CVE-2022-45474: drachtio-server 0.8.18 has a request-handler.cpp event_cb use-after-free for any request.

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-45474 is a critical-severity flaw (CVSS 9.8) affecting drachtio-server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

drachtio-server 0.8.18 has a request-handler.cpp event_cb use-after-free for any request.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-416
Published	2022-11-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: drachtio

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

Am I affected?

Timeline

2022-11-18 18:15 UTCPublished CVE record published
2026-06-17 05:10 UTCUpdated Record last modified

drachtio drachtio-server DOWNGRADE

Affected: 0.8.18

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.18

1. Check installed version

apt-cache policy drachtio-server || rpm -q drachtio-server || drachtio-server --version

2. No fixed release: DOWNGRADE to a release before 0.8.18 (Debian / Ubuntu)

apt-cache madison drachtio-server sudo apt install drachtio-server=<VERSION_BEFORE_0.8.18> sudo apt-mark hold drachtio-server

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

dnf --showduplicates list drachtio-server sudo dnf downgrade drachtio-server-<VERSION_BEFORE_0.8.18> sudo dnf versionlock add drachtio-server

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-2022-45474?

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

Is CVE-2022-45474 being exploited?

CVE-2022-45474 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-2022-45474 affect?

CVE-2022-45474 affects drachtio-server. Severity is critical (CVSS 9.8). drachtio-server 0.8.18 has a request-handler.cpp event_cb use-after-free for any request.

How urgent is CVE-2022-45474?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-47517 HIGH 7.5 UPGRADE An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.19
CVE-2022-47516 HIGH 7.5 UPGRADE An issue was discovered in the libsofia-sip fork in drachtio-server before 0.8.20
CVE-2022-47515 HIGH 7.5 UPGRADE An issue was discovered in drachtio-server before 0.8.20
CVE-2022-45909 CRITICAL 9.1 UPGRADE drachtio-server before 0.8.19 has a heap-based buffer over-read via a long Request-URI in an INVITE request.
CVE-2022-45473 MEDIUM 5.5 DOWNGRADE In drachtio-server 0.8.18, /var/log/drachtio has mode 0777 and drachtio.log has mode 0666.

References

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