CVE-2026-98789
kernel: bpf: Fix objects stuck in free_by_rcu_ttrace
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 23, 2026
Description
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) memory allocator. When releasing memory, objects queued while a delayed cleanup cycle is already in progress can fail to be reclaimed. A local user can exploit this vulnerability through repeated BPF operations, causing an unbounded memory leak that may lead to a Denial of Service (DoS) via system memory exhaustion.
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-772 · Missing Release of Resource after Effective Lifetime