wifi: mt76: add wcid publish check in mt76_sta_add (CVE-2026-63832) | HOL Guard CVE

High · CVSS 8.8CVE-2026-63832

wifi: mt76: add wcid publish check in mt76_sta_add

Answer in brief

CVE-2026-63832 records a High severity (CVSS 8.8) vulnerability in wifi: mt76: add wcid publish check in mt76_sta_add. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 19, 2026Updated Aug 17, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=4911e4cb157cf87d5bdb3fa8e0c200032443371e <3c499851753a24d2e148d4e9ca51764c0c51554e \|\| >=4911e4cb157cf87d5bdb3fa8e0c200032443371e <55e014aaec650ede08b693ba59c8d0443f13f11c \|\| >=4911e4cb157cf87d5bdb3fa8e0c200032443371e <20b126920a259df4d7dcae19fcfe2c57a74d6b2e \|\| c9389e3f9453ec2d710e61830eafedddfd561226 \|\| 57d3f833087942ded1a8765b1b361454d3d39e8f \|\| >=6.12.13 <6.13 \|\| >=6.13.2 <6.14	3c499851753a24d2e148d4e9ca51764c0c51554e, 55e014aaec650ede08b693ba59c8d0443f13f11c, 20b126920a259df4d7dcae19fcfe2c57a74d6b2e, 6.13, 6.14
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 3c499851753a24d2e148d4e9ca51764c0c51554e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: add wcid publish check in mt76_sta_add Since mt7925_mac_sta_add publishes wcid, add publish check in mt76_sta_add to avoid reinitializing the wcid->poll_list. Found dev->sta_poll_list corruption when using mt7925 and 7.1-rc4. According to the corruption information, prev->next was changed to itself. wlan0: disconnect from AP 90:fb:5d:94:8b:e3 for new auth to 90:fb:5d:94:8b:e2 wlan0: authenticate with 90:fb:5d:94:8b:e2 (local address=84:9e:56:9c:7e:6b) wlan0: send auth to 90:fb:5d:94:8b:e2 (try 1/3) slab kmalloc-8k start ffff8c80958a6000 pointer offset 4160 size 8192 list_add corruption. prev->next should be next (ffff8c808a7488f8), but was ffff8c80958a7040. (prev=ffff8c80958a7040). mt76_wcid_add_poll+0x95/0xd0 [mt76] mt7925_mac_add_txs.part.0+0xa5/0xe0 [mt7925_common] mt7925_rx_check+0xa7/0xc0 [mt7925_common] mt76_dma_rx_poll+0x50d/0x790 [mt76] mt792x_poll_rx+0x52/0xe0 [mt792x_lib]

Quoted source text, attributed separately from HOL analysis.