NULL pointer dereference in Linux kernel - CVE-2026-99152
Published: October 29, 2026
Vulnerability identifier: #VU158431
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99152
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by crashing the Linux kernel.
The vulnerability exists due to a null pointer dereference caused by insufficient task validation in libiscsi's __iscsi_complete_pdu() function when processing iSCSI management responses. A remote attacker can send an unsolicited NOP-In or a Text Response from a controlled iSCSI target with an initiator task tag identifying a never-used task slot, causing a null task connection pointer to be dereferenced and crashing the kernel.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-99152
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2