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Vulnerability Details :

CVE-2026-53910

Summary
Assigner-CERT-PL
Assigner Org ID-4bb8329e-dd38-46c1-aafb-9bf32bcb93c6
Published At-22 Jul, 2026 | 13:42
Updated At-22 Jul, 2026 | 13:42
Rejected At-
Credits

Heap-based Buffer Overflow in GNU diffutils

diff3 tool from GNU diffutils is vulnerable to a heap‑based buffer overflow due to multiple signed integer overflows in line‑mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds. When processing crafted diff output, these overflows may cause the application to allocate insufficient memory and subsequently perform out‑of‑bounds writes during internal processing.  An attacker who can control the output of the diff program used by diff3 (e.g. via --diff-program pointing to a malicious script) can trigger out-of-bounds writes, resulting in a crash and potentially remote code execution depending on the environment. This issue has been fixed in commit 9ff04d5b84743e331e80b589335a52c5480d1815

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:CERT-PL
Assigner Org ID:4bb8329e-dd38-46c1-aafb-9bf32bcb93c6
Published At:22 Jul, 2026 | 13:42
Updated At:22 Jul, 2026 | 13:42
Rejected At:
▼CVE Numbering Authority (CNA)
Heap-based Buffer Overflow in GNU diffutils

diff3 tool from GNU diffutils is vulnerable to a heap‑based buffer overflow due to multiple signed integer overflows in line‑mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds. When processing crafted diff output, these overflows may cause the application to allocate insufficient memory and subsequently perform out‑of‑bounds writes during internal processing.  An attacker who can control the output of the diff program used by diff3 (e.g. via --diff-program pointing to a malicious script) can trigger out-of-bounds writes, resulting in a crash and potentially remote code execution depending on the environment. This issue has been fixed in commit 9ff04d5b84743e331e80b589335a52c5480d1815

Affected Products
Vendor
GNUGNU
Product
diffutils
Repo
https://git.savannah.gnu.org/cgit/diffutils.git/
Modules
  • diff3
Default Status
unaffected
Versions
Affected
  • From 0 through 3.12 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-190CWE-190 Integer Overflow or Wraparound
Type: CWE
CWE ID: CWE-190
Description: CWE-190 Integer Overflow or Wraparound
Metrics
VersionBase scoreBase severityVector
4.02.1LOW
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L
Version: 4.0
Base score: 2.1
Base severity: LOW
Vector:
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Michał Majchrowicz (AFINE Team)
finder
Marcin Wyczechowski (AFINE Team)
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://cert.pl/en/posts/2026/07/CVE-2026-53910
third-party-advisory
https://git.savannah.gnu.org/cgit/diffutils.git/
product
https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=73ed7ce85cc78effb94daf028c9af6b4e5252e50
patch
https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=9ff04d5b84743e331e80b589335a52c5480d1815
patch
Hyperlink: https://cert.pl/en/posts/2026/07/CVE-2026-53910
Resource:
third-party-advisory
Hyperlink: https://git.savannah.gnu.org/cgit/diffutils.git/
Resource:
product
Hyperlink: https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=73ed7ce85cc78effb94daf028c9af6b4e5252e50
Resource:
patch
Hyperlink: https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=9ff04d5b84743e331e80b589335a52c5480d1815
Resource:
patch
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cvd@cert.pl
Published At:22 Jul, 2026 | 14:17
Updated At:22 Jul, 2026 | 20:17

diff3 tool from GNU diffutils is vulnerable to a heap‑based buffer overflow due to multiple signed integer overflows in line‑mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds. When processing crafted diff output, these overflows may cause the application to allocate insufficient memory and subsequently perform out‑of‑bounds writes during internal processing.  An attacker who can control the output of the diff program used by diff3 (e.g. via --diff-program pointing to a malicious script) can trigger out-of-bounds writes, resulting in a crash and potentially remote code execution depending on the environment. This issue has been fixed in commit 9ff04d5b84743e331e80b589335a52c5480d1815

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.02.1LOW
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
N/A
Type: Secondary
Version: 4.0
Base score: 2.1
Base severity: LOW
Vector:
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-190Secondarycvd@cert.pl
CWE ID: CWE-190
Type: Secondary
Source: cvd@cert.pl
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://cert.pl/en/posts/2026/07/CVE-2026-53910cvd@cert.pl
N/A
https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=73ed7ce85cc78effb94daf028c9af6b4e5252e50cvd@cert.pl
N/A
https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=9ff04d5b84743e331e80b589335a52c5480d1815cvd@cert.pl
N/A
https://git.savannah.gnu.org/cgit/diffutils.git/cvd@cert.pl
N/A
Hyperlink: https://cert.pl/en/posts/2026/07/CVE-2026-53910
Source: cvd@cert.pl
Resource: N/A
Hyperlink: https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=73ed7ce85cc78effb94daf028c9af6b4e5252e50
Source: cvd@cert.pl
Resource: N/A
Hyperlink: https://cgit.git.savannah.gnu.org/cgit/diffutils.git/commit/?id=9ff04d5b84743e331e80b589335a52c5480d1815
Source: cvd@cert.pl
Resource: N/A
Hyperlink: https://git.savannah.gnu.org/cgit/diffutils.git/
Source: cvd@cert.pl
Resource: N/A

Change History

0
Information is not available yet

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