CVE-2022-35913: Samourai Wallet Stonewallx2 0.99.98e allows a denial of service via a P2P coinjoin

Routine

MEDIUM 4.3DOWNGRADE

CVE-2022-35913 is a medium-severity flaw (CVSS 4.3) affecting samourai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Samourai Wallet Stonewallx2 0.99.98e allows a denial of service via a P2P coinjoin. The attacker and victim must follow each other's paynym. Then, the victim must try to collaborate with the attacker for a Stonewallx2 transaction. Next, the attacker broadcasts a tx, spending the inputs used in Stonewallx2 before the victim can broadcast the collaborative transaction. The attacker does not signal opt in RBF, and uses the lowest fee rate. This woul

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 45%)
CISA exploited list	No
Weakness	CWE-400
Published	2022-09-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kayako

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

Am I affected?

Timeline

2022-09-06 23:15 UTCPublished CVE record published
2026-06-17 04:52 UTCUpdated Record last modified

kayako samourai DOWNGRADE

Affected: 0.99.98e

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.99.98e

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.99.98e (Debian / Ubuntu)

apt-cache madison samourai sudo apt install samourai=<VERSION_BEFORE_0.99.98e> sudo apt-mark hold samourai

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

dnf --showduplicates list samourai sudo dnf downgrade samourai-<VERSION_BEFORE_0.99.98e> sudo dnf versionlock add samourai

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-2022-35913?

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

Is CVE-2022-35913 being exploited?

CVE-2022-35913 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-2022-35913 affect?

CVE-2022-35913 affects samourai. Severity is medium (CVSS 4.3). Samourai Wallet Stonewallx2 0.99.98e allows a denial of service via a P2P coinjoin. The attacker and victim must follow each other's paynym. Then, the victim must try to collaborate with the attacker for a Stonewallx2 transaction. Next, the

How urgent is CVE-2022-35913?

Priority 29/100. No elevated risk signals yet.

References

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