PT-2025-16699 · Linux+4 · Linux Kernel+4
Published
2025-04-03
·
Updated
2026-01-21
·
CVE-2025-22059
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to the Linux kernel's UDP implementation, where multiple wraparounds of
sk->sk rmem alloc can occur. This happens when sk->sk rcvbuf is set to a large value, such as INT MAX, and the size of incoming packets is added to sk->sk rmem alloc unconditionally, resulting in integer overflow. This allows a single socket to have packets up to net.core.udp mem[1]. The problem was introduced by a commit that removed a boundary check for INT MAX. A fix would involve capping the right operand by INT MAX or defining rmem and rcvbuf as unsigned integers and checking skb->truesize only when rcvbuf is large enough.Recommendations
To resolve the issue, consider updating the Linux kernel to a version that includes the fix for the
udp: Fix multiple wraparounds of sk->sk rmem alloc vulnerability. As a temporary workaround, restrict the use of large sk->sk rcvbuf values and monitor socket memory allocation to minimize the risk of exploitation. Additionally, consider disabling or limiting the use of UDP sockets with large receive buffers until a patch is available.Exploit
Fix
Integer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linuxmint
Linux Kernel
Red Os
Ubuntu