7.5

CVE-2026-31417: net/x25: Fix overflow when accumulating packets

Modified
AliasesUBUNTU-CVE-2026-31417DEBIAN-CVE-2026-31417
Published 13-04-2026Last modified 15-10-2026

Vulnerability summary

CVE-2026-31417 is a high (CVSS 7.5) Integer Underflow (Wrap or Wraparound) vulnerability in linux. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 39% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · -0.38 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 31 · Related 29
MGASA-2026-0108MGASA-2026-0110SUSE-SU-2026:21834-1SUSE-SU-2026:2238-1USN-8567-1USN-8574-1

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: net/x25: Fix overflow when accumulating packets Add a check to ensure that `x25_sock.fraglen` does not overflow. The `fraglen` also needs to be resetted when purging `fragment_queue` in `x25_clear_queues()`.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

Decrease -0.38 pp

From 0.83% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu157 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≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 96fc16370b0bceb289c7e0479bd0540b81e257aa | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 798d613afb64b01a203f448fb0f43c37c6afe79d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6e568835ea54a3e1d08e310e34f95d434e739477 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1734bd85c5e0a7a801295b729efb56b009cb8fc3 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4e2d1bcef78d21247fe8fef13bc7ed95885df2b5 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8c92969c197b91c134be27dc3afb64ab468853a9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f953f11ccf4afe6feb635c08145f4240d9a6b544 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a1822cb524e89b4cd2cf0b82e484a2335496a6d9 | 2.6.12
  • linux_kernel≥ 2.6.12.1, < 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 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5 | 2.6.12:rc6 | 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 · 160 products

References

43 links
Show all 43 references