Use of uninitialized resource in Linux kernel - CVE-2026-98271
Published: October 7, 2026
Vulnerability identifier: #VU153753
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98271
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to stale header offsets referencing uninitialized packet-buffer data in pskb_carve_inside_header() and pskb_carve_inside_nonlinear() when removing initial packet bytes and reallocating the skb head. A local user can trigger RDS-over-TCP packet processing that leaves these stale offsets to cause a denial of service.
The observed kernel BUG occurs when drop_monitor processes packet buffers freed with SKB_DROP_REASON_QUEUE_PURGE during RDS incoming-message cleanup.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98271
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1