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CVE-2020-14315

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff...

9.8 CriticalFix available

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.60%Up 1.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Record
CVE-2020-14315
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-787
Updated
2026-11-02
CVE List No score

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Record
CVE-2020-14315
Weakness
CWE-787
Updated
2026-11-02
EUVDEUVD-2020-6467 No score

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Record
EUVD-2020-6467
Updated
2026-11-03
GitHub AdvisoriesGHSA-g2hg-j8m2-ppxr No score

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff...

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Record
GHSA-g2hg-j8m2-ppxr
Weakness
CWE-787
Updated
2026-11-02
OSV 9.8

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Record
CVE-2020-14315
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-14315 9.8

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Record
DEBIAN-CVE-2020-14315
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-14315 9.8

A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.

Record
UBUNTU-CVE-2020-14315
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
bsdiff
Debian:12
before 4.3-22
4.3-22
bsdiff
Debian:13
before 4.3-22
4.3-22
bsdiff
Debian:14
before 4.3-22
4.3-22
bsdiff
Ubuntu:16.04:LTS
All versions, plus listed versions
4.3-154.3-15+deb8u1build0.16.04.1
None known
bsdiff
Ubuntu:18.04:LTS
All versions, plus listed versions
4.3-194.3-20
None known
bsdiff
Ubuntu:20.04:LTS
All versions, plus listed versions
4.3-21
None known
bsdiff
Ubuntu:22.04:LTS
All versions, plus listed versions
4.3-224.3-23
None known
bsdiff
Ubuntu:24.04:LTS
All versions, plus listed versions
4.3-23
None known
bsdiff
Ubuntu:25.10
All versions, plus listed versions
4.3-23
None known
bsdiff
Ubuntu:26.10
All versions, plus listed versions
4.3-23build1
None known
bsdiff
Ubuntu:26.04:LTS
All versions, plus listed versions
4.3-234.3-23build1
None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-14315 is a critical vulnerability (CVSS 9.8) in Daemonology Bsdiff, published September 16, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.60%, the 85th percentile. Fixed in bsdiff 4.3-22.

References

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