{"cve":"CVE-2026-63915","nvd":{"published":"2026-07-19T16:17:09.517","modified":"2026-10-30T17:44:59.950","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: hci: fix out-of-bounds read in HCP header parsing\n\nBoth nfc_hci_recv_from_llc() and nci_hci_data_received_cb() read\npacket->header from skb->data at function entry without first checking\nthat the buffer holds at least one byte. A malicious NFC peer can send\na 0-byte HCP frame that passes through the SHDLC layer and reaches\nthese functions, causing an out-of-bounds heap read of packet->header.\nThe same 0-byte frame, if queued as a non-final fragment, also causes\nthe reassembly loop to underflow msg_len to UINT_MAX, triggering\nskb_over_panic() when the reassembled skb is written.\n\nFix this by adding a pskb_may_pull() check at the entry of each\nfunction before packet->header is first accessed. The existing\npskb_may_pull() checks before the reassembled hcp_skb is cast to\nstruct hcp_packet remain in place to guard the 2-byte HCP message\nheader.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-125"],"references":["https://git.kernel.org/stable/c/1905f5ec3641b2b234bb63549c8ca11ab85466eb","https://git.kernel.org/stable/c/22d41b176b9989efd21c3b2d3abf6728f05b9d9a","https://git.kernel.org/stable/c/37382293f174b82a0616c8295e32b1fc8e13d1ed","https://git.kernel.org/stable/c/83b1362edc9d6ae376c6f36da116e2c70f2e70a6","https://git.kernel.org/stable/c/b99366d74b535d0cadb1ef73e04639415d9ff3b7"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T18:01:49.511007073+00:00"},"epss":{"cve":"CVE-2026-63915","score":0.00354,"percentile":0.2914,"date":"2026-10-30"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}