🛡️ CVE-2026-23339 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

nfc: nci: free skb on nci_transceive early error paths

In the Linux kernel, the following vulnerability has been resolved:

nfc: nci: free skb on nci_transceive early error paths

nci_transceive() takes ownership of the skb passed by the caller,

but the -EPROTO, -EINVAL, and -EBUSY error paths return without

freeing it.

Due to issues clearing NCI_DATA_EXCHANGE fixed by subsequent changes

the nci/nci_dev selftest hits the error path occasionally in NIPA,

and kmemleak detects leaks:

unreferenced object 0xff11000015ce6a40 (size 640):

comm "nci_dev", pid 3954, jiffies 4295441246

hex dump (first 32 bytes):

6b 6b 6b 6b 00 a4 00 0c 02 e1 03 6b 6b 6b 6b 6b kkkk.......kkkkk

6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk

backtrace (crc 7c40cc2a):

kmem_cache_alloc_node_noprof+0x492/0x630

__alloc_skb+0x11e/0x5f0

alloc_skb_with_frags+0xc6/0x8f0

sock_alloc_send_pskb+0x326/0x3f0

nfc_alloc_send_skb+0x94/0x1d0

rawsock_sendmsg+0x162/0x4c0

do_syscall_64+0x117/0xfc0

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2026-23339 is recorded against 2 packages.

  • kernel (from 6.19.0 up to 6.19.7)
  • linux-kernel

Timeline and source

Published on 25 March 2026 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2026-23339 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-03-25
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 6.19.0 6.19.7
linux-kernel — —

References

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