wifi: ath6kl: clamp assoc request/response lengths before subtracting IE offsets (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.27 % · percentile 20 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
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.
References
- https://git.kernel.org/stable/c/225587bdbf4b0eb5265a71ee4dc183561a1857fc
- https://git.kernel.org/stable/c/d337213a889705a69735079606d0b4c672b17605
- https://git.kernel.org/stable/c/e11d5ae96d5e52cb48fa27c6ad352d766d0322fb
- https://git.kernel.org/stable/c/6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9
- https://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88
- https://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815
- https://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a
- https://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | Linux |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-76430
- GCVE · GCVE-0-2026-89524
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1335 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected bdcd81707973cf8aa9305337166f8ee842a050d4 < 225587bdbf4b0eb5265a71ee4dc183561a1857fc ; affected bdcd81707973cf8aa9305337166f8ee842a050d4 < d337213a889705a69735079606d0b4c672b17605 ; affected bdcd81707973cf8aa9305337166f8ee842a050d4 < e11d5ae96d5e52cb48fa27c6ad352d766d0322fb ; affected bdcd81707973cf8aa9305337166f8ee842a050d4 < 6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9 ; affected bdcd81707973cf8aa9305337166f8ee842a050d4 < e3619bed5da125713b29ac881dc66f5e06606f88 ; affected bdcd81707973cf8aa9305337166f8ee842a050d4 < e1330d719c047c4d8190a16be034b29fc601a815 |
| Linux · Linux | affected 3.2 ; unaffected 0 < 3.2 ; unaffected 5.10.270 ≤ 5.10.* ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |