Heap-based buffer overflow in Linux kernel - CVE-2026-31622
Published: April 25, 2026
Vulnerability identifier: #VU127775
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-31622
CWE-ID: CWE-122
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in digital_in_recv_sdd_res() when processing crafted NFC-A SDD and SEL responses from a peer device. A remote attacker can send crafted responses to cause a denial of service.
The issue occurs because the peer device can control the number of NFC-A anti-collision cascade rounds and the amount of data appended to target->nfcid1 on each round.
How to mitigate CVE-2026-31622
Install security update from vendor's repository.