Linux Kernel up to 6.12.110/6.18.52/7.2.6/7.3-rc1 qaic resp_worker out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00+

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.12.110/6.18.52/7.2.6/7.3-rc1. The affected element is the function resp_worker of the component qaic. This manipulation causes out-of-bounds. This vulnerability is tracked as CVE-2026-98155. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.12.110/6.18.52/7.2.6/7.3-rc1. Affected by this vulnerability is the function resp_worker of the component qaic. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. 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: accel/qaic: Address potential out-of-bounds read in resp_worker() Although 'commit 2feec5ae5df7 ("accel/qaic: Handle DBC deactivation if the owner went away")' fixes the scenario it was intended for by walking the message and only decoding QAIC_TRANS_DEACTIVATE_FROM_DEV, if present, it skipped over the bounds checking code that is included in decode_message(). This could lead to issues such as reading past the slab allocation's end, infinite loops or kernel panics. For those issues to happen, a malformed wire message is needed to be sent from the device. Instead of duplicating the bounds checking code already present in decode_message(), use the function inside resp_worker().

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-98155 since 09/25/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. 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 09/25/2026).

Upgrading to version 6.12.111, 6.18.53, 7.2.7 or 7.3-rc2 eliminates this vulnerability. Applying the patch f4b64488f3deca63f7fbc7d7c3835b2e668003f9/12deeade460d47031267256ba07add51cc7eabd0/c72e81ee46bdd4c221114d6e9515e9b4647616d7/ab243f74ab4084ca5c8dec608cb5b0deb27db067 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
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: Out-of-bounds
CWE: CWE-125 / CWE-119
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 6.12.111/6.18.53/7.2.7/7.3-rc2
Patch: f4b64488f3deca63f7fbc7d7c3835b2e668003f9/12deeade460d47031267256ba07add51cc7eabd0/c72e81ee46bdd4c221114d6e9515e9b4647616d7/ab243f74ab4084ca5c8dec608cb5b0deb27db067

Timelineinfo

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

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98155 (🔒)
GCVE (CVE): GCVE-0-2026-98155
GCVE (VulDB): GCVE-100-409987

Entryinfo

Created: 09/25/2026 13:34
Changes: 09/25/2026 13:34 (59)
Complete: 🔍
Cache ID: 216::103

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