CVE-2021-47295 - CVE House
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Status published Unknown CVE-2021-47295

net: sched: fix memory leak in tcindex_partial_destroy_work

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix memory leak in tcindex_partial_destroy_work Syzbot reported memory leak in tcindex_set_parms(). The problem was in non-freed perfect hash in tcindex_partial_destroy_work(). In tcindex_set_parms() new tcindex_data is allocated and some fields from old one are copied to new one, but not the perfect hash. Since tcindex_partial_destroy_work() is the destroy function for old tcindex_data, we need to free perfect hash to avoid memory leak.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
331b72922c5f58d48fd5500acadc91777cc31970, 3.18, 0, 4.14.308, 4.19.276, 5.4.136, 5.4.235, 5.10.54, 5.10.173, 5.13.6, 5.15.100, 6.1.18, 6.2.5, 5.14

Timeline

Official Publish: May 21st, 2024
Last Modified: May 11th, 2026
Added to House: July 21st, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.