Not yet scoredPublished Oct 18, 2026

CVE-2026-98582nfc: st21nfca: validate received frame size

Updated under an hour ago (Oct 27, 2026, 7:40 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: nfc: st21nfca: validate received frame size st21nfca_hci_i2c_repack() trims a received frame at its EOF marker before removing byte stuffing. It then assumes the truncated frame contains the LLC header and two CRC bytes, and it unconditionally reads the byte after an escape marker. A malformed frame can place EOF immediately after the start marker or can end its data portion with an escape marker. The former leaves too few bytes for check_crc(), while the latter makes the unstuffing loop read past the current skb length. Require the minimum framing bytes both before and after unstuffing. Use separate input and output cursors while removing byte stuffing, and reject an escape marker without its encoded byte. This keeps malformed frames within the received frame boundary before CRC processing.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 18, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 3096e25a3e40b73afd59e46f3bf8d84f919992a1 before 8934d2889ae16a7c77520e002398d0689c1ecea5; from 3096e25a3e40b73afd59e46f3bf8d84f919992a1 before d0596ee6c4b928a5c288790522a7495ee867da72; from 3096e25a3e40b73afd59e46f3bf8d84f919992a1 before f526c218a149a30f110ce434ff17e033042404b8; from 3096e25a3e40b73afd59e46f3bf8d84f919992a1 before d4008c3499dba7829bfe002edd99a8bff8ae3a7c; 3096e25a3e40b73afd59e46f3bf8d84f919992a1 builds before 91be5161f37b0a2795ad6806d69be5fa74522e5c; from 3096e25a3e40b73afd59e46f3bf8d84f919992a1 before 57919d0662d8856211b794140172e51ca389f23d; 3096e25a3e40b73afd59e46f3bf8d84f919992a1 builds before 7b996cc06dda54c02a5aa607bda01109f0ac51e6; from 3096e25a3e40b73afd59e46f3bf8d84f919992a1 before a653c01ce447f10c36b901646888c0330363af4f	CNA record

References

References

https://git.kernel.org/stable/c/8934d2889ae16a7c77520e002398d0689c1ecea5
https://git.kernel.org/stable/c/d0596ee6c4b928a5c288790522a7495ee867da72
https://git.kernel.org/stable/c/f526c218a149a30f110ce434ff17e033042404b8
https://git.kernel.org/stable/c/d4008c3499dba7829bfe002edd99a8bff8ae3a7c
https://git.kernel.org/stable/c/91be5161f37b0a2795ad6806d69be5fa74522e5c
https://git.kernel.org/stable/c/57919d0662d8856211b794140172e51ca389f23d
https://git.kernel.org/stable/c/7b996cc06dda54c02a5aa607bda01109f0ac51e6
https://git.kernel.org/stable/c/a653c01ce447f10c36b901646888c0330363af4f

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.