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CVE-2026-63915— nfc: hci: fix out-of-bounds read in HCP header parsing

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 3.5版本存在越界读漏洞，该漏洞源于HCP标头解析时越界读取，可能导致恶意NFC对等端发送0字节HCP帧造成堆越界读取和重组溢出。

CVSS 8.8 · High EPSS 0.35% · P28

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 8b8d2e08bf0d50193931afd27482a59376b66b2b< ed6d5d97dad0334a7f43d218753429cbe2f70a4f affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< b99366d74b535d0cadb1ef73e04639415d9ff3b7 affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 37382293f174b82a0616c8295e32b1fc8e13d1ed affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< c4cc6b3b0013acb3ed0b2b60e57dfae98647fe98 affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 1905f5ec3641b2b234bb63549c8ca11ab85466eb affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 22d41b176b9989efd21c3b2d3abf6728f05b9d9a affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 83b1362edc9d6ae376c6f36da116e2c70f2e70a6 affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< f040e590c035bfd9553fe79ee9585caf1b14d67b affected
… +10 more rows
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I. Basic Information for CVE-2026-63915

Vulnerability Information
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Vulnerability Title
nfc: hci: fix out-of-bounds read in HCP header parsing
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 3.5版本存在越界读漏洞，该漏洞源于HCP标头解析时越界读取，可能导致恶意NFC对等端发送0字节HCP帧造成堆越界读取和重组溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 8b8d2e08bf0d50193931afd27482a59376b66b2b ~ ed6d5d97dad0334a7f43d218753429cbe2f70a4f -
Linux Linux 3.5 -

II. Public POCs for CVE-2026-63915

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III. Intelligence Information for CVE-2026-63915

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Patches & Fixes for CVE-2026-63915 (8)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64046 9.8 CRITICAL net: tls: prevent chain-after-chain in plain text SG
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-53399 9.8 CRITICAL nfsd: release layout stid on setlease failure
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-63984 9.8 CRITICAL ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-63979 9.8 CRITICAL net/handshake: hand off the pinned file reference to accept_doit
CVE-2026-64125 9.8 CRITICAL net: bcmgenet: keep RBUF EEE/PM disabled
CVE-2026-64056 9.8 CRITICAL net: ethernet: cortina: Make RX SKB per-port
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-64162 9.8 CRITICAL idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()
CVE-2026-63978 9.8 CRITICAL net/handshake: Drain pending requests at net namespace exit
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-64055 9.8 CRITICAL net: ethernet: cortina: Carry over frag counter
CVE-2026-64016 9.8 CRITICAL ksmbd: fix durable reconnect error path file lifetime
CVE-2026-63886 9.8 CRITICAL scsi: target: iscsi: Validate CHAP_R length before base64 decode
CVE-2026-64113 9.8 CRITICAL ixgbevf: fix use-after-free in VEPA multicast source pruning
CVE-2026-63922 9.8 CRITICAL ipv6: exthdrs: refresh nh after handling HAO option
CVE-2026-64089 9.8 CRITICAL batman-adv: tt: fix negative last_changeset_len

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-63915

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