CVE-2026-31629General(linux / linux_kernel)

LOWCVSS 8.8 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch linux linux_kernel systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: add missing return after LLCP_CLOSED checks In nfc_llcp_recv_hdlc() and nfc_llcp_recv_disc(), when the socket state is LLCP_CLOSED, the code correctly calls release_sock() and nfc_llcp_sock_put() but fails to return. Execution falls through to the remainder of the function, which calls release_sock() and nfc_llcp_sock_put() again. This results in a double release_sock() and a refcount underflow via double nfc_llcp_sock_put(), leading to a use-after-free. Add the missing return statements after the LLCP_CLOSED branches in both functions to prevent the fall-through.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-667

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Affected systems

Vendors
Products
linux_kernel

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-04-24: 2Patch / Workaround · 2026-04-24: 1Technical Details · 2026-04-24: 104-24
Signal classification2 categories
General
150.0%
Patch
150.0%
Referenced assets2 URLs
Full discourse2 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-31629 Missing Return Statement Causing Use-After-Free in Linux Kernel NFC LLCP https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-31629

    Post summary

    The text provides a basic announcement of CVE-2026-31629, naming it as a use‑after‑free flaw in the Linux Kernel NFC LLCP, but lacks any additional details regarding PoC, exploitation, or mitigation.

    0000046
    4.0K followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-31629 In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: add missing return after LLCP_CLOSED checks In nfc_llcp_recv_hdlc() and nfc_llcp_recv… https://www.cve.org/CVERecord?id=CVE-2026-31629

    Post summary

    The text announces that CVE‑2026‑31629 has been fixed in the Linux kernel; no PoC, exploit, or active exploitation details are provided.

    0000083
    57.2K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---

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