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Vulnerability record · CVE-2018-8098 · published 14 March 2018

CVE-2018-8098: Libgit2 integer overflow vulnerability

Libgit2 · Libgit2

Integer overflow in the index.c:read_entry() function while decompressing a compressed prefix length in libgit2 before v0.26.2 allows an attacker to cause a denial of service (out-of-bounds read) via a crafted repository index file.

6.5 CVSS 3.1 Medium EPSS 1.4% · top 28.4% CWE-190 · Integer overflow
6.5CVSS 3.1 base score, v2 4.3
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

Integer overflow in the index.c:read_entry() function while decompressing a compressed prefix length in libgit2 before v0.26.2 allows an attacker to cause a denial of service (out-of-bounds read) via a crafted repository index file.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/libgit2/libgit2/commit/3207ddb0103543da8ad2139ec6539f590f9900c1 PatchThird Party Advisory
https://github.com/libgit2/libgit2/commit/3db1af1f370295ad5355b8f64b865a2a357bcac0 PatchThird Party Advisory
https://libgit2.github.com/security/ PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html Mailing ListThird Party Advisory
https://github.com/libgit2/libgit2/commit/3207ddb0103543da8ad2139ec6539f590f9900c1 PatchThird Party Advisory
https://github.com/libgit2/libgit2/commit/3db1af1f370295ad5355b8f64b865a2a357bcac0 PatchThird Party Advisory
https://libgit2.github.com/security/ PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html Mailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-8098), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.