CVE-2025-21997 — Integer Overflow or Wraparound in Linux
Severity
5.5MEDIUMNVD
OSV5.9OSV4.7
EPSS
0.1%
top 76.27%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedApr 3
Latest updateOct 15
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6