CVE-2018-10887

Name: CVE-2018-10887
Creator: NVD / NIST
Published: 2018-07-10T14:29:00.26+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 2.05%

Last modified Jun 17, 2026

CVE-2018-10887 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. A flaw was found in libgit2 before version 0.27.3. It has been discovered that an unexpected sign extension in git_delta_apply function in delta.c file may lead to an integer overflow which in turn leads to an out of bound read, allowing to read before the base object. EPSS estimates a 2.05% chance of exploitation in the next 30 days.

Description

A flaw was found in libgit2 before version 0.27.3. It has been discovered that an unexpected sign extension in git_delta_apply function in delta.c file may lead to an integer overflow which in turn leads to an out of bound read, allowing to read before the base object. An attacker may use this flaw to leak memory addresses or cause a Denial of Service.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

2.05%

78.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libgit2	Libgit2	< 0.27.3
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1598021Issue Tracking, Patch
https://github.com/libgit2/libgit2/commit/3f461902dc1072acb8b7607ee65d0a0458ffac2aPatch
https://github.com/libgit2/libgit2/commit/c1577110467b701dcbcf9439ac225ea851b47d22Patch
https://github.com/libgit2/libgit2/releases/tag/v0.27.3Patch, Release Notes
https://lists.debian.org/debian-lts-announce/2018/08/msg00024.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00031.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1598021Issue Tracking, Patch
https://github.com/libgit2/libgit2/commit/3f461902dc1072acb8b7607ee65d0a0458ffac2aPatch
https://github.com/libgit2/libgit2/commit/c1577110467b701dcbcf9439ac225ea851b47d22Patch
https://github.com/libgit2/libgit2/releases/tag/v0.27.3Patch, Release Notes
https://lists.debian.org/debian-lts-announce/2018/08/msg00024.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00031.htmlMailing List, Third Party Advisory

Timeline

Published: Jul 10, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-10887?

How severe is CVE-2018-10887?

CVE-2018-10887 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 2.05% probability of exploitation in the next 30 days.

How do I fix CVE-2018-10887?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-10887?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST