CVE-2015-0838 Dulwich Buffer Overflow when handling pack files

What is CVE-2015-0838?

CVE-2015-0838 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 31 Mar 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Buffer overflow in the C implementation of the apply_delta function in _pack.c in Dulwich before 0.9.9 allows remote attackers to execute arbitrary code via a crafted pack file.

Weakness: CWE-119

Which versions are affected by CVE-2015-0838?

3 open source packages ship an affected version, including dulwich. It affects 2 products.

Products include Debian Debian Linux, Dulwich Project Dulwich.

How do I fix CVE-2015-0838?

Upgrade dulwich to 0.9.9 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2015-0838 being exploited?

There is no known exploitation of CVE-2015-0838 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2015-0838, DLA-231-1, GHSA-vjjf-3rvg-gv3v, PYSEC-2015-35, openSUSE-SU-2024:10124-1.