5.5

CVE-2026-31752: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31752DEBIAN-CVE-2026-31752
Published 01-05-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-31752 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.1% 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
0.17%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 40 · Related 38
MGASA-2026-0108MGASA-2026-0110OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22433-1SUSE-SU-2026:22436-1SUSE-SU-2026:22458-1

Timeline

  1. 01-05-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bridge: br_nd_send: validate ND option lengths br_nd_send() walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option payload. Validate option lengths against the remaining NS option area before advancing, and only read source LLADDR when the option is large enough for an Ethernet address.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.04 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

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

Ubuntu156 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)
Linux2 products
  • linux≥ ed842faeb2bd49256f00485402f3113205f91d30, < 82a42eceec7c6bdb0e0da94c0542a173b7ea57f2 | ≥ ed842faeb2bd49256f00485402f3113205f91d30, < 259466f76f5a2148aff11134e68f4b4c6d52725b | ≥ ed842faeb2bd49256f00485402f3113205f91d30, < ee02d8991fd7bd86ed6ebd0deb4aab53feb0e43a | ≥ ed842faeb2bd49256f00485402f3113205f91d30, < e0bfd6d4dc77ab345b6c65eef0cfe9b2f69085aa | ≥ ed842faeb2bd49256f00485402f3113205f91d30, < c49b9256bbacb6a135654aebd12e4c0e87166b7c | ≥ ed842faeb2bd49256f00485402f3113205f91d30, < 837392a38445729c22e03d3abcf33f07763efd85 | ≥ ed842faeb2bd49256f00485402f3113205f91d30, < e71303a9190496136e240c4f2872b7b0b16027a7 | ≥ ed842faeb2bd49256f00485402f3113205f91d30, < 850837965af15707fd3142c1cf3c5bfaf022299b | 4.15
  • linux_kernel≥ 4.15, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.134 | ≥ 6.7, < 6.12.81 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.12-1

3 vendors · 159 products

References

42 links
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