5.5

CVE-2026-31418: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31418DEBIAN-CVE-2026-31418
Published 13-04-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-31418 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.7% 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 32 · Related 41
MGASA-2026-0108MGASA-2026-0110OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1

Timeline

  1. 13-04-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: drop logically empty buckets in mtype_del mtype_del() counts empty slots below n->pos in k, but it only drops the bucket when both n->pos and k are zero. This misses buckets whose live entries have all been removed while n->pos still points past deleted slots. Treat a bucket as empty when all positions below n->pos are unused and release it directly instead of shrinking it further.

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 21-09-2026

21-09-202621-10-2026
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

Ubuntu153 products
  • linux< 5.4.0-233.253 | < 5.15.0-185.195 | < 6.8.0-134.134 | < 6.17.0-40.40
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1161.172 | < 5.15.0-1111.118 | < 6.8.0-1060.63 | < 6.17.0-1019.19
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < c098ff857e7ca923539164af5b3c2fe3e8f8afaf | ≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < 58f3a14826d4e6b0d5421f1a64be280b48601ea2 | ≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb | ≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < 6cea34d7ec6829b62f521a37a287f670144a2233 | ≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < b7eef00f08b92b0b9efe8ae0df6d0005e6199323 | ≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < 68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4 | ≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < ceacaa76f221a6577aba945bb8873c2e640aeba4 | ≥ 8af1c6fbd9239877998c7f5a591cb2c88d41fb66, < 9862ef9ab0a116c6dca98842aab7de13a252ae02 | 6c717726f341fd8f39a3ec2dcf5d98d9d28a2769 | d2997d64dfa65082236bca1efd596b6c935daf5e | ≥ 5.4.24, < 5.5 | ≥ 5.5.8, < 5.6 | 5.6
  • linux_kernel≥ 5.4.24, < 5.5 | ≥ 5.5.8, < 5.6 | ≥ 5.6.1, < 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 | 5.6 | 5.6:rc4 | 5.6:rc5 | 5.6:rc6 | 5.6:rc7 | 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 · 156 products

References

46 links
Show all 46 references