{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31770","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.140Z","datePublished":"2026-05-01T14:14:59.256Z","dateUpdated":"2026-05-11T22:15:28.590Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:15:28.590Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (occ) Fix division by zero in occ_show_power_1()\n\nIn occ_show_power_1() case 1, the accumulator is divided by\nupdate_tag without checking for zero. If no samples have been\ncollected yet (e.g. during early boot when the sensor block is\nincluded but hasn't been updated), update_tag is zero, causing\na kernel divide-by-zero crash.\n\nThe 2019 fix in commit 211186cae14d (\"hwmon: (occ) Fix division by\nzero issue\") only addressed occ_get_powr_avg() used by\nocc_show_power_2() and occ_show_power_a0(). This separate code\npath in occ_show_power_1() was missed.\n\nFix this by reusing the existing occ_get_powr_avg() helper, which\nalready handles the zero-sample case and uses mul_u64_u32_div()\nto multiply before dividing for better precision. Move the helper\nabove occ_show_power_1() so it is visible at the call site.\n\n[groeck: Fix alignment problems reported by checkpatch]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/occ/common.c"],"versions":[{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"c7d3712362c8ab8f82f441b649d9e446e7b9aa9d","status":"affected","versionType":"git"},{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"53e6175756b8c474b6247bbcea0aad3d68357475","status":"affected","versionType":"git"},{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"2502684b9e835de9a992ec47c3e6c6faabe3858d","status":"affected","versionType":"git"},{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"37ae8fadc74ed68e5bc364ffd17746d88e449ae3","status":"affected","versionType":"git"},{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"bbbefc48f6617cfb738dcff7f44beb50b5dfeb38","status":"affected","versionType":"git"},{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"243d55bd3f08cb15eee9d63f4716d4d4cdd760f5","status":"affected","versionType":"git"},{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"7b89ce0c98bf3015f493ca4285b2d1056cd8c733","status":"affected","versionType":"git"},{"version":"c10e753d43ebd1d17e1c62bcee20c6124c2c7cca","lessThan":"39e2a5bf970402a8530a319cf06122e216ba57b8","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/occ/common.c"],"versions":[{"version":"5.0","status":"affected"},{"version":"0","lessThan":"5.0","status":"unaffected","versionType":"semver"},{"version":"5.10.253","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.134","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.81","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.22","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.12","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c7d3712362c8ab8f82f441b649d9e446e7b9aa9d"},{"url":"https://git.kernel.org/stable/c/53e6175756b8c474b6247bbcea0aad3d68357475"},{"url":"https://git.kernel.org/stable/c/2502684b9e835de9a992ec47c3e6c6faabe3858d"},{"url":"https://git.kernel.org/stable/c/37ae8fadc74ed68e5bc364ffd17746d88e449ae3"},{"url":"https://git.kernel.org/stable/c/bbbefc48f6617cfb738dcff7f44beb50b5dfeb38"},{"url":"https://git.kernel.org/stable/c/243d55bd3f08cb15eee9d63f4716d4d4cdd760f5"},{"url":"https://git.kernel.org/stable/c/7b89ce0c98bf3015f493ca4285b2d1056cd8c733"},{"url":"https://git.kernel.org/stable/c/39e2a5bf970402a8530a319cf06122e216ba57b8"}],"title":"hwmon: (occ) Fix division by zero in occ_show_power_1()","x_generator":{"engine":"bippy-1.2.0"}}}}