CVE-2022-29242: GOST engine is a reference implementation of the Russian GOST crypto algorithms for OpenSSL

Q: How do I fix CVE-2022-29242?

gost engine: upgrade to 3.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2022-29242 being exploited?

CVE-2022-29242 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-2022-29242 affect?

CVE-2022-29242 affects gost engine. Severity is medium (CVSS 5.9). GOST engine is a reference implementation of the Russian GOST crypto algorithms for OpenSSL. TLS clients using GOST engine when ciphersuite `TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC` is agreed and the server uses 512 bit GOST secret key

Q: How urgent is CVE-2022-29242?

Priority 50/100. Remotely exploitable, no login, no user action; On your watchlist

This month

MEDIUM 5.9REMOTEWATCHLISTUPGRADE

CVE-2022-29242 is a medium-severity flaw (CVSS 5.9) affecting gost engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GOST engine is a reference implementation of the Russian GOST crypto algorithms for OpenSSL. TLS clients using GOST engine when ciphersuite `TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC` is agreed and the server uses 512 bit GOST secret keys are vulnerable to buffer overflow. GOST engine version 3.0.1 contains a patch for this issue. Disabling ciphersuite `TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC` is a possible workaround.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-05-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: gost engine project

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

Am I affected?

Timeline

2022-05-24 15:15 UTCPublished CVE record published
2026-06-17 04:39 UTCUpdated Record last modified

gost engine project gost engine UPGRADE

Affected: < 3.0.1

Fixed in: 3.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gost-engine || rpm -q gost-engine || gost-engine --version

2. UPGRADE to 3.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gost-engine

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gost-engine

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-2022-29242?

gost engine: upgrade to 3.0.1. Exact commands for each OS are on this page.

Is CVE-2022-29242 being exploited?

CVE-2022-29242 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-2022-29242 affect?

CVE-2022-29242 affects gost engine. Severity is medium (CVSS 5.9). GOST engine is a reference implementation of the Russian GOST crypto algorithms for OpenSSL. TLS clients using GOST engine when ciphersuite `TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC` is agreed and the server uses 512 bit GOST secret key

How urgent is CVE-2022-29242?

Priority 50/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

OpenSSL vulnerabilities

References

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