{"id":"CVE-2026-63915","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-63915","generatedAt":"2026-10-28T00:28:57.900Z","title":"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…","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.","published":"2026-07-19T16:17:10.000Z","lastModified":"2026-07-27T17:44:24.000Z","status":"Awaiting Analysis","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00354,"percentile":0.28887,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/1905f5ec3641b2b234bb63549c8ca11ab85466eb","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/22d41b176b9989efd21c3b2d3abf6728f05b9d9a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/37382293f174b82a0616c8295e32b1fc8e13d1ed","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/83b1362edc9d6ae376c6f36da116e2c70f2e70a6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b99366d74b535d0cadb1ef73e04639415d9ff3b7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c4cc6b3b0013acb3ed0b2b60e57dfae98647fe98","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ed6d5d97dad0334a7f43d218753429cbe2f70a4f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f040e590c035bfd9553fe79ee9585caf1b14d67b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63915","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}