hwmon: (occ) Fix division by zero in occ_show_power_1() (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.12 % · centile 2 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (occ) Fix division by zero in occ_show_power_1() In occ_show_power_1() case 1, the accumulator is divided by update_tag without checking for zero. If no samples have been collected yet (e.g. during early boot when the sensor block is included but hasn't been updated), update_tag is zero, causing a kernel divide-by-zero crash. The 2019 fix in commit 211186cae14d ("hwmon: (occ) Fix division by zero issue") only addressed occ_get_powr_avg() used by occ_show_power_2() and occ_show_power_a0(). This separate code path in occ_show_power_1() was missed. Fix this by reusing the existing occ_get_powr_avg() helper, which already handles the zero-sample case and uses mul_u64_u32_div() to multiply before dividing for better precision. Move the helper above occ_show_power_1() so it is visible at the call site. [groeck: Fix alignment problems reported by checkpatch]
Faiblesses (CWE)
- CWE-369 — Division par zéro
Références
- https://git.kernel.org/stable/c/c7d3712362c8ab8f82f441b649d9e446e7b9aa9d
- https://git.kernel.org/stable/c/53e6175756b8c474b6247bbcea0aad3d68357475
- https://git.kernel.org/stable/c/2502684b9e835de9a992ec47c3e6c6faabe3858d
- https://git.kernel.org/stable/c/37ae8fadc74ed68e5bc364ffd17746d88e449ae3
- https://git.kernel.org/stable/c/bbbefc48f6617cfb738dcff7f44beb50b5dfeb38
- https://git.kernel.org/stable/c/243d55bd3f08cb15eee9d63f4716d4d4cdd760f5
- https://git.kernel.org/stable/c/7b89ce0c98bf3015f493ca4285b2d1056cd8c733
- https://git.kernel.org/stable/c/39e2a5bf970402a8530a319cf06122e216ba57b8
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
Références européennes
- ENISA EUVD · EUVD-2026-26583
- GCVE · GCVE-0-2026-31770
Avis du CERT-FR
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1093 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1066 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1064 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0985 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0954 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0927 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0926 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0696 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0548 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0547 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.0 < 5.10.253cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.203cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.168cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.134cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.81cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.18.22cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19 < 6.19.12cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected c10e753d43ebd1d17e1c62bcee20c6124c2c7cca < c7d3712362c8ab8f82f441b649d9e446e7b9aa9d ; affected c10e753d43ebd1d17e1c62bcee20c6124c2c7cca < 53e6175756b8c474b6247bbcea0aad3d68357475 ; affected c10e753d43ebd1d17e1c62bcee20c6124c2c7cca < 2502684b9e835de9a992ec47c3e6c6faabe3858d ; affected c10e753d43ebd1d17e1c62bcee20c6124c2c7cca < 37ae8fadc74ed68e5bc364ffd17746d88e449ae3 ; affected c10e753d43ebd1d17e1c62bcee20c6124c2c7cca < bbbefc48f6617cfb738dcff7f44beb50b5dfeb38 ; affected c10e753d43ebd1d17e1c62bcee20c6124c2c7cca < 243d55bd3f08cb15eee9d63f4716d4d4cdd760f5 |
| Linux · Linux | affected 5.0 ; unaffected 0 < 5.0 ; unaffected 5.10.253 ≤ 5.10.* ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.168 ≤ 6.1.* ; unaffected 6.6.134 ≤ 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 |