CVE-2020-36787
published 2024-02-28CVE-2020-36787: In the Linux kernel, the following vulnerability has been resolved: media: aspeed: fix clock handling logic Video engine uses eclk and vclk for its clock…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
14.0th percentile
In the Linux kernel, the following vulnerability has been resolved:
media: aspeed: fix clock handling logic
Video engine uses eclk and vclk for its clock sources and its reset
control is coupled with eclk so the current clock enabling sequence works
like below.
Enable eclk
De-assert Video Engine reset
10ms delay
Enable vclk
It introduces improper reset on the Video Engine hardware and eventually
the hardware generates unexpected DMA memory transfers that can corrupt
memory region in random and sporadic patterns. This issue is observed
very rarely on some specific AST2500 SoCs but it causes a critical
kernel panic with making a various shape of signature so it's extremely
hard to debug. Moreover, the issue is observed even when the video
engine is not actively used because udevd turns on the video engine
hardware for a short time to make a query in every boot.
To fix this issue, this commit changes the clock handling logic to make
the reset de-assertion triggered after enabling both eclk and vclk. Also,
it adds clk_unprepare call for a case when probe fails.
clk: ast2600: fix reset settings for eclk and vclk
Video engine reset setting should be coupled with eclk to match it
with the setting for previous Aspeed SoCs which is defined in
clk-aspeed.c since all Aspeed SoCs are sharing a single video engine
driver. Also, reset bit 6 is defined as 'Video Engine' reset in
datasheet so it should be de-asserted when eclk is enabled. This
commit fixes the setting.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.38-1 (bookworm) | linux 5.10.38-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= d2b4387f3bdf016e266d23cf657465f557721488 < 1dc1d30ac101bb8335d9852de2107af60c2580e7 | 1dc1d30ac101bb8335d9852de2107af60c2580e7 |
| linux | linux | >= d2b4387f3bdf016e266d23cf657465f557721488 < a59d01384c80a8a4392665802df57c3df20055f5 | a59d01384c80a8a4392665802df57c3df20055f5 |
| linux | linux | >= d2b4387f3bdf016e266d23cf657465f557721488 < 2964c37563e86cfdc439f217eb3c5a69adfdba6a | 2964c37563e86cfdc439f217eb3c5a69adfdba6a |
| linux | linux | >= d2b4387f3bdf016e266d23cf657465f557721488 < 75321dc8aebe3f30eff226028fe6da340fe0bf02 | 75321dc8aebe3f30eff226028fe6da340fe0bf02 |
| linux | linux | >= d2b4387f3bdf016e266d23cf657465f557721488 < 3536169f8531c2c5b153921dc7d1ac9fd570cda7 | 3536169f8531c2c5b153921dc7d1ac9fd570cda7 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 5.0 < 5.4.119 | 5.4.119 |
| linux | linux_kernel | >= 5.11 < 5.11.21 | 5.11.21 |
| linux | linux_kernel | >= 5.12 < 5.12.4 | 5.12.4 |
| linux | linux_kernel | >= 5.5 < 5.10.37 | 5.10.37 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: media: aspeed: fix clock handling logic
vendor_redhat·2024-02-28·CVSS 5.5
CVE-2020-36787 [MEDIUM] CWE-20 kernel: media: aspeed: fix clock handling logic
kernel: media: aspeed: fix clock handling logic
In the Linux kernel, the following vulnerability has been resolved:
media: aspeed: fix clock handling logic
Video engine uses eclk and vclk for its clock sources and its reset
control is coupled with eclk so the current clock enabling sequence works
like below.
Enable eclk
De-assert Video Engine reset
10ms delay
Enable vclk
It introduces improper reset on the Video Engine hardware and eventually
the hardware generates unexpected DMA memory transfers that can corrupt
memory region in random and sporadic patterns. This issue is observed
very rarely on some specific AST2500 SoCs but it causes a critical
kernel panic with making a various shape of signature so it's extremely
hard to debug. Moreover, the issue is observed even when the video
engi
Debian
CVE-2020-36787: linux - In the Linux kernel, the following vulnerability has been resolved: media: aspe...
vendor_debian·2020·CVSS 5.5
CVE-2020-36787 [MEDIUM] CVE-2020-36787: linux - In the Linux kernel, the following vulnerability has been resolved: media: aspe...
