Medium 5.5Published Mar 25, 2026

CVE-2026-23339nfc: nci: free skb on nci_transceive early error paths

Updated under an hour ago (Oct 26, 2026, 9:30 PM ET)

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Exploited in the last 30 days

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

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before b367cb44d919f35b07cd56feffa15e68cd9f53f9; from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before 6d898f943766440cf766d30364e715111c3563b5; from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before 33f6b8a96dda045789796c3bcb451c74ac158039; from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89; from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before 3245801d44a44c090acefe19a12d22d12cac45c5; from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before 9d448bbab724b94d6c561e1f314656f5b88a7cb3; from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before 54f7f0eaafa56b5994cdb5c7967946922c2e1d22; from 6a2968aaf50c7a22fced77a5e24aa636281efca8 before 7bd4b0c4779f978a6528c9b7937d2ca18e936e2c	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.2.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 3.2; and 7 more ranges	NVD

References

References

https://git.kernel.org/stable/c/b367cb44d919f35b07cd56feffa15e68cd9f53f9	patch
https://git.kernel.org/stable/c/6d898f943766440cf766d30364e715111c3563b5	patch
https://git.kernel.org/stable/c/33f6b8a96dda045789796c3bcb451c74ac158039	patch
https://git.kernel.org/stable/c/dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89	patch
https://git.kernel.org/stable/c/3245801d44a44c090acefe19a12d22d12cac45c5	patch
https://git.kernel.org/stable/c/9d448bbab724b94d6c561e1f314656f5b88a7cb3	patch
https://git.kernel.org/stable/c/54f7f0eaafa56b5994cdb5c7967946922c2e1d22	patch
https://git.kernel.org/stable/c/7bd4b0c4779f978a6528c9b7937d2ca18e936e2c	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.