CVE-2021-47356
published 2024-05-21CVE-2021-47356: In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module's remove path calls…
PriorityP337high7.7CVSS 3.1
AVLACLPRNUINSUCNIHAH
EPSS
0.27%
18.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
mISDN: fix possible use-after-free in HFC_cleanup()
This module'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 | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < 49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe | 49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < 54ff3202928952a100c477248e65ac6db01258a7 | 54ff3202928952a100c477248e65ac6db01258a7 |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < 7867ddc5f3de7f289aee63233afc0df4b62834c5 | 7867ddc5f3de7f289aee63233afc0df4b62834c5 |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < 5f2818185da0fe82a932f0856633038b66faf124 | 5f2818185da0fe82a932f0856633038b66faf124 |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < 3ecd228c636ee17c14662729737fa07242a93cb0 | 3ecd228c636ee17c14662729737fa07242a93cb0 |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d | b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < 61370ff07e0acc657559a8fac02551dfeb9d3020 | 61370ff07e0acc657559a8fac02551dfeb9d3020 |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda | ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda |
| linux | linux | >= 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 < 009fc857c5f6fda81f2f7dd851b2d54193a8e733 | 009fc857c5f6fda81f2f7dd851b2d54193a8e733 |
| 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 < 5.4.133 | 5.4.133 |
| linux | linux_kernel | >= 4.5 < 4.9.276 | 4.9.276 |
| linux | linux_kernel | >= 5.11 < 5.12.18 | 5.12.18 |
| linux | linux_kernel | >= 5.13 < 5.13.3 | 5.13.3 |
| linux | linux_kernel | >= 5.5 < 5.10.51 | 5.10.51 |
CVSS provenance
nvdv3.17.7HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
osv7.7HIGH
vendor_debian7.7HIGH
vendor_redhat7.7HIGH
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OSV
CVE-2021-47356: In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module's remove path call
osv·2024-05-21·CVSS 7.7
CVE-2021-47356 [HIGH] CVE-2021-47356: In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module's remove path call
In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module'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.
GHSA
GHSA-74qf-46c3-qxv8: In the Linux kernel, the following vulnerability has been resolved:
mISDN: fix possible use-after-free in HFC_cleanup()
This module's remove path ca
ghsa_unreviewed·2024-05-21
CVE-2021-47356 [HIGH] CWE-416 GHSA-74qf-46c3-qxv8: In the Linux kernel, the following vulnerability has been resolved:
mISDN: fix possible use-after-free in HFC_cleanup()
This module's remove path ca
In the Linux kernel, the following vulnerability has been resolved:
mISDN: fix possible use-after-free in HFC_cleanup()
This module'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: mISDN: fix possible use-after-free in HFC_cleanup()
vendor_redhat·2024-05-21·CVSS 7.7
CVE-2021-47356 [HIGH] CWE-416 kernel: mISDN: fix possible use-after-free in HFC_cleanup()
kernel: mISDN: fix possible use-after-free in HFC_cleanup()
In the Linux kernel, the following vulnerability has been resolved:
mISDN: fix possible use-after-free in HFC_cleanup()
This module'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 Linux kernel's mISDN driver. This issue arises during the cleanup process, where a timer handler might still be running after the driver has been removed, which can lead to a use-after-free issue, potentially
Debian
CVE-2021-47356: linux - In the Linux kernel, the following vulnerability has been resolved: mISDN: fix ...
vendor_debian·2021·CVSS 7.7
CVE-2021-47356 [HIGH] CVE-2021-47356: linux - In the Linux kernel, the following vulnerability has been resolved: mISDN: fix ...
In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module'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/009fc857c5f6fda81f2f7dd851b2d54193a8e733https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbehttps://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802dhttps://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cdahttps://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbehttps://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802dhttps://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda
2024-05-21
Published