# CVE-2021-1048: linux: In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free

CVE-2021-1048 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-1048, released December 15, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on May 23, 2022. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/cve/CVE-2021-1048
- Priority: Patch now
- CVSS: 7.8 (high)
- EPSS: 0.0106
- CISA KEV: listed May 23, 2022, federal due date Jun 13, 2022
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 15, 2021

## Description

In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-204573007References: Upstream kernel

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.8.10-1 | [DEBIAN-CVE-2021-1048](https://patchblox.com/security/data/fix/linux/debian-cve-2021-1048.md) | Dec 15, 2021 |
| Linux | linux Debian 13.5 (trixie) | 5.8.10-1 | [DEBIAN-CVE-2021-1048](https://patchblox.com/security/data/fix/linux/debian-cve-2021-1048.md) | Dec 15, 2021 |
| Linux | linux Debian 14 | 5.8.10-1 | [DEBIAN-CVE-2021-1048](https://patchblox.com/security/data/fix/linux/debian-cve-2021-1048.md) | Dec 15, 2021 |

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