PT-2024-11353 · Linux+6 · Linux Kernel+6
Hulk Robot
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Published
2021-05-11
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Updated
2024-08-20
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CVE-2021-47356
CVSS v3.1
7.7
High
| Vector | AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a possible use-after-free in the HFC cleanup() function of the mISDN module. This occurs because the module's remove path calls del timer(), which does not wait until the timer handler finishes, potentially resulting in a use-after-free. The fix involves calling del timer sync() to ensure the timer handler has finished and cannot re-schedule itself.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Almalinux
Astra Linux
Centos
Linux Kernel
Red Hat
Rocky Linux
Suse