CVE-2026-31770
Estado: AnalizadaMedia (5.5)—
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.
Leer descripción completaMostrar menos
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]
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-369
Referencias
- https://git.kernel.org/stable/c/243d55bd3f08cb15eee9d63f4716d4d4cdd760f5
- https://git.kernel.org/stable/c/2502684b9e835de9a992ec47c3e6c6faabe3858d
- https://git.kernel.org/stable/c/37ae8fadc74ed68e5bc364ffd17746d88e449ae3
- https://git.kernel.org/stable/c/39e2a5bf970402a8530a319cf06122e216ba57b8
- https://git.kernel.org/stable/c/53e6175756b8c474b6247bbcea0aad3d68357475
- https://git.kernel.org/stable/c/7b89ce0c98bf3015f493ca4285b2d1056cd8c733
- https://git.kernel.org/stable/c/bbbefc48f6617cfb738dcff7f44beb50b5dfeb38
- https://git.kernel.org/stable/c/c7d3712362c8ab8f82f441b649d9e446e7b9aa9d
JSON original (NVD)
Mostrar
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