net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.12 % · percentile 2 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size bcm_sf2_cfp_rule_get_all() walks the whole cfp.unique bitmap into rule_locs[] without consulting nfc->rule_cnt, which is how many entries the caller had room for. ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the buffer from the rule_cnt userspace passes in, so once an admin has installed CFP rules any user can ask for fewer slots than there are rules and run off the end of the allocation. A rule_cnt of 0 leaves the buffer pointer NULL and the walk dereferences it.
References
- https://git.kernel.org/stable/c/ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e
- https://git.kernel.org/stable/c/8e41ce02589c92356bfd8ef62f6ceff840546e1a
- https://git.kernel.org/stable/c/f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4
- https://git.kernel.org/stable/c/f5e93162b3dd195bfda815e8f7a39aaf1d45437b
- https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c
- https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707
- https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5
- https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-86683
- GCVE · GCVE-0-2026-98030
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-1372 — Multiples vulnérabilités dans les produits SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1335 — Multiples vulnérabilités dans le noyau Linux de SUSE · 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 7318166cacad158b46240f66250d7cc5a481653b < ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e ; affected 7318166cacad158b46240f66250d7cc5a481653b < 8e41ce02589c92356bfd8ef62f6ceff840546e1a ; affected 7318166cacad158b46240f66250d7cc5a481653b < f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4 ; affected 7318166cacad158b46240f66250d7cc5a481653b < f5e93162b3dd195bfda815e8f7a39aaf1d45437b ; affected 7318166cacad158b46240f66250d7cc5a481653b < f1a2869b3629c0e8394b77b38cb9f19a018c653c ; affected 7318166cacad158b46240f66250d7cc5a481653b < fd1a78c16b1f6978c09cf048e15f349732e4c707 |
| Linux · Linux | affected 4.11 ; unaffected 0 < 4.11 ; unaffected 5.10.271 ≤ 5.10.* ; unaffected 5.15.222 ≤ 5.15.* ; unaffected 6.1.189 ≤ 6.1.* ; unaffected 6.6.158 ≤ 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 |