CVE-2026-98925
kernel: bpf, sockmap: Fix self-redirect copied_seq double-counting
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 30, 2026
Description
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) sockmap subsystem. This flaw allows a local attacker to cause a Denial of Service (DoS) when redirecting network traffic back to the originating socket. The kernel improperly double-counts sequence numbers for received TCP (Transmission Control Protocol) data, resulting in internal state inconsistencies and kernel warnings. Consequently, normal socket communication is disrupted, which may lead to system instability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-617 · Reachable Assertion