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CVE-2026-80635— wifi: wcn36xx: fix OOB read from short trigger BA firmware response

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： wifi: wcn36xx: 修复由短触发式 BA 固件响应引起的越界读取 固件响应的长度仅与 （20 字节）进行校验，但当 时，会在 处读取一个 22 字节的候选结构体，而未验证响应中是否实际包含该数据。这会导致越界读取过期的堆内存数据，从而破坏 BA 会话状态。 修复方式：添加校验逻辑，确保响应中确实包含候选数据。

CVSS 8.8 · High EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 16be1ac55944412e8d132b1db26f994b368c5742< 04aba50212f9f274e1a726fb3873b5ce8da2d821 affected
16be1ac55944412e8d132b1db26f994b368c5742< c07aa0534d50361183833e3803204044cf1d0476 affected
16be1ac55944412e8d132b1db26f994b368c5742< d0b57bcd0dac6e2c9a3e474ec280e7db0b3edf35 affected
16be1ac55944412e8d132b1db26f994b368c5742< af8f0ea1f0a3a5fb5ed2b8fed3f1501d644597ee affected
16be1ac55944412e8d132b1db26f994b368c5742< d0cafe6ed8d1f6d0097eda31d85f5760d4f359c2 affected
16be1ac55944412e8d132b1db26f994b368c5742< b5e6f21923ca89d90256e7346301056f6502691e affected
4.7 affected
< 4.7 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80635

Vulnerability Information
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Vulnerability Title
wifi: wcn36xx: fix OOB read from short trigger BA firmware response
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix OOB read from short trigger BA firmware response The firmware response length is only checked against sizeof(*rsp) (20 bytes), but when candidate_cnt >= 1, a 22-byte candidate struct is read at buf + 20 without verifying the response contains it. This causes an out-of-bounds read of stale heap data, corrupting the BA session state. Add validation that the response includes the candidate data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/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 16be1ac55944412e8d132b1db26f994b368c5742 ~ 04aba50212f9f274e1a726fb3873b5ce8da2d821 -
Linux Linux 4.7 -

II. Public POCs for CVE-2026-80635

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III. Intelligence Information for CVE-2026-80635

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Patches & Fixes for CVE-2026-80635 (6)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80684 9.3 CRITICAL KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80683 8.8 HIGH Bluetooth: SCO: give the socket its own sco_conn reference
CVE-2026-80692 8.8 HIGH Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks
CVE-2026-80633 8.8 HIGH iommufd: Take dma_resv lock before dma_buf_unpin() in release path

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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