Linux Kernel LLCP nfc_genl_llc_sdreq memory leak

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel. Impacted is the function nfc_genl_llc_sdreq of the component LLCP. Executing a manipulation can lead to memory leak. This vulnerability is handled as CVE-2026-98579. It is possible to launch the attack on the local host. There is not any exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel (version unknown) and classified as critical. This vulnerability affects the function nfc_genl_llc_sdreq of the component LLCP. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure nfc_genl_llc_sdreq() builds a list of TLV nodes while walking nested netlink attrs, but 3 error paths (nested-attr parse failure, TLV alloc ENOMEM, nfc_llcp_send_snl_sdreq() failure) all skip freeing what was already queued. Route them through a new free_list label, mirroring the SDRES path in the same file which already does this. Harmless on the success path too -- send_snl_sdreq() drains the list as it moves nodes, so it's already empty by the time free_list runs.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-98579 since 09/25/2026. The exploitation appears to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

Applying the patch 5b1eca82085134bd92cd3810b0ef003c91e3f668/d3f60a7fc291d08cd9192a3b4cd5d3a223fa7d02/755bfc409748d8f3df64eb0eb26926270de3dd77/e43ec0191c1630f41e7043ac729ea6f1b8044a7f/08d2c069239ab425fdd333784a6a3b3e034e4aa0/cbde7f5d326172d6dbb55cca0df42fa7e1ed8115/0b01a946b0f234f5badd25968610b585a4895f08/66f4300206b82b0b143ef0d9be90cd8d29f23a47 is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

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

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Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 5b1eca82085134bd92cd3810b0ef003c91e3f668/d3f60a7fc291d08cd9192a3b4cd5d3a223fa7d02/755bfc409748d8f3df64eb0eb26926270de3dd77/e43ec0191c1630f41e7043ac729ea6f1b8044a7f/08d2c069239ab425fdd333784a6a3b3e034e4aa0/cbde7f5d326172d6dbb55cca0df42fa7e1ed8115/0b01a946b0f234f5badd25968610b585a4895f08/66f4300206b82b0b143ef0d9be90cd8d29f23a47

Timelineinfo

09/25/2026 CVE reserved
10/18/2026 +23 days Advisory disclosed
10/18/2026 +0 days VulDB entry created
10/18/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98579 (🔒)
GCVE (CVE): GCVE-0-2026-98579
GCVE (VulDB): GCVE-100-422086

Entryinfo

Created: 10/18/2026 20:15
Changes: 10/18/2026 20:15 (57)
Complete: 🔍
Cache ID: 216::103

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Discussion

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