Linux Kernel up to 7.2.4 qla2xxx qla2x00_error_entry req_q_map null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00-

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.2.4. It has been declared as critical. Affected by this issue is the function qla2x00_error_entry of the component qla2xxx. Executing a manipulation of the argument req_q_map can lead to null pointer dereference. This vulnerability is registered as CVE-2026-89845. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 7.2.4 and classified as critical. This vulnerability affects the function qla2x00_error_entry of the component qla2xxx. The manipulation of the argument req_q_map with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry() qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL check and again when assigning it to req. The map slot is cleared by qla25xx_free_req_que() (ha->req_q_map[que_id] = NULL under mq_lock) during queue teardown, while the response-queue interrupt that drives qla2x00_error_entry() is still registered (the IRQ is released later in qla25xx_free_rsp_que()). If the slot is set to NULL between the two reads, req becomes NULL and is dereferenced. Read the slot once into req and NULL-check the local before use. mq_lock is a mutex and cannot be taken from interrupt context, so the single read plus local check is the appropriate fix for the reported NULL dereference.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-89845 since 09/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/16/2026).

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 c845f2597787ef70159a32566669e308b2807a56/fe04b31e386aee4cc3a18f07462af146037dc389/1b995cf4157465357d66ba096e7cdaafab9972e7/d79376fbd2a076de82c1cd8aa0b600b300c75a44/1c90b74e484ba48f31944fe04963d99e01ac3767/5dd9bec8004ba93cee8b689bf54ce294f59e5e3c/35124cfa9898b2088ee72859e573e0876aff66fc/deb8abde83a799d2501f3977f6d6051000253f5e 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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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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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: No
Local: No
Remote: Yes

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: c845f2597787ef70159a32566669e308b2807a56/fe04b31e386aee4cc3a18f07462af146037dc389/1b995cf4157465357d66ba096e7cdaafab9972e7/d79376fbd2a076de82c1cd8aa0b600b300c75a44/1c90b74e484ba48f31944fe04963d99e01ac3767/5dd9bec8004ba93cee8b689bf54ce294f59e5e3c/35124cfa9898b2088ee72859e573e0876aff66fc/deb8abde83a799d2501f3977f6d6051000253f5e

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-2026-89845 (🔒)
GCVE (CVE): GCVE-0-2026-89845
GCVE (VulDB): GCVE-100-405670

Entryinfo

Created: 09/16/2026 13:30
Changes: 09/16/2026 13:30 (60)
Complete: 🔍
Cache ID: 216::103

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