What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-13 · updated 2026-10-15
• Weakness: CWE-191

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()`.

Affected products

• Linux kernel: from 2.6.12.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.134; from 6.7 before 6.12.81; from 6.13 before 6.18.22 — fixed in 5.10.253, 5.15.203, 6.1.168, 6.12.81, 6.18.22, 6.19.12

How to fix

Upgrade to a fixed version: Linux kernel 5.10.253, 5.15.203, 6.1.168, 6.12.81. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1734bd85c5e0a7a801295b729efb56b009cb8fc3
• https://git.kernel.org/stable/c/4e2d1bcef78d21247fe8fef13bc7ed95885df2b5
• https://git.kernel.org/stable/c/6e568835ea54a3e1d08e310e34f95d434e739477
• https://git.kernel.org/stable/c/798d613afb64b01a203f448fb0f43c37c6afe79d
• https://git.kernel.org/stable/c/8c92969c197b91c134be27dc3afb64ab468853a9
• https://git.kernel.org/stable/c/96fc16370b0bceb289c7e0479bd0540b81e257aa
• https://git.kernel.org/stable/c/a1822cb524e89b4cd2cf0b82e484a2335496a6d9
• https://git.kernel.org/stable/c/f953f11ccf4afe6feb635c08145f4240d9a6b544
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html
• https://cert-portal.siemens.com/productcert/html/ssa-457936.html

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