CVE-2026-31417 net/x25: Fix overflow when accumulating packets
An integer overflow in the Linux kernel X.25 protocol implementation can lead to denial of service when accumulating packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-31417?
CVE-2026-31417 is a high-severity vulnerability in Linux kernel, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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()`.
Weakness: CWE-191
Which versions are affected by CVE-2026-31417?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31417?
Apply the vendor's patch.
Is CVE-2026-31417 being exploited?
There is no known exploitation of CVE-2026-31417 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-82700, BELL-CVE-2026-31417, DEBIAN-CVE-2026-31417, GHSA-j4r7-4685-8m4m, ROOT-OS-DEBIAN-11-CVE-2026-31417, ROOT-OS-DEBIAN-12-CVE-2026-31417 and 4 more.