CVE-2020-36776

thermal/drivers/cpufreq_cooling: Fix slab OOB issue

State: Published
Severity: Not scored
Published: Feb 27, 2024
Updated: May 23, 2026
Reserved: Feb 26, 2024

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

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before c24a20912eef00587416628149c438e885eb1304Affected 371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before 876a5f33e5d961d879c5436987c09b3d9ef70379Affected 371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before 6bf443acf6ca4f666d0e4225614ba9993a3aa1a9Affected 371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before 34ab17cc6c2c1ac93d7e5d53bb972df9a968f085Affected 39e0651cac9c80865b2838f297f95ffc0f34a1d8Affected febe56f21371ba1e51e8586c3ddf8f54fc62fe61Affected d3b7bacd1115400b94482dfc7efffc175c29b831Affected 9006b543384ab10902819364c1205f11a1458571Affected 4.14.189 to before 4.15Affected 4.19.134 to before 4.20Affected 5.4.53 to before 5.5Affected 5.7.8 to before 5.8Affected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.36 through 5.10.Not affected 5.11.20 through 5.11.Not affected 5.12.3 through 5.12.*Not affected 5.13 and laterNot affected

Product

Versions

LinuxLinux

371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before c24a20912eef00587416628149c438e885eb1304Affected
371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before 876a5f33e5d961d879c5436987c09b3d9ef70379Affected
371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before 6bf443acf6ca4f666d0e4225614ba9993a3aa1a9Affected
371a3bc79c11b707d7a1b7a2c938dc3cc042fffb to before 34ab17cc6c2c1ac93d7e5d53bb972df9a968f085Affected
39e0651cac9c80865b2838f297f95ffc0f34a1d8Affected
febe56f21371ba1e51e8586c3ddf8f54fc62fe61Affected
d3b7bacd1115400b94482dfc7efffc175c29b831Affected
9006b543384ab10902819364c1205f11a1458571Affected
4.14.189 to before 4.15Affected
4.19.134 to before 4.20Affected
5.4.53 to before 5.5Affected
5.7.8 to before 5.8Affected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.36 through 5.10.*Not affected
5.11.20 through 5.11.*Not affected
5.12.3 through 5.12.*Not affected
5.13 and laterNot affected

References

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