PT-2024-11415 · Linux+2 · Linux Kernel+2
Syzbot
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Published
2021-10-04
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Updated
2024-11-01
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CVE-2021-47419
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.14.0-rc6-syzkaller
Description
The issue is related to the
sch taprio module in the Linux kernel, where a timer is not properly canceled when the taprio destroy() function is called. This can lead to a use-after-free error, potentially causing a system crash or allowing an attacker to execute arbitrary code. The vulnerability was reported by syzbot and is related to the qdisc create() function not calling ops->reset() in some cases.Recommendations
To resolve this issue, update the Linux kernel to a version that includes the fix for the
sch taprio module. Specifically, update to a version later than 5.14.0-rc6-syzkaller. If an update is not possible, consider disabling the sch taprio module as a temporary workaround to prevent potential exploitation.Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse