CVE-2026-98579 nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure
A memory leak in the Linux kernel NFC LLCP module allows local attackers to cause denial of service by triggering error paths in SDREQ processing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98579?
CVE-2026-98579 is a memory corruption vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure
nfc_genl_llc_sdreq() builds a list of TLV nodes while walking nested netlink attrs, but 3 error paths (nested-attr parse failure, TLV alloc ENOMEM, nfc_llcp_send_snl_sdreq() failure) all skip freeing what was already queued.
Route them through a new free_list label, mirroring the SDRES path in the same file which already does this. Harmless on the success path too -- send_snl_sdreq() drains the list as it moves nodes, so it's already empty by the time free_list runs.
Which versions are affected by CVE-2026-98579?
How do I fix CVE-2026-98579?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-98579 being exploited?
There is no known exploitation of CVE-2026-98579 in the wild and no public exploit code.
Sources
Also known as AZL-109281, BELL-CVE-2026-98579, DEBIAN-CVE-2026-98579, GHSA-g53r-f4w7-7x66, UBUNTU-CVE-2026-98579.