7.7

CVE-2026-90407: linux

CVSS: 7.7v3.1HighReceived
AliasesUBUNTU-CVE-2026-90407DEBIAN-CVE-2026-90407
Published 17-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-90407 is a high (CVSS 7.7) vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
0.18%
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-2026:11893-1

Timeline

  1. 17-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event() There is no policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, so the parse infrastructure does not enforce a minimum length for the event struct. Additionally, the num_vdevs field is taken directly from firmware and used as a loop bound over the vdev_ids array without checking that it fits within the TLV payload. Either condition can cause an out-of-bounds read. Add a TLV policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT so the parse infrastructure enforces a minimum length for the fixed-size event struct. Add a helper ath11k_wmi_tlv_data_len() to recover the payload length of a parsed TLV from the header preceding its data pointer. Use it in ath11k_wmi_process_csa_switch_count_event() to bound num_vdevs before the loop. Compile tested only.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.18%

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

Ubuntu157 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) | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ d5c65159f2895379e11ca13f62feabe93278985d, < f760b7d7e43584d2fa9bffcec1a04e502609f827 | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < 0364926fb4bfb5b798e5fe2785b3023b4f767327 | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < 5de2b8c53714ad58f2fda118cd29ebbe31b38665 | ≥ d5c65159f2895379e11ca13f62feabe93278985d, < 208d7fdb85976a737a715b81d54efaff6703880c | 5.6

3 vendors · 160 products

References

10 links