VULNERABILITY INTELLIGENCE

CVE-2021-47295

CVSS score7.5 HIGH
EPSS probability1.50%
CISA KEVNot currently listed
Published2024-05-21
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-400

Primary references