CVE-2020-36776

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

thermal/drivers/cpufreq_cooling: Fix slab OOB issue

Slab OOB issue is scanned by KASAN in cpu_power_to_freq(). If power is limited below the power of OPP0 in EM table, it will cause slab out-of-bound issue with negative array index.

Return the lowest frequency if limited power cannot found a suitable OPP in EM table to fix this issue.

Backtrace: [<ffffffd02d2a37f0>] die+0x104/0x5ac [<ffffffd02d2a5630>] bug_handler+0x64/0xd0 [<ffffffd02d288ce4>] brk_handler+0x160/0x258 [<ffffffd02d281e5c>] do_debug_exception+0x248/0x3f0 [<ffffffd02d284488>] el1_dbg+0x14/0xbc [<ffffffd02d75d1d4>] __kasan_report+0x1dc/0x1e0 [<ffffffd02d75c2e0>] kasan_report+0x10/0x20 [<ffffffd02d75def8>] __asan_report_load8_noabort+0x18/0x28 [<ffffffd02e6fce5c>] cpufreq_power2state+0x180/0x43c [<ffffffd02e6ead80>] power_actor_set_power+0x114/0x1d4 [<ffffffd02e6fac24>] allocate_power+0xaec/0xde0 [<ffffffd02e6f9f80>] power_allocator_throttle+0x3ec/0x5a4 [<ffffffd02e6ea888>] handle_thermal_trip+0x160/0x294 [<ffffffd02e6edd08>] thermal_zone_device_check+0xe4/0x154 [<ffffffd02d351cb4>] process_one_work+0x5e4/0xe28 [<ffffffd02d352f44>] worker_thread+0xa4c/0xfac [<ffffffd02d360124>] kthread+0x33c/0x358 [<ffffffd02d289940>] ret_from_fork+0xc/0x18

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-129

Affected software

VendorProductVersions
LinuxLinux>= 371a3bc79c11b707d7a1b7a2c938dc3cc042fffb, < c24a20912eef00587416628149c438e885eb1304; >= 371a3bc79c11b707d7a1b7a2c938dc3cc042fffb, < 876a5f33e5d961d879c5436987c09b3d9ef70379; >= 371a3bc79c11b707d7a1b7a2c938dc3cc042fffb, < 6bf443acf6ca4f666d0e4225614ba9993a3aa1a9; >= 371a3bc79c11b707d7a1b7a2c938dc3cc042fffb, < 34ab17cc6c2c1ac93d7e5d53bb972df9a968f085; 39e0651cac9c80865b2838f297f95ffc0f34a1d8; febe56f21371ba1e51e8586c3ddf8f54fc62fe61; d3b7bacd1115400b94482dfc7efffc175c29b831; 9006b543384ab10902819364c1205f11a1458571; >= 4.14.189, < 4.15; >= 4.19.134, < 4.20; >= 5.4.53, < 5.5; >= 5.7.8, < 5.8
LinuxLinux5.8

References

Timeline

Published
Feb 27, 2024
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2020

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CVE-2020-36776: Medium severity, CVSS 5.5 | Vulnix