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EPSS 0.4%top 72%

In the Linux kernel, the following vulnerability has been resolved: nfc: hci: fix out-of-bounds read in HCP header parsing Both… (CVE-2026-63915)

0
Medium
Published: 07/20/2026 (07/20/2026, 00:00:00 UTC)
Source: GCVE Database
Product: linux

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: hci: fix out-of-bounds read in HCP header parsing Both nfc_hci_recv_from_llc() and nci_hci_data_received_cb() read packet->header from skb->data at function entry without first checking that the buffer holds at least one byte. A malicious NFC peer can send a 0-byte HCP frame that passes through the SHDLC layer and reaches these functions, causing an out-of-bounds heap read of packet->header. The same 0-byte frame, if queued as a non-final fragment, also causes the reassembly loop to underflow msg_len to UINT_MAX, triggering skb_over_panic() when the reassembled skb is written. Fix this by adding a pskb_may_pull() check at the entry of each function before packet->header is first accessed. The existing pskb_may_pull() checks before the reassembled hcp_skb is cast to struct hcp_packet remain in place to guard the 2-byte HCP message header.

CVSS v3.1

Score 8.8high

Attack Vector
Adjacent Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

Affected versions
<7.0.0-28.28~24.04.1<7.0.0-1016.16~24.04.1<7.0.0-28.28.1~24.04.3<7.0.0-28.28<7.0.0-1009.9

Technical Details

Gcve Source
db.gcve.eu
Osv Id
GHSA-jmh7-f679-ghx4
Osv Schema Version
1.4.0
Aliases
["CVE-2026-63915"]
Ecosystems
[]
Database Specific Severity
null
Cvss Version
3.1

Threat ID: 6a5d27ab2a4a8d598912f5b5

Added to database: 07/19/2026, 19:38:19 UTC

Last enriched: 07/19/2026, 20:09:05 UTC

Last updated: 08/31/2026, 10:52:10 UTC

Views: 57

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