Security readout for executives and security teams
Plain-English summary
CVE-2018-8098 is a libgit2 parsing flaw that can crash software when it reads a specially crafted repository index file. The known impact is denial of service, not data theft or remote code execution. Risk is highest where services automatically ingest repositories from users or third parties.
Executive priority
Treat this as a targeted availability risk. Prioritize patching internet-facing or multi-tenant systems that process untrusted repositories; routine patching is reasonable for internal developer-only use.
Technical view
libgit2 before 0.26.2 has an integer overflow in index.c read_entry() while decompressing a compressed prefix length. The flaw can lead to an out-of-bounds read and denial of service through a crafted repository index file.
Likely exposure
Exposure is likely in applications, CI systems, repository scanners, or developer tools that embed libgit2 versions before 0.26.2 and parse untrusted or externally supplied Git repositories.
Exploitation context
The source bundle does not show CISA KEV listing or public evidence of active exploitation. Exploitation requires getting a vulnerable libgit2 consumer to read a crafted repository index file.
Researcher notes
Evidence is limited to the CVE description, libgit2 references, commits, and Debian advisory. No CVSS, CWE, or detailed affected CPE data is provided in the bundle, so version confirmation should focus on libgit2 release and downstream package metadata.
Mitigation direction
- Upgrade libgit2 to 0.26.2 or later where directly embedded.
- Apply vendor or distribution security updates for packaged libgit2.
- Inventory applications that bundle libgit2 rather than using system packages.
- Restrict automatic processing of untrusted repositories until patched.
Validation and detection
- Check dependency manifests, SBOMs, and package inventories for libgit2 before 0.26.2.
- Confirm repository-processing services do not load vulnerable bundled libgit2 builds.
- Review CI, scanning, and developer tooling that accepts third-party repositories.
- Verify applicable Debian systems include the referenced libgit2 security update.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-8098 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/libgit2/libgit2/commit/3207ddb0103543da8ad2139ec6539f590f9900c1CVE reference · x_refsource_CONFIRM
- https://libgit2.github.com/security/CVE reference · x_refsource_CONFIRM
- https://github.com/libgit2/libgit2/commit/3db1af1f370295ad5355b8f64b865a2a357bcac0CVE reference · x_refsource_CONFIRM
- [debian-lts-announce] 20220321 [SECURITY] [DLA 2936-1] libgit2 security updateCVE reference · mailing-list, x_refsource_MLIST
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.