CVE-2026-89851
Published Sep 16, 2026
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.
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References
Other 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
Frequently Asked Questions
What is CVE-2026-89851? +
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.
How do I check if I'm vulnerable to CVE-2026-89851? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.