CVE-2026-90398

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. A secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath11k: fix stride mismatch in mac_phy_caps_parse()

Currently, in ath11k_wmi_tlv_mac_phy_caps_parse(), kcalloc() sizes the mac_phy_caps buffer as tot_phy_id * len, where len is clamped to min(firmware_len, sizeof(struct wmi_mac_phy_capabilities)). The subsequent memcpy() destination advances by sizeof(full struct) per slot via C pointer arithmetic, not by the clamped len. When firmware sends short TLVs, the second and later slots are written past the end of the allocation.

The reader in ath11k_pull_mac_phy_cap_svc_ready_ext() also indexes the buffer with full-struct pointer arithmetic, so the allocation must match that stride.

Fix by using kzalloc_objs(), which derives the element size from the pointer type, making allocation size and pointer stride provably consistent regardless of what len the firmware provides.

Compile tested only.

CVSS v3
8.4
EG Score
8.4HIGHhigh confidence
EG Risk
42
EG Risk 42/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity84% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 17, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Sep 18, 2026
Patch available.
generic

wifi: ath11k: fix stride mismatch in mac_phy_caps_parse() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7a246c72132eb943b5844ba79dad597b47429dba
generic

wifi: ath11k: fix stride mismatch in mac_phy_caps_parse() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/acff2713c3212ade15051e7b421f15c89927e70f
generic

wifi: ath11k: fix stride mismatch in mac_phy_caps_parse() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/75185e2b214e842b7e0af29e5d1fef155662b8b1
generic

wifi: ath11k: fix stride mismatch in mac_phy_caps_parse() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bbb3b3334a9ed850c5b332eedea107796e691237

Vendor Advisories for CVE-2026-90398(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 26× in last 7d / 74× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 08:26 UTCEG score recompute
  2. 2026-10-05 08:26 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 21:05 UTCGHSA enrichment
  5. 2026-10-04 09:42 UTCGHSA enrichment
  6. 2026-10-03 22:20 UTCEG score recompute
  7. 2026-10-03 22:20 UTCGHSA enrichment
  8. 2026-10-03 10:59 UTCGHSA enrichment
  9. 2026-10-02 23:38 UTCEG score recompute
  10. 2026-10-02 23:38 UTCGHSA enrichment
  11. 2026-10-02 12:17 UTCGHSA enrichment
  12. 2026-10-02 00:08 UTCEG score recompute
  13. 2026-10-02 00:08 UTCGHSA enrichment
  14. 2026-10-01 19:51 UTCEPSS rescore
  15. 2026-10-01 12:47 UTCGHSA enrichment
  16. 2026-10-01 01:27 UTCEG score recompute
  17. 2026-10-01 01:27 UTCGHSA enrichment
  18. 2026-09-30 15:04 UTCEPSS rescore
  19. 2026-09-30 14:07 UTCGHSA enrichment
  20. 2026-09-30 02:46 UTCGHSA enrichment
  21. 2026-09-29 15:26 UTCEG score recompute
  22. 2026-09-29 15:26 UTCGHSA enrichment
  23. 2026-09-29 04:06 UTCEG score recompute
  24. 2026-09-29 04:06 UTCGHSA enrichment
  25. 2026-09-28 16:45 UTCEG score recompute
Show 49 more
  1. 2026-09-28 16:45 UTCGHSA enrichment
  2. 2026-09-28 13:52 UTCEPSS rescore
  3. 2026-09-28 13:52 UTCEPSS rescore
  4. 2026-09-28 05:24 UTCGHSA enrichment
  5. 2026-09-27 18:04 UTCEG score recompute
  6. 2026-09-27 18:04 UTCGHSA enrichment
  7. 2026-09-27 13:49 UTCEPSS rescore
  8. 2026-09-27 06:44 UTCGHSA enrichment
  9. 2026-09-26 19:23 UTCEG score recompute
  10. 2026-09-26 19:23 UTCGHSA enrichment
  11. 2026-09-26 15:59 UTCEPSS rescore
  12. 2026-09-26 08:02 UTCEG score recompute
  13. 2026-09-26 08:02 UTCGHSA enrichment
  14. 2026-09-25 20:42 UTCGHSA enrichment
  15. 2026-09-25 09:17 UTCGHSA enrichment
  16. 2026-09-24 21:57 UTCEG score recompute
  17. 2026-09-24 21:57 UTCGHSA enrichment
  18. 2026-09-24 14:04 UTCEPSS rescore
  19. 2026-09-24 10:37 UTCGHSA enrichment
  20. 2026-09-23 23:16 UTCEG score recompute
  21. 2026-09-23 23:15 UTCGHSA enrichment
  22. 2026-09-23 17:54 UTCEPSS rescore
  23. 2026-09-23 11:53 UTCGHSA enrichment
  24. 2026-09-23 00:33 UTCEG score recompute
  25. 2026-09-23 00:33 UTCGHSA enrichment
  26. 2026-09-22 16:01 UTCEPSS rescore
  27. 2026-09-22 13:12 UTCGHSA enrichment
  28. 2026-09-22 01:52 UTCEG score recompute
  29. 2026-09-22 01:52 UTCGHSA enrichment
  30. 2026-09-21 21:09 UTCEPSS rescore
  31. 2026-09-21 14:32 UTCGHSA enrichment
  32. 2026-09-21 03:12 UTCEG score recompute
  33. 2026-09-21 03:12 UTCGHSA enrichment
  34. 2026-09-20 20:16 UTCEPSS rescore
  35. 2026-09-20 15:51 UTCGHSA enrichment
  36. 2026-09-20 04:31 UTCGHSA enrichment
  37. 2026-09-19 17:11 UTCEG score recompute
  38. 2026-09-19 17:11 UTCGHSA enrichment
  39. 2026-09-19 05:50 UTCEG score recompute
  40. 2026-09-19 05:50 UTCGHSA enrichment
  41. 2026-09-18 19:28 UTCEPSS rescore
  42. 2026-09-18 18:30 UTCEG score recompute
  43. 2026-09-18 18:30 UTCGHSA enrichment
  44. 2026-09-18 18:01 UTCEG score recompute▲ 8.40
  45. 2026-09-18 18:01 UTCGHSA enrichment
  46. 2026-09-18 17:59 UTCMITRE cvelistV5CVSS v3 → 8.4 · severity → HIGH
  47. 2026-09-17 17:24 UTCNVD update
  48. 2026-09-17 16:24 UTCEG score recompute
  49. 2026-09-17 16:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90398?
CVE-2026-90398 is a high vulnerability published on September 17, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix stride mismatch in macphycaps_parse() Currently, in ath11kwmitlvmacphycapsparse(), kcalloc() sizes the macphycaps buffer as totphyid * len, where len is clamped to min(firmwarelen, sizeof(struct…
When was CVE-2026-90398 disclosed?
CVE-2026-90398 was first published on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90398 actively exploited?
CVE-2026-90398 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90398?
CVE-2026-90398 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-90398?
A fix for CVE-2026-90398 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-90398 are linked in the Vendor Advisories panel on this page.

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