Linux Kernel up to 7.3-rc3 p54 heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.0$5k-$25k0.90-

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 7.3-rc3. Affected by this vulnerability is an unknown functionality of the component p54. Such manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2026-98187. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 7.3-rc3. Affected by this issue is an unknown functionality of the component p54. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: wifi: p54: require a full exp_if record in PDR_INTERFACE_LIST The PDR_INTERFACE_LIST loop only checks that the record start is within the entry before reading an entire struct exp_if from it. A truncated trailing record makes the if_id/variant reads cross the entry boundary into the heap beyond the EEPROM buffer (verified with a KASAN reproducer of the loop). The variant also feeds the synth front-end selection, so this is not only a leak. Advance only while a full record still fits in the entry.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-98187 since 09/25/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 10/07/2026).

Upgrading to version 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8 or 7.3-rc4 eliminates this vulnerability. Applying the patch 162dbe1c285a621eab6a9f2851086b63a0378928/70bf34b425fe549a4f6a8d50a319f8f05d1f91c9/487f966421014de41e835bbce3feb30b35f4f729/bc83c04be042f53869c315b8e1eb5f124959d1d7/d44c1badc2dcb042985f7e37f4c448c84548b81f/d2fb6b588dc5bbab4f603661e41cd60f0d931628/d82492fd0a3fb61963c236521852763238ad3898/d8efd84f49379ed28624098821f80e992657d935 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-3743). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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 5.10.271/5.15.222/6.1.189/6.6.158/6.12.112/6.18.54/7.2.8/7.3-rc4
Patch: 162dbe1c285a621eab6a9f2851086b63a0378928/70bf34b425fe549a4f6a8d50a319f8f05d1f91c9/487f966421014de41e835bbce3feb30b35f4f729/bc83c04be042f53869c315b8e1eb5f124959d1d7/d44c1badc2dcb042985f7e37f4c448c84548b81f/d2fb6b588dc5bbab4f603661e41cd60f0d931628/d82492fd0a3fb61963c236521852763238ad3898/d8efd84f49379ed28624098821f80e992657d935

Timelineinfo

09/25/2026 CVE reserved
10/06/2026 +11 days Advisory disclosed
10/06/2026 +0 days VulDB entry created
10/07/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98187 (🔒)
GCVE (CVE): GCVE-0-2026-98187
GCVE (VulDB): GCVE-100-414128
CERT Bund: WID-SEC-2026-3743 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/06/2026 13:00
Updated: 10/07/2026 02:33
Changes: 10/06/2026 13:00 (58), 10/07/2026 02:33 (7)
Complete: 🔍
Cache ID: 216::103

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