# CVE-2021-47295: linux: In the Linux kernel, the following vulnerability has been resolved:  net: sched: fix memory leak in tcindex_partial_d...

CVE-2021-47295 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47295, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47295
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0150
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-47295](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47295.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-47295](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47295.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-47295](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47295.md) | May 21, 2024 |

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