In the Linux kernel, the following vulnerability has been resolved: media: aspeed: fix clock handling logic Video engine uses eclk and vclk for its clock sources and its reset control is coupled with eclk so the current clock enabling sequence works like below. Enable eclk De-assert Video Engine reset 10ms delay Enable vclk It introduces improper reset on the Video Engine hardware and eventually the hardware generates unexpected DMA memory transfers that can corrupt memory region in random and sporadic patterns. This issue is observed very rarely on some specific AST2500 SoCs but it causes a critical kernel panic with making a various shape of signature so it's extremely hard to debug. Moreover, the issue is observed even when the video engine is not actively used because udevd turns on th
OSV
CVE-2020-36787: In the Linux kernel, the following vulnerability has been resolved: media: aspeed: fix clock handling logic Video engine uses eclk and vclk for its cl
osv·2024-02-28·CVSS 5.5
CVE-2020-36787 [MEDIUM] CVE-2020-36787: In the Linux kernel, the following vulnerability has been resolved: media: aspeed: fix clock handling logic Video engine uses eclk and vclk for its cl
In the Linux kernel, the following vulnerability has been resolved: media: aspeed: fix clock handling logic Video engine uses eclk and vclk for its clock sources and its reset control is coupled with eclk so the current clock enabling sequence works like below. Enable eclk De-assert Video Engine reset 10ms delay Enable vclk It introduces improper reset on the Video Engine hardware and eventually the hardware generates unexpected DMA memory transfers that can corrupt memory region in random and sporadic patterns. This issue is observed very rarely on some specific AST2500 SoCs but it causes a critical kernel panic with making a various shape of signature so it's extremely hard to debug. Moreover, the issue is observed even when the video engine is not actively used because udevd turns on th
GHSA
GHSA-9hx5-6xv8-6w7c: In the Linux kernel, the following vulnerability has been resolved:
media: aspeed: fix clock handling logic
Video engine uses eclk and vclk for its
ghsa_unreviewed·2024-02-28
CVE-2020-36787 [MEDIUM] GHSA-9hx5-6xv8-6w7c: In the Linux kernel, the following vulnerability has been resolved:
media: aspeed: fix clock handling logic
Video engine uses eclk and vclk for its
In the Linux kernel, the following vulnerability has been resolved:
media: aspeed: fix clock handling logic
Video engine uses eclk and vclk for its clock sources and its reset
control is coupled with eclk so the current clock enabling sequence works
like below.
Enable eclk
De-assert Video Engine reset
10ms delay
Enable vclk
It introduces improper reset on the Video Engine hardware and eventually
the hardware generates unexpected DMA memory transfers that can corrupt
memory region in random and sporadic patterns. This issue is observed
very rarely on some specific AST2500 SoCs but it causes a critical
kernel panic with making a various shape of signature so it's extremely
hard to debug. Moreover, the issue is observed even when the video
engine is not actively used because udevd turns o
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/1dc1d30ac101bb8335d9852de2107af60c2580e7https://git.kernel.org/stable/c/2964c37563e86cfdc439f217eb3c5a69adfdba6ahttps://git.kernel.org/stable/c/3536169f8531c2c5b153921dc7d1ac9fd570cda7https://git.kernel.org/stable/c/75321dc8aebe3f30eff226028fe6da340fe0bf02https://git.kernel.org/stable/c/a59d01384c80a8a4392665802df57c3df20055f5https://git.kernel.org/stable/c/1dc1d30ac101bb8335d9852de2107af60c2580e7https://git.kernel.org/stable/c/2964c37563e86cfdc439f217eb3c5a69adfdba6ahttps://git.kernel.org/stable/c/3536169f8531c2c5b153921dc7d1ac9fd570cda7https://git.kernel.org/stable/c/75321dc8aebe3f30eff226028fe6da340fe0bf02https://git.kernel.org/stable/c/a59d01384c80a8a4392665802df57c3df20055f5
2024-02-28
Published