5.5

CVE-2026-43255: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-43255DEBIAN-CVE-2026-43255
Published 06-05-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-43255 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 38
OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23221-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix WARNING in usb_tx_block The function usb_tx_block() submits cardp->tx_urb without ensuring that any previous transmission on this URB has completed. If a second call occurs while the URB is still active (e.g. during rapid firmware loading), usb_submit_urb() detects the active state and triggers a warning: 'URB submitted while active'. Fix this by enforcing serialization: call usb_kill_urb() before submitting the new request. This ensures the URB is idle and safe to reuse.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.03 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.16%

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) | < 5.15.0-186.196 | < 6.8.0-134.134
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 498525d8358d6d20918787e59736d5b6a021e9fd | ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 2902a9b4415a6bafc9b1e5dd360f065d757a0bb7 | ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 948a39c95d0f8d73722910f8cdb7b6e3e9206232 | ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 5bfb25495e391a1be0db94b15715174fa06b93a1 | ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < b82073564373e68c6ae3a96039fae14cd002a496 | ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 3308c7504e093b22e91a4468470309cee2e26b83 | ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < fc188b44547dea4e7350833171982a6312befde9 | ≥ 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < d66676e6ca96bf8680f869a9bd6573b26c634622 | 2.6.22
  • linux_kernel≥ 2.6.22, < 5.10.252 | ≥ 5.11, < 5.15.202 | ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.6-1

3 vendors · 160 products

References

37 links
Show all 37 references