8.1

CVE-2026-89524: linux

CVSS: 8.1v3.1HighReceived
AliasesUBUNTU-CVE-2026-89524DEBIAN-CVE-2026-89524
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-89524 is a high (CVSS 8.1) vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.6% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
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 2 · Related 2
OPENSUSE-SU-2026:11880-1SUSE-SU-2026:4687-1

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: ath6kl: clamp assoc request/response lengths before subtracting IE offsets ath6kl_cfg80211_connect_event() subtracts fixed IE offsets from assoc_req_len (-= 4) and assoc_resp_len (-= 6), both u8, with no lower bound. The aggregate check recently added to ath6kl_wmi_connect_event_rx() bounds the declared lengths from above (their sum must fit the received event), but an assoc request/response shorter than its fixed offset still underflows here: the u8 wraps to ~250, and cfg80211_connect_result() / cfg80211_roamed() then treat that wrapped value as the IE length and copy that many bytes out of the small assoc_info buffer to user space via nl80211, disclosing adjacent slab memory. Clamp both lengths to their offsets before subtracting. Found by 0sec (https://0sec.ai) using automated source analysis; the missing lower bound is evident from source. Compile-tested.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

0.00 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.27%

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≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < 225587bdbf4b0eb5265a71ee4dc183561a1857fc | ≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < d337213a889705a69735079606d0b4c672b17605 | ≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < e11d5ae96d5e52cb48fa27c6ad352d766d0322fb | ≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < 6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9 | ≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < e3619bed5da125713b29ac881dc66f5e06606f88 | ≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < e1330d719c047c4d8190a16be034b29fc601a815 | ≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < 8eb73016fb3968cf2db3987a92764563a3af773a | ≥ bdcd81707973cf8aa9305337166f8ee842a050d4, < 3bbd05723d15dd06f0560bcd94fbf9a91b5f5613 | 3.2

3 vendors · 172 products

References

13 links
Show all 13 references