What’s Vulnerable › Vulnerabilities

CVE-2025-21997: xsk: fix an integer overflow in xp_create_and_assign_umem()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-03 · updated 2026-06-17
• Weakness: CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: xsk: fix an integer overflow in xp_create_and_assign_umem() Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lead to two different XDP buffers pointing to the same memory area. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

Affected products

• Linux kernel: from 5.16 before 6.1.132; from 6.2 before 6.6.85; from 6.7 before 6.12.21; from 6.13 before 6.13.9; 6.14-rc1, 6.14-rc2, 6.14-rc3, 6.14-rc4, 6.14-rc5, 6.14-rc6 (+1) — fixed in 6.1.132, 6.12.21, 6.13.9, 6.6.85

How to fix

Upgrade to a fixed version: Linux kernel 6.1.132, 6.12.21, 6.13.9, 6.6.85. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/130290f44bce0eead2b827302109afc3fe189ddd
• https://git.kernel.org/stable/c/205649d642a5b376724f04f3a5b3586815e43d3b
• https://git.kernel.org/stable/c/559847f56769037e5b2e0474d3dbff985b98083d
• https://git.kernel.org/stable/c/b7b4be1fa43294b50b22e812715198629806678a
• https://git.kernel.org/stable/c/c7670c197b0f1a8726ad5c87bc2bf001a1fc1bbd
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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