Linux Kernel up to 7.2.4 qla2xxx qla2x00_dfs_fce_write null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.2.4 and classified as problematic. Affected is the function qla2x00_dfs_fce_write of the component qla2xxx. Such manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2026-89851. The attack must be carried out locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 7.2.4. Affected by this issue is the function qla2x00_dfs_fce_write of the component qla2xxx. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-89851 since 09/11/2026. The exploitation is known to be easy. The attack needs to be approached locally. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc1 eliminates this vulnerability. Applying the patch b0c08c08a08b6cca0e7e192bcbe0514e41fcc55f/9932cbd0b49d0a5ab8378d32650ffb51604ffa35/f5e245164d187d1ee227140c8b2e83b67f59c1fd/5762d992dddaf301e7fb78f797de407116847121/eff41f50461c238bd2c5cd20672a5b53e68d493a/7203d4aed8f444e7376c2dee8d93577b37cf9989/aac0d3cb9199121d2ce5906e06f94b793fac1052/b7368687e3d11f51392d3c4774ec0263d5fbf31f is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc1
Patch: b0c08c08a08b6cca0e7e192bcbe0514e41fcc55f/9932cbd0b49d0a5ab8378d32650ffb51604ffa35/f5e245164d187d1ee227140c8b2e83b67f59c1fd/5762d992dddaf301e7fb78f797de407116847121/eff41f50461c238bd2c5cd20672a5b53e68d493a/7203d4aed8f444e7376c2dee8d93577b37cf9989/aac0d3cb9199121d2ce5906e06f94b793fac1052/b7368687e3d11f51392d3c4774ec0263d5fbf31f

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89851 (🔒)
GCVE (CVE): GCVE-0-2026-89851
GCVE (VulDB): GCVE-100-405668

Entryinfo

Created: 09/16/2026 13:29
Changes: 09/16/2026 13:29 (59)
Complete: 🔍
Cache ID: 216::103

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