# CVE-2018-8099: libgit2-26: Incorrect returning of an error code in the index.c:read_entry() function leads to a double free in libgit2 before v0...

CVE-2018-8099 is fixed in libgit2-26 on 1 platform by libgit2-26 0.26.0+dfsg.1-1.1ubuntu0.2+esm2 (version 0.26.0+dfsg.1-1.1ubuntu0.2+esm2), released August 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-8099
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0139
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 13, 2018

## Description

Incorrect returning of an error code in the index.c:read_entry() function leads to a double free in libgit2 before v0.26.2, which allows an attacker to cause a denial of service via a crafted repository index file.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libgit2-26 Ubuntu 18.04.6 LTS (bionic) | 0.26.0+dfsg.1-1.1ubuntu0.2+esm2 | [libgit2-26 0.26.0+dfsg.1-1.1ubuntu0.2+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgit2-26-0.26.0-dfsg.1-1.1ubuntu0.2-esm2.md) | Aug 14, 2026 |

---

Data as of 2026-11-12T19:57:06Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.