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CVE-2026-99059— wireguard: noise: reject response consumption after intermediate initiation

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，以下漏洞已被修复： WireGuard：Noise 协议——在中间握手发起之后拒绝响应消息的处理 当同一响应消息被接收两次时，两个线程可能同时开始处理该消息。第一个线程（A）开始执行；在其运行期间，第二个线程（B）已部分执行。在 B 进行缓慢的密码学计算，甚至阻塞在 调用时，线程 A 完成执行。随后，一个已排队的握手发起操作在线程 C 中运行，该操作同样获取了 锁。该握手发起创建成功，将状态重置为“等待响应”，并调用 。此时，线程 B 恢复执行（要么因其计算已完成，要么因最终获得了 锁）。线

CVSS 7.7 · High EPSS 0.44% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux e7096c131e5161fa3b8e52a650d7719d2857adfd< fb5ce4c7790c3eeec820302d08d70ecf46af4295 affected
e7096c131e5161fa3b8e52a650d7719d2857adfd< c76a80db593096edf2b3b3972f58b6342a8c6c04 affected
e7096c131e5161fa3b8e52a650d7719d2857adfd< 4d64a3d6e96aa78619c9c29ffde309794974588a affected
e7096c131e5161fa3b8e52a650d7719d2857adfd< 3bec3d32c2a3afd164fc87f95457df2cf9049c20 affected
e7096c131e5161fa3b8e52a650d7719d2857adfd< d0305f8d90029556260c6824b61c493c424eba9e affected
5.6 affected
< 5.6 unaffected
6.6.160≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-99059

Vulnerability Information
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Vulnerability Title
wireguard: noise: reject response consumption after intermediate initiation
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wireguard: noise: reject response consumption after intermediate initiation Two threads begin processing the identical response message, received twice. The first thread, A, runs. While it's running, the second one, B, gets partway through, and during that slow calculation, or even while blocking on down_write(), A completes and then also a handshake initiation that's already been queued up runs in thread C, which itself takes that same down_write(). The handshake initiation creation succeeds, and sets the state back to waiting-for-response, and calls up_write(), at which point thread B resumes, because either its finished its calculations or was finally allowed to acquire down_write(). Thread B then copies the state back to the peer, and begins a new session, using that state, which is the same session as the one made in thread A. Thread A Thread B Thread C down_read() sA = handshake->state memcpy(cA, handshake->crypto) up_read() if (sA != 1) goto fail slow_crypto(cA) down_read() sB = handshake->state memcpy(cB, handshake->crypto) up_read() if (sB != 1) goto fail slow_crypto(cB) down_write() if (sA != handshake->state) goto fail memcpy(handshake->crypto, cA) handshake->state = 2 up_write() down_write() if (handshake->state != 2) goto fail derive_session(handshake->crypto) up_write() down_write() slow_crypto(handshake->crypto) handshake->state = 1 up_write() down_write() if (sB != handshake->state) goto fail memcpy(handshake->crypto, cB) handshake->state = 2 up_write() down_write() if (handshake->state != 2) goto fail derive_session(handshake->crypto) up_write() This seems basically impossible to hit in a meaningful way in practice, but ensure that it absolutely cannot happen by comparing the ephemeral private key that's on the stack with the latest one that the peer's handshake state has.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
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 e7096c131e5161fa3b8e52a650d7719d2857adfd ~ fb5ce4c7790c3eeec820302d08d70ecf46af4295 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-99059

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III. Intelligence Information for CVE-2026-99059

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Patches & Fixes for CVE-2026-99059 (4)

Same Patch Batch · Linux · 2026-10-23 · 217 CVEs total

CVE-2026-98959 9.8 CRITICAL btrfs: fix xattr replace when multiple xattrs are packed in the same item
CVE-2026-99078 9.8 CRITICAL net/mlx5e: Prevent stale XSK buffer release on MPWQE refill retry
CVE-2026-99079 9.8 CRITICAL net/mlx5e: Prevent stale XSK buffer release on refill retry
CVE-2026-98988 8.8 HIGH namespace: keep covered mounts covered in OPEN_TREE_NAMESPACE
CVE-2026-99083 8.8 HIGH ksmbd: fix heap out-of-bounds write in krb5_authenticate()
CVE-2026-99082 8.8 HIGH KVM: x86: Use active memslots for the per-vCPU MMIO cache
CVE-2026-98981 8.8 HIGH namespace: unhash a dentry before detaching the mounts on it
CVE-2026-98980 8.8 HIGH namei: don't reveal overmounted entries in refwalk
CVE-2026-98870 8.8 HIGH ksmbd: remove stale channels from all sessions on teardown
CVE-2026-98978 8.4 HIGH namespace: never expire a locked mount
CVE-2026-99042 8.4 HIGH io_uring/net: populate CONNECT filter fields for 24-byte sockaddr_in6
CVE-2026-98968 8.1 HIGH amt: send the relay's General Query directly from the receive path
CVE-2026-99064 8.1 HIGH cipso: adjust cached option offsets when removing CIPSO
CVE-2026-99014 7.8 HIGH Bluetooth: hci_sync: Fix command skb lifetime during scan setup
CVE-2026-98999 7.8 HIGH drm/xe: Fix stale pinned_link entry when fb-pin performs the final unpin
CVE-2026-99016 7.8 HIGH riscv: futex: untag the user pointer before the atomic access
CVE-2026-99018 7.8 HIGH riscv: entry: gate shadow call stack reload on sstatus.SPP, not tp
CVE-2026-99051 7.8 HIGH fsverity: RCU-delay the freeing of struct fsverity_info
CVE-2026-99054 7.8 HIGH tipc: destroy topsrv workqueues before closing connections
CVE-2026-99053 7.8 HIGH tipc: hold a reference to nodes found by link name

Showing top 20 of 217 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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