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CVE-2018-8099

23
FAUCET Score

CVE-2018-8099 is a double free vulnerability in libgit2 before v0.26.2, affecting products like Debian Linux and libgit2 itself. An attacker can trigger a denial of service by providing a specially crafted repository index file. Rated Medium (CVSS 6.5), it requires user interaction (UI:R) but has low attack complexity (AC:L) and can be exploited over the network (AV:N). There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.26.2CPE matchmatch criteria
cpe:2.3:a:libgit2:libgit2:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.39%
Probability of exploitation in next 30 days
EPSS Percentile
69.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0139 is in the 82nd percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-8099Low

libgit2: denial of service (DoS) via crafted repository index files

Mar 8, 2018

References

github.com / libgit2/libgit2/commit/58a6fe94cb851f71214dbefac3f9bffee437d6fe
PatchThird Party Advisory
libgit2.github.com / security
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2022/03/msg00031.html
Mailing ListThird Party Advisory