# CVE-2021-4135: linux: A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the wa...

CVE-2021-4135 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-4135, released July 14, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-4135
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 14, 2022

## Description

A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.15-1 | [DEBIAN-CVE-2021-4135](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4135.md) | Jul 14, 2022 |
| Linux | linux Debian 13.5 (trixie) | 5.15.15-1 | [DEBIAN-CVE-2021-4135](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4135.md) | Jul 14, 2022 |
| Linux | linux Debian 14 | 5.15.15-1 | [DEBIAN-CVE-2021-4135](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4135.md) | Jul 14, 2022 |

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