CVE-2022-36647: PKUVCL davs2 v1.6.205 was discovered to contain a global buffer overflow via the function parse_sequence_heade

Routine

MEDIUM 5.5DOWNGRADE

CVE-2022-36647 is a medium-severity flaw (CVSS 5.5) affecting davs2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PKUVCL davs2 v1.6.205 was discovered to contain a global buffer overflow via the function parse_sequence_header() at source/common/header.cc:269.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-09-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: davs2 project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-09-02 22:15 UTCPublished CVE record published
2026-06-17 04:53 UTCUpdated Record last modified

davs2 project davs2 DOWNGRADE

Affected: 1.6.205

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.205

1. Check installed version

apt-cache policy davs2 || rpm -q davs2 || davs2 --version

2. No fixed release: DOWNGRADE to a release before 1.6.205 (Debian / Ubuntu)

apt-cache madison davs2 sudo apt install davs2=<VERSION_BEFORE_1.6.205> sudo apt-mark hold davs2

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list davs2 sudo dnf downgrade davs2-<VERSION_BEFORE_1.6.205> sudo dnf versionlock add davs2

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-36647?

davs2: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-36647 being exploited?

CVE-2022-36647 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-36647 affect?

CVE-2022-36647 affects davs2. Severity is medium (CVSS 5.5). PKUVCL davs2 v1.6.205 was discovered to contain a global buffer overflow via the function parse_sequence_header() at source/common/header.cc:269.

How urgent is CVE-2022-36647?

Priority 29/100. Public exploit reference

References

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