CVE-2021-47321
published 2024-05-21CVE-2021-47321: In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's remove path…
PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.25%
16.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
watchdog: Fix possible use-after-free by calling del_timer_sync()
This driver's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.
Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.6-1 (bookworm) | linux 5.14.6-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 58606882ad8ec6c39e0f40344b922921ef94ab4d | 58606882ad8ec6c39e0f40344b922921ef94ab4d |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < ca96b8ea5e74956071154bdb456778cc3027e79f | ca96b8ea5e74956071154bdb456778cc3027e79f |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 8bec568d7518b1504a602ed5376bb322e4dbb270 | 8bec568d7518b1504a602ed5376bb322e4dbb270 |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < ecd620e0fb1ff7f78fdb593379b2e6938c99707a | ecd620e0fb1ff7f78fdb593379b2e6938c99707a |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < db222f1477ad5692cd454709b714949807e5d111 | db222f1477ad5692cd454709b714949807e5d111 |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 | 66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 4c05dac488a660fe2925c047ecb119e7afaaeb1e | 4c05dac488a660fe2925c047ecb119e7afaaeb1e |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < 1a053c4d716898a53c2e31c574a70ea0c37044a3 | 1a053c4d716898a53c2e31c574a70ea0c37044a3 |
| linux | linux | >= 7c25f8c9f67708e6464d2221bc311cbd99e950dc < d0212f095ab56672f6f36aabc605bda205e1e0bf | d0212f095ab56672f6f36aabc605bda205e1e0bf |
| linux | linux_kernel | < 4.4.276 | 4.4.276 |
| linux | linux_kernel | >= 0 < 5.10.70-1 | 5.10.70-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 4.10 < 4.14.240 | 4.14.240 |
| linux | linux_kernel | >= 4.15 < 4.19.198 | 4.19.198 |
| linux | linux_kernel | >= 4.20 < 5.4.134 | 5.4.134 |
| linux | linux_kernel | >= 4.5 < 4.9.276 | 4.9.276 |
| linux | linux_kernel | >= 5.11 < 5.12.9 | 5.12.9 |
| linux | linux_kernel | >= 5.13 < 5.13.4 | 5.13.4 |
| linux | linux_kernel | >= 5.5 < 5.10.52 | 5.10.52 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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GHSA
GHSA-fhjr-hghh-2jv9: In the Linux kernel, the following vulnerability has been resolved:
watchdog: Fix possible use-after-free by calling del_timer_sync()
This driver's
ghsa_unreviewed·2024-05-21
CVE-2021-47321 [HIGH] CWE-416 GHSA-fhjr-hghh-2jv9: In the Linux kernel, the following vulnerability has been resolved:
watchdog: Fix possible use-after-free by calling del_timer_sync()
This driver's
In the Linux kernel, the following vulnerability has been resolved:
watchdog: Fix possible use-after-free by calling del_timer_sync()
This driver's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.
Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.
OSV
CVE-2021-47321: In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's re
osv·2024-05-21·CVSS 7.8
CVE-2021-47321 [HIGH] CVE-2021-47321: In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's re
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Red Hat
kernel: watchdog: Fix possible use-after-free by calling del_timer_sync()
vendor_redhat·2024-05-21·CVSS 7.8
CVE-2021-47321 [HIGH] CWE-416 kernel: watchdog: Fix possible use-after-free by calling del_timer_sync()
kernel: watchdog: Fix possible use-after-free by calling del_timer_sync()
In the Linux kernel, the following vulnerability has been resolved:
watchdog: Fix possible use-after-free by calling del_timer_sync()
This driver's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.
Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.
A vulnerability was found in the del_timer() function in the Linux kernel's watchdog driver. This issue occurs because the function does not wait for the timer handler to finish, which may lead to a situation where
Debian
CVE-2021-47321: linux - In the Linux kernel, the following vulnerability has been resolved: watchdog: F...
vendor_debian·2021·CVSS 7.8
CVE-2021-47321 [HIGH] CVE-2021-47321: linux - In the Linux kernel, the following vulnerability has been resolved: watchdog: F...
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Scope: local
bookworm: resolved (fixed in 5.14.6-1)
bullseye: resolved (fixed in 5.10.70-1)
forky: resolved (fixed in 5.14.6-1)
sid: resolved (fixed in 5.14.6-1)
trixie: resolved (fixed in 5.14.6-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1ehttps://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4dhttps://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79fhttps://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bfhttps://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707ahttps://git.kernel.org/stable/c/1a053c4d716898a53c2e31c574a70ea0c37044a3https://git.kernel.org/stable/c/4c05dac488a660fe2925c047ecb119e7afaaeb1ehttps://git.kernel.org/stable/c/58606882ad8ec6c39e0f40344b922921ef94ab4dhttps://git.kernel.org/stable/c/66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4https://git.kernel.org/stable/c/8bec568d7518b1504a602ed5376bb322e4dbb270https://git.kernel.org/stable/c/ca96b8ea5e74956071154bdb456778cc3027e79fhttps://git.kernel.org/stable/c/d0212f095ab56672f6f36aabc605bda205e1e0bfhttps://git.kernel.org/stable/c/db222f1477ad5692cd454709b714949807e5d111https://git.kernel.org/stable/c/ecd620e0fb1ff7f78fdb593379b2e6938c99707a
2024-05-21
Published