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CVE-2026-89851: scsi: qla2xxx: Fix FCE trace enable parsing in debugfs

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix FCE trace enable parsing in debugfs qla2x00_dfs_fce_write() called kstrtoul() with a NULL result pointer, so a successful parse would dereference NULL and oops. Worse, the int return value (0 on success, negative errno on failure) was assigned to the unsigned long enable flag, inverting the intended logic: a valid number was treated as "disable" while a parse failure enabled FCE. Parse the value into enable and propagate parse errors to userspace.

Affected products

• Linux kernel: from 5.10.235 before 5.10.270; from 5.15.179 before 5.15.221; from 6.1.129 before 6.1.188; from 6.6.78 before 6.6.157; from 6.12.14 before 6.12.110; from 6.13.3 before 6.14 — fixed in 5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.14, 6.6.157

How to fix

Upgrade to a fixed version: Linux kernel 5.10.270, 5.15.221, 6.1.188, 6.12.110. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/5762d992dddaf301e7fb78f797de407116847121
• https://git.kernel.org/stable/c/7203d4aed8f444e7376c2dee8d93577b37cf9989
• https://git.kernel.org/stable/c/9932cbd0b49d0a5ab8378d32650ffb51604ffa35
• https://git.kernel.org/stable/c/aac0d3cb9199121d2ce5906e06f94b793fac1052
• https://git.kernel.org/stable/c/b0c08c08a08b6cca0e7e192bcbe0514e41fcc55f
• https://git.kernel.org/stable/c/b7368687e3d11f51392d3c4774ec0263d5fbf31f
• https://git.kernel.org/stable/c/eff41f50461c238bd2c5cd20672a5b53e68d493a
• https://git.kernel.org/stable/c/f5e245164d187d1ee227140c8b2e83b67f59c1fd

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