SB20261029156 - NULL pointer dereference in Linux kernel scsi driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-99152)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/11bffcd9cb346732eab2914ef44fe777a3f0b585
• https://git.kernel.org/stable/c/55a65ef61e2775aeb18fda63bd1959fa8b41f936
• https://git.kernel.org/stable/c/f721487523d45941aed4b0ac8d829b0461a7d860