nfc: llcp: read llcp_sock->local under the socket lock in getsockopt (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.18 % · percentile 7 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: read llcp_sock->local under the socket lock in getsockopt nfc_llcp_getsockopt() read llcp_sock->local before lock_sock(sk) and then dereferenced the cached pointer inside the locked region. llcp_sock_bind() assigns and clears llcp_sock->local under the same socket lock, dropping the last reference on its error path. A getsockopt() racing an in-flight bind() can observe the pointer, block on lock_sock(), and then dereference a freed nfc_llcp_local once bind() has unwound. Move the llcp_sock->local read and the NULL check inside the lock_sock(sk) region so bind() cannot mutate or free the pointer between the load and the use.
References
- https://git.kernel.org/stable/c/56fd158fef20268f48db6cdfe5d722e930134eda
- https://git.kernel.org/stable/c/8ba8cec0586727cc135ca4827921fc7b52946d71
- https://git.kernel.org/stable/c/ed5240bab3468988077fe8bf29b935eaecc9ff89
- https://git.kernel.org/stable/c/fe65727a4a21b11c18eebae1338482767a897b76
- https://git.kernel.org/stable/c/2d8ac24565be85bf56580b87bf1b874d35625eb5
- https://git.kernel.org/stable/c/156e65bd29307f5053835bff60bc1ba342fa010f
- https://git.kernel.org/stable/c/d1b73962675cdc5a58e2707e25b548d8b495fde0
- https://git.kernel.org/stable/c/36812527052c5bfb1ec6c1e292d67a5bf76b750f
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-81818
- GCVE · GCVE-0-2026-90225
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 < 56fd158fef20268f48db6cdfe5d722e930134eda ; affected 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 < 8ba8cec0586727cc135ca4827921fc7b52946d71 ; affected 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 < ed5240bab3468988077fe8bf29b935eaecc9ff89 ; affected 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 < fe65727a4a21b11c18eebae1338482767a897b76 ; affected 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 < 2d8ac24565be85bf56580b87bf1b874d35625eb5 ; affected 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 < 156e65bd29307f5053835bff60bc1ba342fa010f |
| Linux · Linux | affected 3.10 ; unaffected 0 < 3.10 ; unaffected 5.10.270 ≤ 5.10.* ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |