CVE-2021-47439
published 2024-05-22CVE-2021-47439: In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the ksz…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
13.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
When the ksz module is installed and removed using rmmod, kernel crashes
with null pointer dereferrence error. During rmmod, ksz_switch_remove
function tries to cancel the mib_read_workqueue using
cancel_delayed_work_sync routine and unregister switch from dsa.
During dsa_unregister_switch it calls ksz_mac_link_down, which in turn
reschedules the workqueue since mib_interval is non-zero.
Due to which queue executed after mib_interval and it tries to access
dp->slave. But the slave is unregistered in the ksz_switch_remove
function. Hence kernel crashes.
To avoid this crash, before canceling the workqueue, resetted the
mib_interval to 0.
v1 -> v2:
-Removed the if condition in ksz_mib_read_work
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.16-1 (bookworm) | linux 5.14.16-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 469b390e1ba330e888175e55d78573db2e9a8cb4 < f2e1de075018cf71bcd7d628e9f759cb8540b0c3 | f2e1de075018cf71bcd7d628e9f759cb8540b0c3 |
| linux | linux | >= 469b390e1ba330e888175e55d78573db2e9a8cb4 < 383239a33cf29ebee9ce0d4e0e5c900b77a16148 | 383239a33cf29ebee9ce0d4e0e5c900b77a16148 |
| linux | linux | >= 469b390e1ba330e888175e55d78573db2e9a8cb4 < ef1100ef20f29aec4e62abeccdb5bdbebba1e378 | ef1100ef20f29aec4e62abeccdb5bdbebba1e378 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.84-1 | 5.10.84-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 0 < 5.14.16-1 | 5.14.16-1 |
| linux | linux_kernel | >= 5.11 < 5.14.14 | 5.14.14 |
| linux | linux_kernel | >= 5.7 < 5.10.75 | 5.10.75 |
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: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
vendor_redhat·2024-05-22·CVSS 5.5
CVE-2021-47439 [MEDIUM] CWE-476 kernel: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
kernel: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
When the ksz module is installed and removed using rmmod, kernel crashes
with null pointer dereferrence error. During rmmod, ksz_switch_remove
function tries to cancel the mib_read_workqueue using
cancel_delayed_work_sync routine and unregister switch from dsa.
During dsa_unregister_switch it calls ksz_mac_link_down, which in turn
reschedules the workqueue since mib_interval is non-zero.
Due to which queue executed after mib_interval and it tries to access
dp->slave. But the slave is unregistered in the ksz_switch_remove
function. Hence kernel crashes.
To avoid this cr
Debian
CVE-2021-47439: linux - In the Linux kernel, the following vulnerability has been resolved: net: dsa: m...
vendor_debian·2021·CVSS 5.5
CVE-2021-47439 [MEDIUM] CVE-2021-47439: linux - In the Linux kernel, the following vulnerability has been resolved: net: dsa: m...
In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the ksz module is installed and removed using rmmod, kernel crashes with null pointer dereferrence error. During rmmod, ksz_switch_remove function tries to cancel the mib_read_workqueue using cancel_delayed_work_sync routine and unregister switch from dsa. During dsa_unregister_switch it calls ksz_mac_link_down, which in turn reschedules the workqueue since mib_interval is non-zero. Due to which queue executed after mib_interval and it tries to access dp->slave. But the slave is unregistered in the ksz_switch_remove function. Hence kernel crashes. To avoid this crash, before canceling the workqueue, resetted the mib_interval to 0. v1 -> v2: -Rem
OSV
CVE-2021-47439: In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the
osv·2024-05-22·CVSS 5.5
CVE-2021-47439 [MEDIUM] CVE-2021-47439: In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the
In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the ksz module is installed and removed using rmmod, kernel crashes with null pointer dereferrence error. During rmmod, ksz_switch_remove function tries to cancel the mib_read_workqueue using cancel_delayed_work_sync routine and unregister switch from dsa. During dsa_unregister_switch it calls ksz_mac_link_down, which in turn reschedules the workqueue since mib_interval is non-zero. Due to which queue executed after mib_interval and it tries to access dp->slave. But the slave is unregistered in the ksz_switch_remove function. Hence kernel crashes. To avoid this crash, before canceling the workqueue, resetted the mib_interval to 0. v1 -> v2: -Rem
GHSA
GHSA-35q9-qwff-qmh4: In the Linux kernel, the following vulnerability has been resolved:
net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
When t
ghsa_unreviewed·2024-05-22
CVE-2021-47439 [MEDIUM] CWE-476 GHSA-35q9-qwff-qmh4: In the Linux kernel, the following vulnerability has been resolved:
net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
When t
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
When the ksz module is installed and removed using rmmod, kernel crashes
with null pointer dereferrence error. During rmmod, ksz_switch_remove
function tries to cancel the mib_read_workqueue using
cancel_delayed_work_sync routine and unregister switch from dsa.
During dsa_unregister_switch it calls ksz_mac_link_down, which in turn
reschedules the workqueue since mib_interval is non-zero.
Due to which queue executed after mib_interval and it tries to access
dp->slave. But the slave is unregistered in the ksz_switch_remove
function. Hence kernel crashes.
To avoid this crash, before canceling the workqueue, resetted the
mib_interval to 0.
v1 -> v2:
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/383239a33cf29ebee9ce0d4e0e5c900b77a16148https://git.kernel.org/stable/c/ef1100ef20f29aec4e62abeccdb5bdbebba1e378https://git.kernel.org/stable/c/f2e1de075018cf71bcd7d628e9f759cb8540b0c3https://git.kernel.org/stable/c/383239a33cf29ebee9ce0d4e0e5c900b77a16148https://git.kernel.org/stable/c/ef1100ef20f29aec4e62abeccdb5bdbebba1e378https://git.kernel.org/stable/c/f2e1de075018cf71bcd7d628e9f759cb8540b0c3
2024-05-22
Published