7.8

CVE-2026-43248: linux Out-of-bounds Write

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-43248DEBIAN-CVE-2026-43248
Published 06-05-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-43248 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
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 25 · Related 23
OPENSUSE-SU-2026:21388-1RHSA-2026:67470RHSA-2026:67471SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22809-1

Timeline

  1. 06-05-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: vhost: move vdpa group bound check to vhost_vdpa Remove duplication by consolidating these here. This reduces the posibility of a parent driver missing them. While we're at it, fix a bug in vdpa_sim where a valid ASID can be assigned to a group equal to ngroups, causing an out of bound write.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

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

Affected systems

Ubuntu130 products
  • linux< 6.8.0-134.134 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1060.63 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ bda324fd037a6b0d44da5699574ce741ca161bc4, < 566899af053246406f2faf931044d2b0af8f34d2 | ≥ bda324fd037a6b0d44da5699574ce741ca161bc4, < ddb57354634b6ba851b79da45f1de42c646f27d0 | ≥ bda324fd037a6b0d44da5699574ce741ca161bc4, < 7441d35d14d9a3d66d925d90cb73c75394e6d454 | ≥ bda324fd037a6b0d44da5699574ce741ca161bc4, < 406db68f9cb976a8ddfafd631197264f2307e9c9 | ≥ bda324fd037a6b0d44da5699574ce741ca161bc4, < cd025c1e876b4e262e71398236a1550486a73ede | 5.19
  • linux_kernel≥ 5.19, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.85-1 | < 6.19.6-1

3 vendors · 133 products

References

21 links
Show all 21 references