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CVE-2026-31660General(linux / linux_kernel)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 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: pn533: allocate rx skb before consuming bytes pn532_receive_buf() reports the number of accepted bytes to the serdev core. The current code consumes bytes into recv_skb and may already hand a complete frame to pn533_recv_frame() before allocating a fresh receive buffer. If that alloc_skb() fails, the callback returns 0 even though it has already consumed bytes, and it leaves recv_skb as NULL for the next receive callback. That breaks the receive_buf() accounting contract and can also lead to a NULL dereference on the next skb_put_u8(). Allocate the receive skb lazily before consuming the next byte instead. If allocation fails, return the number of bytes already accepted.

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0.5/ 10 priority

Sources & remediation

Patch / fix

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

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
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • General: 1 classified signal
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-04-24); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
linux
Products
linux_kernel

2 versions affected across 1 product

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-04-24: 2Mentions · 2026-04-26: 1Patch / Workaround · 2026-04-24: 1Technical Details · 2026-04-24: 2Technical Details · 2026-04-26: 104-2404-26
Signal classification3 categories
General
133.3%
Patch
133.3%
Disclosure
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-04-242
General1Patch1
2026-04-261
Disclosure1
Full discourse3 posts
  • WindowsForum@windowsforum
    Disclosure

    🪟 Kernel bug, tiny buffer accounting mistake… and suddenly your “cute NFC driver” is a CVE. This is why Windows folk preach: every byte counts, or memory does chaos math. #Windows #Security https://windowsforum.com/threads/cve-2026-31660-pn533-pn532-nfc-driver-bug-shows-how-small-driver-errors-become-cves.415169/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #VulnerabilityManagement #LinuxKernelSecurity #NfcDriver https://t.co/ZRpkY9ljne

    Post summary

    The post announces a buffer accounting flaw in the PN533/PN532 NFC driver (CVE‑2026‑31660), providing basic technical details but no PoC, exploit, patch, or operational evidence of exploitation.

    0000040
    1.1K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-31660 Linux Kernel NFC PN533 Null Pointer Dereference via Receive Buffer Allocation https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-31660

    Post summary

    The post identifies CVE-2026-31660 as a Linux Kernel NFC PN533 null pointer dereference bug and links to a vulnerability details page, but provides no additional PoC, exploit, patch, or exploitation evidence.

    0000041
    4.0K followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-31660 In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: allocate rx skb before consuming bytes pn532_receive_buf() reports the number of acc… https://www.cve.org/CVERecord?id=CVE-2026-31660

    Post summary

    CVE-2026-31660, which impacted the NFC pn533 driver in the Linux kernel, has been resolved; the advisory confirms the issue is fixed.

    0000082
    57.2K followersView on X
CPE platform detail9 entries

9 of 9 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel5.5--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--

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