CVE-2025-38399: scsi: target: Fix NULL pointer dereference in core_scsi3_decode_spec_i_port()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-25 · updated 2026-10-15
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: target: Fix NULL pointer dereference in core_scsi3_decode_spec_i_port() The function core_scsi3_decode_spec_i_port(), in its error code path, unconditionally calls core_scsi3_lunacl_undepend_item() passing the dest_se_deve pointer, which may be NULL. This can lead to a NULL pointer dereference if dest_se_deve remains unset. SPC-3 PR SPEC_I_PT: Unable to locate dest_tpg Unable to handle kernel paging request at virtual address dfff800000000012 Call trace: core_scsi3_lunacl_undepend_item+0x2c/0xf0 [target_core_mod] (P) core_scsi3_decode_spec_i_port+0x120c/0x1c30 [target_core_mod] core_scsi3_emulate_pro_register+0x6b8/0xcd8 [target_core_mod] target_scsi3_emulate_pr_out+0x56c/0x840 [target_core_mod] Fix this by adding a NULL check before calling core_scsi3_lunacl_undepend_item()

Affected products

Debian Linux: 11.0
Linux kernel: from 5.9 before 5.10.240; from 5.11 before 5.15.187; from 5.16 before 6.1.144; from 6.2 before 6.6.97; from 6.7 before 6.12.37; from 6.13 before 6.15.6 — fixed in 5.10.240, 5.15.187, 6.1.144, 6.12.37, 6.15.6, 6.6.97

How to fix

Upgrade to a fixed version: Linux kernel 5.10.240, 5.15.187, 6.1.144, 6.12.37. Check the vendor advisory for mitigations.

References

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