nfc: nci: free rx_data_reassembly skb on NCI device cleanup
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: nfc: nci: free rx_data_reassembly skb on NCI device cleanup rx_data_reassembly skb is stored during NCI data exchange for processing fragmented packets. It is dropped only when the last fragment is processed or when an NTF packet with NCI_OP_RF_DEACTIVATE_NTF opcode is received. However, the NCI device may be deallocated before that which leads to skb leak. As by design the rx_data_reassembly skb is bound to the NCI device and nothing prevents the device to be freed before the skb is processed in some way and cleaned, free it on the NCI device cleanup. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.2
References 8
git.kernel.org
- stable/c/7e9a8498658b398bf11b8e388005fa54e40aed81
- stable/c/71349abe3aba7fedcab5b3fcd7aa82371fb5ccbf
- stable/c/2f6d16f0520d6505241629ee2f5c131b547d5f9d
- stable/c/471c9ede8061357b43a116fa692e70d91941ac23
- stable/c/5c0c5ffaed73cbae6c317374dc32ba6cacc60895
- stable/c/16d3f507b0fa70453dc54550df093d6e9ac630c1
- stable/c/a3d90fb5c23f29ba59c04005ae76c5228cef2be9
- stable/c/bfb007aebe6bff451f7f3a4be19f4f286d0d5d9c