CVE-2026-31660: Linux kernel · nfc: pn533: allocate rx skb before consuming bytes
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 12 Nov 2026, 03:18 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 24 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
AI-suggested
A fix has been implemented in the Linux kernel to allocate the receive buffer before consuming bytes, preventing the NULL pointer dereference. Users should apply the official Linux kernel update that includes this fix. Since this is a kernel vulnerability, upgrading to a fixed kernel version is the recommended mitigation.
Description
A vulnerability in the Linux kernel's NFC driver for the PN533 chip involves improper handling of receive buffers. The issue occurs because the driver may consume bytes into a receive buffer before allocating a new buffer, leading to a NULL pointer dereference if buffer allocation fails. This flaw has been fixed by changing the allocation timing to occur before consuming bytes.
References
- git.kernel.org/stable/c/2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb (opens in a new tab)
- git.kernel.org/stable/c/8b71299d587d9e4c830c18afb884c80ddb30ad28 (opens in a new tab)
- git.kernel.org/stable/c/16649adc2e19509104245ea1f349b629d858f11f (opens in a new tab)
- git.kernel.org/stable/c/07cb6c72e66ba548679f22ac29ad588da8999279 (opens in a new tab)
- git.kernel.org/stable/c/a9495069b43b8634c1ae0042e888766c34f66637 (opens in a new tab)
- git.kernel.org/stable/c/21ae2cda66a55c759607bbf1d23cbaa42019d2de (opens in a new tab)
- git.kernel.org/stable/c/7e37da42eda45d7859d9273fc7e225d8df458038 (opens in a new tab)
- git.kernel.org/stable/c/c71ba669b570c7b3f86ec875be222ea11dacb352 (opens in a new tab)