CVE-2026-23339

nfc: nci: free skb on nci_transceive early error paths

CVE-2026-23339 is fixed in 11 products on 1 platform, first by DEBIAN-CVE-2026-23339, released March 25, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.1
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0013
2nd percentile

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

Where it's fixed

ProductFixed inFixReleased
Linux
kernel-64kb · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-azure · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-default · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-default-base · sles 15.7 6.4.0-150700.53.55.1.150700.17.33.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-docs · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-livepatch-SLE15-SP7_Update_15 · sles 15.7 1-150700.15.3.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-obs-build · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-source · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-syms · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
kernel-zfcpdump · sles 15.7 6.4.0-150700.53.55.1 SUSE-SU-2026:2238-1 Jun 30, 2026
linux · Debian 12.15 (bookworm) 6.1.170-1 DEBIAN-CVE-2026-23339 Mar 25, 2026
linux · Debian 13.5 (trixie) 6.12.85-1 DEBIAN-CVE-2026-23339 Mar 25, 2026
linux · Debian 14 6.19.8-1 DEBIAN-CVE-2026-23339 Mar 25, 2026

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