CVE-2026-23339 PUBLISHED

nfc: nci: free skb on nci_transceive early error paths

Assigner: Linux
Reserved: 13.01.2026 Published: 25.03.2026 Updated: 25.03.2026

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

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 6a2968aaf50c7a22fced77a5e24aa636281efca8 to 33f6b8a96dda045789796c3bcb451c74ac158039 (excl.)
  • affected from 6a2968aaf50c7a22fced77a5e24aa636281efca8 to dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89 (excl.)
  • affected from 6a2968aaf50c7a22fced77a5e24aa636281efca8 to 3245801d44a44c090acefe19a12d22d12cac45c5 (excl.)
  • affected from 6a2968aaf50c7a22fced77a5e24aa636281efca8 to 9d448bbab724b94d6c561e1f314656f5b88a7cb3 (excl.)
  • affected from 6a2968aaf50c7a22fced77a5e24aa636281efca8 to 54f7f0eaafa56b5994cdb5c7967946922c2e1d22 (excl.)
  • affected from 6a2968aaf50c7a22fced77a5e24aa636281efca8 to 7bd4b0c4779f978a6528c9b7937d2ca18e936e2c (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 3.2 is affected
  • unaffected from 0 to 3.2 (excl.)
  • unaffected from 6.1.167 to 6.1.* (incl.)
  • unaffected from 6.6.130 to 6.6.* (incl.)
  • unaffected from 6.12.77 to 6.12.* (incl.)
  • unaffected from 6.18.17 to 6.18.* (incl.)
  • unaffected from 6.19.7 to 6.19.* (incl.)
  • unaffected from 7.0-rc3 to * (incl.)

References