Improper control of a resource through its lifetime in Linux kernel - CVE-2026-97964
Published: September 28, 2026
Vulnerability identifier: #VU152503
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97964
CWE-ID: CWE-664
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to modify data visible to an AF_PACKET socket.
The vulnerability exists due to failure to ensure a writable skb header in ppp_sync_txmunge() when bridging a received PPP frame to a synchronous tty channel. A remote attacker can send a PPPoE frame that is bridged to a synchronous tty channel to modify data visible to an AF_PACKET socket.
Exploitation requires the frame buffer to be shared with a clone queued to an AF_PACKET socket.
Affected software
Linux kernel
How to mitigate CVE-2026-97964
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3