8.8

CVE-2026-43110: wifi: brcmfmac: validate bsscfg indices in IF events

Modified
AliasesUBUNTU-CVE-2026-43110DEBIAN-CVE-2026-43110CGA-29m2-39ph-583r
Published 06-05-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-43110 is a high (CVSS 8.8) Improper Validation of Array Index vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · -0.14 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 165 · Related 153
OPENSUSE-SU-2026:21555-1RHSA-2026:21556RHSA-2026:21557RHSA-2026:23237RHSA-2026:24343RHSA-2026:25218

Showing 100 of 166.

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF events brcmf_fweh_handle_if_event() validates the firmware-provided interface index before it touches drvr->iflist[], but it still uses the raw bsscfgidx field as an array index without a matching range check. Reject IF events whose bsscfg index does not fit in drvr->iflist[] before indexing the interface array. [add missing wifi prefix]

CVSS metrics

5 scores · 5 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

Decrease -0.14 pp

From 0.41% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard6 products
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.24-r1
  • linux-gcp-6.18< 6.18.31-r0
  • linux-qemu-6.18< 6.18.31-r0
  • linux-qemu-6.18-bootc-boot-installed< 6.18.31-r0
Linux2 products
  • linux≥ 2880b86859967af710c72f7d34fb421a86a71e22, < b329fbcf075949a038045d8e9b86ae3d5bbd8a54 | ≥ 2880b86859967af710c72f7d34fb421a86a71e22, < 2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af734 | ≥ 2880b86859967af710c72f7d34fb421a86a71e22, < 9c81bcc2c695e0082012a2a3d36a0eefaa51579c | ≥ 2880b86859967af710c72f7d34fb421a86a71e22, < 3ec7437e9d11374105c2c4e47ae671537729d7e6 | ≥ 2880b86859967af710c72f7d34fb421a86a71e22, < 9fca68c2512a362cad258e4df12a307bb2ee4b8e | ≥ 2880b86859967af710c72f7d34fb421a86a71e22, < 1ae1e1caa428844e481231f6dbe9b4f475f1d52d | ≥ 2880b86859967af710c72f7d34fb421a86a71e22, < b427c2b05222db36d32ee141609de6128e9091bb | ≥ 2880b86859967af710c72f7d34fb421a86a71e22, < 304950a467d83678bd0b0f46331882e2ac23b12d | 3.9
  • linux_kernel≥ 3.9, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1

4 vendors · 166 products

References

43 links
Show all 43 references