PT-2026-27704 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-04-20 · CVE-2026-23339

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The nci transceive() function in the Linux kernel does not free memory allocated to skb (socket buffer) in certain error scenarios, specifically when encountering -EPROTO, -EINVAL, or -EBUSY errors. This can lead to memory leaks. The issue is related to clearing NCI DATA EXCHANGE and was observed during the nci/nci dev selftest in NIPA, detected by kmemleak. The function nci transceive() takes ownership of the skb passed by the caller, but fails to release it under these error conditions.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-23339

ECHO-196B-CA17-BE07

Affected Products

Linux Kernel

References · 24

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23339.json · Exploit
• https://git.kernel.org/stable/c/3245801d44a44c090acefe19a12d22d12cac45c5 · Patch
• https://ubuntu.com/security/CVE-2026-23339 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-23339 · Vendor Advisory
• https://git.kernel.org/stable/c/54f7f0eaafa56b5994cdb5c7967946922c2e1d22 · Patch
• https://osv.dev/vulnerability/CVE-2026-23339 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23339 · Vendor Advisory
• https://git.kernel.org/stable/c/9d448bbab724b94d6c561e1f314656f5b88a7cb3 · Patch
• https://git.kernel.org/stable/c/b367cb44d919f35b07cd56feffa15e68cd9f53f9 · Patch
• https://git.kernel.org/stable/c/dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23339 · Security Note
• https://git.kernel.org/stable/c/7bd4b0c4779f978a6528c9b7937d2ca18e936e2c · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23339 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23339 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23339 · Vendor Advisory