CVE-2026-31622

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31622
In the Linux kernel, the following vulnerability has been resolved: NFC: digital: Bounds check NFC-A cascade depth in SDD response handler The NFC-A anti-collision cascade in digital_in_recv_sdd_res() appends 3 or 4 bytes to target->nfcid1 on each round, but the number of cascade rounds is controlled entirely by the peer device. The peer sets the cascade tag in the SDD_RES (deciding 3 vs 4 bytes) and the cascade-incomplete bit in the SEL_RES (deciding whether another round follows). ISO 14443-3 limits NFC-A to three cascade levels and target->nfcid1 is sized accordingly (NFC_NFCID1_MAXSIZE = 10), but nothing in the driver actually enforces this. This means a malicious peer can keep the cascade running, writing past the heap-allocated nfc_target with each round. Fix this by rejecting the response when the accumulated UID would exceed the buffer. Commit e329e71013c9 ("NFC: nci: Bounds check struct nfc_target arrays") fixed similar missing checks against the same field on the NCI path.

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1bec5698b55aa2be5c3b983dba657c01d0fd3dbc Patch
https://git.kernel.org/stable/c/2819f34e08bdffb6f06a51c67948ec5737fb166a Patch
https://git.kernel.org/stable/c/46ce8be2ced389bccd84bcc04a12cf2f4d0c22d1 Patch
https://git.kernel.org/stable/c/5a59bf70c38ee1eb4be03bab830bbc3a6f0bd1f1 Patch
https://git.kernel.org/stable/c/8d9d9bf3565271ca7ab9c716a94e87296177e7ba Patch
https://git.kernel.org/stable/c/cc024a3de265ef6c58957f4990eccb9f806208cb Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

28 Apr 2026, 14:14

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/1bec5698b55aa2be5c3b983dba657c01d0fd3dbc - () https://git.kernel.org/stable/c/1bec5698b55aa2be5c3b983dba657c01d0fd3dbc - Patch
References () https://git.kernel.org/stable/c/2819f34e08bdffb6f06a51c67948ec5737fb166a - () https://git.kernel.org/stable/c/2819f34e08bdffb6f06a51c67948ec5737fb166a - Patch
References () https://git.kernel.org/stable/c/46ce8be2ced389bccd84bcc04a12cf2f4d0c22d1 - () https://git.kernel.org/stable/c/46ce8be2ced389bccd84bcc04a12cf2f4d0c22d1 - Patch
References () https://git.kernel.org/stable/c/5a59bf70c38ee1eb4be03bab830bbc3a6f0bd1f1 - () https://git.kernel.org/stable/c/5a59bf70c38ee1eb4be03bab830bbc3a6f0bd1f1 - Patch
References () https://git.kernel.org/stable/c/8d9d9bf3565271ca7ab9c716a94e87296177e7ba - () https://git.kernel.org/stable/c/8d9d9bf3565271ca7ab9c716a94e87296177e7ba - Patch
References () https://git.kernel.org/stable/c/cc024a3de265ef6c58957f4990eccb9f806208cb - () https://git.kernel.org/stable/c/cc024a3de265ef6c58957f4990eccb9f806208cb - Patch
CWE CWE-120
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

27 Apr 2026, 15:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 8.8

27 Apr 2026, 14:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/2819f34e08bdffb6f06a51c67948ec5737fb166a -

27 Apr 2026, 12:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/46ce8be2ced389bccd84bcc04a12cf2f4d0c22d1 -

24 Apr 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-24 15:16

Updated : 2026-04-28 14:14

NVD link : CVE-2026-31622

Mitre link : CVE-2026-31622

CVE.ORG link : CVE-2026-31622

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')