Linux Kernel up to 6.12.111/6.18.52/7.2.6 qla2xxx __qla2x00_alloc_iocbs improper synchronization

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.111/6.18.52/7.2.6. It has been rated as very critical. This affects the function __qla2x00_alloc_iocbs of the component qla2xxx. This manipulation causes improper synchronization. The identification of this vulnerability is CVE-2026-98386. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.111/6.18.52/7.2.6. It has been declared as very critical. Affected by this vulnerability is the function __qla2x00_alloc_iocbs of the component qla2xxx. The manipulation with an unknown input leads to a improper synchronization vulnerability. The CWE definition for the vulnerability is CWE-662. The product utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot For QLAFX00 the request ring is ioremapped device I/O memory (ha->iobase + req_que_off), not DMA-coherent RAM, which is why the rest of the FX00 path accesses it through memcpy_toio() and the wrt_reg_* helpers. __qla2x00_alloc_iocbs() however zeroed the producer slot with a plain memset(). On architectures such as ARM64 a regular memset() may emit unaligned or block-zeroing instructions (e.g. DC ZVA) that are invalid on Device memory, leading to a synchronous external abort. Use memset_io() to clear the slot for QLAFX00, matching the I/O accessors used elsewhere on this ring. Other adapters keep the plain memset() on their DMA-coherent rings. The zero-fill is retained for FX00 because its IOCB builders (e.g. qlafx00_fxdisc_iocb()) copy only part of the entry and rely on the unused tail being pre-zeroed.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-98386 since 09/25/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/14/2026).

Upgrading to version 6.12.112, 6.18.53, 7.2.7 or 7.3-rc1 eliminates this vulnerability. Applying the patch 53eb96c244d150dfb8cc4b5b0492ab53755f3701/6ee6dfd922fafd508f6bde16de30dd2db796b7a7/e41d28d9a242c4005b7d01a7ee7769405a6a2c2e/626e44f3d8a924a97a3848a9fd45833947e081e9 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
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: Improper synchronization
CWE: CWE-662
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 6.12.112/6.18.53/7.2.7/7.3-rc1
Patch: 53eb96c244d150dfb8cc4b5b0492ab53755f3701/6ee6dfd922fafd508f6bde16de30dd2db796b7a7/e41d28d9a242c4005b7d01a7ee7769405a6a2c2e/626e44f3d8a924a97a3848a9fd45833947e081e9

Timelineinfo

09/25/2026 CVE reserved
10/14/2026 +19 days Advisory disclosed
10/14/2026 +0 days VulDB entry created
10/14/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98386 (🔒)
GCVE (CVE): GCVE-0-2026-98386
GCVE (VulDB): GCVE-100-419839

Entryinfo

Created: 10/14/2026 15:51
Changes: 10/14/2026 15:51 (59)
Complete: 🔍
Cache ID: 216::103

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