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

CVSS 8.8 · High EPSS 0.35% · P27

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux8b8d2e08bf0d50193931afd27482a59376b66b2b< ed6d5d97dad0334a7f43d218753429cbe2f70a4faffected
8b8d2e08bf0d50193931afd27482a59376b66b2b< b99366d74b535d0cadb1ef73e04639415d9ff3b7affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 37382293f174b82a0616c8295e32b1fc8e13d1edaffected
8b8d2e08bf0d50193931afd27482a59376b66b2b< c4cc6b3b0013acb3ed0b2b60e57dfae98647fe98affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 1905f5ec3641b2b234bb63549c8ca11ab85466ebaffected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 22d41b176b9989efd21c3b2d3abf6728f05b9d9aaffected
8b8d2e08bf0d50193931afd27482a59376b66b2b< 83b1362edc9d6ae376c6f36da116e2c70f2e70a6affected
8b8d2e08bf0d50193931afd27482a59376b66b2b< f040e590c035bfd9553fe79ee9585caf1b14d67baffected
… +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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 8b8d2e08bf0d50193931afd27482a59376b66b2b ~ ed6d5d97dad0334a7f43d218753429cbe2f70a4f -
LinuxLinux 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 · 431 CVEs total

CVE-2026-6379510.0 CRITICAL9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-639849.8 CRITICALipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
CVE-2026-640009.8 CRITICALnet: hsr: fix potential OOB access in supervision frame handling
CVE-2026-639229.8 CRITICALipv6: exthdrs: refresh nh after handling HAO option
CVE-2026-641509.8 CRITICALnetfilter: nft_inner: release local_lock before re-enabling softirqs
CVE-2026-639249.8 CRITICALipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()
CVE-2026-640469.8 CRITICALnet: tls: prevent chain-after-chain in plain text SG
CVE-2026-640479.8 CRITICALnet: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring
CVE-2026-639949.8 CRITICALtunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()
CVE-2026-639939.8 CRITICALvxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()
CVE-2026-641429.8 CRITICALksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-640559.8 CRITICALnet: ethernet: cortina: Carry over frag counter
CVE-2026-641369.8 CRITICALsmb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVE-2026-641329.8 CRITICALipv6: ioam: refresh hdr pointer before ioam6_event()
CVE-2026-533999.8 CRITICALnfsd: release layout stid on setlease failure
CVE-2026-640569.8 CRITICALnet: ethernet: cortina: Make RX SKB per-port
CVE-2026-641259.8 CRITICALnet: bcmgenet: keep RBUF EEE/PM disabled
CVE-2026-638009.8 CRITICALpNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-638579.8 CRITICALnet: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()
CVE-2026-639789.8 CRITICALnet/handshake: Drain pending requests at net namespace exit

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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