CVE-2024-25679: In PQUIC before 5bde5bb, retention of unused initial encryption keys allows attackers to disrupt a connection

Q: How do I fix CVE-2024-25679?

pquic: upgrade to 2023-10-30. Exact commands for each OS are on this page.

Q: Is CVE-2024-25679 being exploited?

CVE-2024-25679 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-25679 affect?

CVE-2024-25679 affects pquic. Severity is medium (CVSS 6.5). In PQUIC before 5bde5bb, retention of unused initial encryption keys allows attackers to disrupt a connection with a PSK configuration by sending a CONNECTION_CLOSE frame that is encrypted via the initial key computed. Network traffic sniff

Q: How urgent is CVE-2024-25679?

Priority 32/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 6.5REMOTEUPGRADE

CVE-2024-25679 is a medium-severity flaw (CVSS 6.5) affecting pquic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In PQUIC before 5bde5bb, retention of unused initial encryption keys allows attackers to disrupt a connection with a PSK configuration by sending a CONNECTION_CLOSE frame that is encrypted via the initial key computed. Network traffic sniffing is needed as part of exploitation.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-324
Published	2024-02-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pquic

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

Am I affected?

Timeline

2024-02-09 10:15 UTCPublished CVE record published
2026-06-17 07:16 UTCUpdated Record last modified

pquic pquic UPGRADE

Affected: < 2023-10-30

Fixed in: 2023-10-30

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2023-10-30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pquic

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pquic

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2024-25679?

pquic: upgrade to 2023-10-30. Exact commands for each OS are on this page.

Is CVE-2024-25679 being exploited?

CVE-2024-25679 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-2024-25679 affect?

CVE-2024-25679 affects pquic. Severity is medium (CVSS 6.5). In PQUIC before 5bde5bb, retention of unused initial encryption keys allows attackers to disrupt a connection with a PSK configuration by sending a CONNECTION_CLOSE frame that is encrypted via the initial key computed. Network traffic sniff

How urgent is CVE-2024-25679?

Priority 32/100. Remotely exploitable, no login, no user action

References

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