CVE-2022-23521Network attack vector

Code execution via gitattributes integer overflows

Published Jan 17, 2023 · Updated Feb 13, 2025

Integer overflow in Git allows remote attackers to execute arbitrary code via crafted .gitattributes data in repository history. The attr.c parser performs bounded integer and allocation calculations that wrap on extreme pattern counts, attribute counts, or name lengths, causing out-of-bounds heap reads and writes. The data must be processed from a working tree, index, or both; file parsing splits lines above 2 KB while index parsing does not, so placement changes the failure mode.

CVSS severity9.8
Critical
EPSS probability56.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Git allows remote attackers to execute arbitrary code via crafted .gitattributes data in repository history. The attr.c parser performs bounded integer and allocation calculations that wrap on extreme pattern counts, attribute counts, or name lengths, causing out-of-bounds heap reads and writes. The data must be processed from a working tree, index, or both; file parsing splits lines above 2 KB while index parsing does not, so placement changes the failure mode.

The record

CVE
CVE-2022-23521
Published
Jan 17, 2023
Updated
Feb 13, 2025
Vendor
Git
Product
Git
Classifications
CWE-122, CWE-190, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.30.7
  2. Affected versionversion=>= 2.31.0, < 2.31.6
  3. Affected versionversion=>= 2.32.0, < 2.32.5
  4. Affected versionversion=>= 2.33.0, < 2.33.6
  5. Affected versionversion=>= 2.34.0, < 2.34.6
  6. Affected versionversion=>= 2.35.0, < 2.35.6
  7. Affected versionversion=>= 2.36.0, < 2.36.4
  8. Affected versionversion=>= 2.37.0, < 2.37.5
  9. Affected versionversion=>= 2.38.0, < 2.38.3
  10. Affected versionversion== 2.39.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Git · Gitversion=< 2.30.7; version=>= 2.31.0, < 2.31.6; version=>= 2.32.0, < 2.32.5; version=>= 2.33.0, < 2.33.6; version=>= 2.34.0, < 2.34.6; version=>= 2.35.0, < 2.35.6; version=>= 2.36.0, < 2.36.4; version=>= 2.37.0, < 2.37.5; version=>= 2.38.0, < 2.38.3; version== 2.39.0

Published CVSS scores

9.8GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-190Integer Overflow or Wraparound
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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