CVE-2021-36983: replay-sorcery-kms in Replay Sorcery 0.6.0 allows a local attacker to gain root privileges via a symlink attac

Routine

HIGH 7.8DOWNGRADE

CVE-2021-36983 is a high-severity flaw (CVSS 7.8) affecting replaysorcery. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

replay-sorcery-kms in Replay Sorcery 0.6.0 allows a local attacker to gain root privileges via a symlink attack on /tmp/replay-sorcery or /tmp/replay-sorcery/device.sock.

Why this priority

High severity

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-59
Published	2021-07-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: replaysorcery project

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

Am I affected?

Timeline

2021-07-30 14:15 UTCPublished CVE record published
2026-06-17 03:59 UTCUpdated Record last modified

replaysorcery project replaysorcery DOWNGRADE

Affected: 0.6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.6.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.6.0 (Debian / Ubuntu)

apt-cache madison replaysorcery sudo apt install replaysorcery=<VERSION_BEFORE_0.6.0> sudo apt-mark hold replaysorcery

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

dnf --showduplicates list replaysorcery sudo dnf downgrade replaysorcery-<VERSION_BEFORE_0.6.0> sudo dnf versionlock add replaysorcery

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-2021-36983?

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

Is CVE-2021-36983 being exploited?

CVE-2021-36983 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-2021-36983 affect?

CVE-2021-36983 affects replaysorcery. Severity is high (CVSS 7.8). replay-sorcery-kms in Replay Sorcery 0.6.0 allows a local attacker to gain root privileges via a symlink attack on /tmp/replay-sorcery or /tmp/replay-sorcery/device.sock.

How urgent is CVE-2021-36983?

Priority 38/100. High severity

Related CVEs

CVE-2021-26936 HIGH 7.8 UPGRADE The replay-sorcery program in ReplaySorcery 0.4.0 through 0.5.0, when using the default setuid-root configurat

References

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