5.5

CVE-2026-53238: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-53238DEBIAN-CVE-2026-53238CGA-2p5f-m3pj-5ccq
Published 25-06-2026Last modified 25-06-2026
Open JSON

Vulnerability summary

CVE-2026-53238 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.8% 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
0.12%
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 36 · Related 36
MGASA-2026-0312OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: netlabel: validate unlabeled address and mask attribute lengths netlbl_unlabel_addrinfo_get() used the address attribute length to determine whether the attribute data could be read as an IPv4 or IPv6 address, but did not independently validate the corresponding mask attribute length. A crafted Generic Netlink request could therefore provide a valid IPv4/IPv6 address attribute with a shorter mask attribute, which would later be read as a full struct in_addr or struct in6_addr. NLA_BINARY policy lengths are maximum lengths by default, so use NLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask attributes. This rejects short attributes during policy validation and also exposes the exact length requirements through policy introspection.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.12%

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

Ubuntu168 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-146.146 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1066.69 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard6 products
  • linux-azure-6.18< 6.18.38-r0
  • linux-gcp-6.18< 6.18.38-r0
  • linux-gcp-6.18-bootc-boot-installed< 6.18.38-r0
  • linux-qemu-6.18< 6.18.38-r0
  • linux-qemu-6.18-bootc-boot-installed< 6.18.38-r0
Linux2 products
  • linux≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < 975a84fd741440853380d37465b6e226cf47254c | ≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < 672f0f3b8f875ffe6525a37847eafa7648c4c0c6 | ≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < 95bda3eac0b1454c2cee98d58d9ba6dd8391e843 | ≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < 07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6 | ≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < 71c52da13c3737493b42d20d9f33de34e03b3156 | ≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < 0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8 | ≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < ccfe292a966079c61ea68a2da303b2a336170993 | ≥ 8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd, < 9772589b57e44aedc240211c5c3f7a684a034d3a | 2.6.25
  • linux_kernel≥ 2.6.25, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6 | 7.1:rc7
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.13-1

4 vendors · 177 products

References

36 links
Show all 36 references