CVE-2021-47295

Advisory lineage Upstream: 0 Downstream: 5
Modified
Published: 21 May 2024, 14:35
Last modified:11 May 2026, 13:51

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.1% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 May 2024, 14:35
Published
Vulnerability first disclosed
11 May 2026, 13:51
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.10%• Percentile: 28%

Techniques & Countermeasures

  • CWE-400•Uncontrolled Resource Consumption

    The product does not properly control the allocation and maintenance of a limited resource.

Affected Systems

  • linux•linux

    ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 53af9c793f644d5841d84d8e0ad83bd7ab47f3e0 | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 8d7924ce85bae64e7a67c366c7c50840f49f3a62 | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 7a6fb69bbcb21e9ce13bdf18c008c268874f0480 | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 8e9662fde6d63c78eb1350f6167f64c9d71a865b | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6 | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < cac71d27745f92ee13f0ecc668ffe151a4a9c9b1 | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < f5051bcece50140abd1a11a2d36dc3ec5484fc32 | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 7c183dc0af472dec33d2c0786a5e356baa8cad19 | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 3abebc503a5148072052c229c6b04b329a420ecd | ≥ 331b72922c5f58d48fd5500acadc91777cc31970, < 372ae77cf11d11fb118cbe2d37def9dd5f826abd | 3.18

  • linux•linux_kernel

    ≥ 3.18, < 5.4.136 | ≥ 5.5, < 5.10.54 | ≥ 5.11, < 5.13.6 | 5.14:rc1 | 5.14:rc2

References (11)