7.8

CVE-2026-80944: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-80944DEBIAN-CVE-2026-80944
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80944 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11805-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: Detach sync cmd buffer on interrupted wait mwifiex synchronous commands keep the caller-provided data buffer in cmd_node->data_buf. Several callers pass stack-allocated objects there. If wait_event_interruptible_timeout() is interrupted, the caller can return and release that stack object while the firmware command is still the current command. A late firmware response then reaches the normal response handler, which can copy data through cmd_node->data_buf into the stale stack address. This fixes a stack corruption observed during repeated association and disassociation cycles. The panic trace showed the command wait being interrupted immediately before a bad pointer dereference: cmd_wait_q terminated: -512 Unable to handle kernel paging request at virtual address 002c583837384662 Kernel panic - not syncing: stack-protector: Kernel stack is corrupted ... Tainted: [M]=MACHINE_CHECK The fault address decodes as little-endian ASCII: 0x002c583837384662 -> "bF878X,\0" which is a fragment of the VERSION_EXT firmware string exposed as debugfs "verext": w8997o-V4, RF878X, FP92, 16.92.21.p153.7 The same runs also showed corrupted control data containing: 0x2400372e333531 -> "153.7\0$" which is the tail of the same VERSION_EXT string. This points at a late VERSION_EXT response writing through a stale stack-backed data_buf after the interrupted wait returned. After cancelling pending commands on an interrupted or timed-out wait, detach the caller-owned data buffer from the still-current command. This preserves the existing command cancellation behaviour while preventing a late response from writing through a pointer whose lifetime ended with the waiting caller. Tested on an i.MX8MP board using an 88W8997.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 3d026d09b28dda24777129a931634949c75a9181, < 8c67b8c50286e0cb7f18d667e6a37a2ec6e08ff9 | ≥ 3d026d09b28dda24777129a931634949c75a9181, < 9024c7729eb523cf4f3a4203966d3a4aaabf030d | ≥ 3d026d09b28dda24777129a931634949c75a9181, < 9e06c9c8a1f10c55d9bc5d139656d58795e64483 | ≥ 3d026d09b28dda24777129a931634949c75a9181, < f2134d6ff30cd6e1bf63d6b0a5d8e0839f0168b3 | ≥ 3d026d09b28dda24777129a931634949c75a9181, < 20ee9c03f261bf6ac59331e2ca7b46b23646412a | ≥ 3d026d09b28dda24777129a931634949c75a9181, < b1bbeb8970eeb6c6bf3cd5314138103f7b69446d | ≥ 3d026d09b28dda24777129a931634949c75a9181, < d29a165588b6a0cf7a38db5cbd602aef7ef8c658 | ≥ 3d026d09b28dda24777129a931634949c75a9181, < ef06882c7d8a7400b67d0d003b1008093dd589ed | 3.15

3 vendors · 172 products

References

13 links
Show all 13 references