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]

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

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Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/243d55bd3f08cb15eee9d63f4716d4d4cdd760f5 cve-icon cve-icon
https://git.kernel.org/stable/c/2502684b9e835de9a992ec47c3e6c6faabe3858d cve-icon cve-icon
https://git.kernel.org/stable/c/37ae8fadc74ed68e5bc364ffd17746d88e449ae3 cve-icon cve-icon
https://git.kernel.org/stable/c/39e2a5bf970402a8530a319cf06122e216ba57b8 cve-icon cve-icon
https://git.kernel.org/stable/c/53e6175756b8c474b6247bbcea0aad3d68357475 cve-icon cve-icon
https://git.kernel.org/stable/c/7b89ce0c98bf3015f493ca4285b2d1056cd8c733 cve-icon cve-icon
https://git.kernel.org/stable/c/bbbefc48f6617cfb738dcff7f44beb50b5dfeb38 cve-icon cve-icon
https://git.kernel.org/stable/c/c7d3712362c8ab8f82f441b649d9e446e7b9aa9d cve-icon cve-icon
History

Fri, 01 May 2026 14:45:00 +0000

Type Values Removed Values Added
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]
Title hwmon: (occ) Fix division by zero in occ_show_power_1()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-01T14:14:59.256Z

Reserved: 2026-03-09T15:48:24.140Z

Link: CVE-2026-31770

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-01T15:16:40.200

Modified: 2026-05-01T15:24:14.893

Link: CVE-2026-31770

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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