE-2026-80890 (8)

Same Patch Batch · Linux · 2026-09-04 · 156 CVEs total

CVE-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure
CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
CVE-2026-80858 fuse: publish io-uring queues with release semantics
CVE-2026-80859 fuse: fix missing barrier when checking io-uring readiness
CVE-2026-80860 fuse: fix race between interrupt and resend
CVE-2026-80861 usb: xhci: bail out of setup if the controller is inaccessible
CVE-2026-80862 nvme-tcp: fix usage of page_frag_cache
CVE-2026-80863 RDMA/rxe: Fix OOB in free_rd_atomic_resources()
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()
CVE-2026-80873 KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
CVE-2026-80871 crypto: xilinx-trng - Remove crypto_rng interface
CVE-2026-80870 drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
CVE-2026-80867 alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80854 usb: gadget: f_tcm: keep port count until LUN teardown completes
CVE-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80890

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