Answer in brief
CVE-2026-23339 records a Unknown severity vulnerability in nfc: nci: free skb on nci_transceive early error paths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <b367cb44d919f35b07cd56feffa15e68cd9f53f9 || >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <6d898f943766440cf766d30364e715111c3563b5 || >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <33f6b8a96dda045789796c3bcb451c74ac158039 || >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89 || >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <3245801d44a44c090acefe19a12d22d12cac45c5 || >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <9d448bbab724b94d6c561e1f314656f5b88a7cb3 || >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <54f7f0eaafa56b5994cdb5c7967946922c2e1d22 || >=6a2968aaf50c7a22fced77a5e24aa636281efca8 <7bd4b0c4779f978a6528c9b7937d2ca18e936e2c | b367cb44d919f35b07cd56feffa15e68cd9f53f9, 6d898f943766440cf766d30364e715111c3563b5, 33f6b8a96dda045789796c3bcb451c74ac158039, dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89, 3245801d44a44c090acefe19a12d22d12cac45c5, 9d448bbab724b94d6c561e1f314656f5b88a7cb3, 54f7f0eaafa56b5994cdb5c7967946922c2e1d22, 7bd4b0c4779f978a6528c9b7937d2ca18e936e2c |
| Linux/Linuxgeneric | 3.2 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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
Quoted source text, attributed separately from HOL analysis.