5.5

CVE-2026-31518: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31518DEBIAN-CVE-2026-31518
Published 22-04-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-31518 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-2026:20965-1SUSE-SU-2026:22099-1SUSE-SU-2026:22108-1SUSE-SU-2026:22112-1

Timeline

  1. 22-04-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: esp: fix skb leak with espintcp and async crypto When the TX queue for espintcp is full, esp_output_tail_tcp will return an error and not free the skb, because with synchronous crypto, the common xfrm output code will drop the packet for us. With async crypto (esp_output_done), we need to drop the skb when esp_output_tail_tcp returns an error.

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

Affected systems

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < aca3ad0c262f54a5b5c95dda80a48365997d1224 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 41aafca57de4a4c026701622bd4648f112a9edcd | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 4820847e036ff1035b01b69ad68dfc17e7028fe9 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 6a3ec6efbc4f90e0ccb2e71574f07351f19996f4 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < df6f995358dc1f3c42484f5cfe241d7bd3e1cd15 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 88d386243ed374ac969dabd3bbc1409a31d81818 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 6aa9841d917532d0f2d932d1ff2f3a94305aaf47 | ≥ e27cca96cd68fa2c6814c90f9a1cfd36bb68c593, < 0c0eef8ccd2413b0a10eb6bbd3442333b1e64dd2 | 5.6
  • linux_kernel≥ 5.6, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.131 | ≥ 6.7, < 6.12.80 | ≥ 6.13, < 6.18.21 | ≥ 6.19, < 6.19.11 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.11-1

3 vendors · 148 products

References

43 links
Show all 43 references