CVE-2022-29503: A memory corruption vulnerability exists in the libpthread linuxthreads functionality of uClibC 0.9.33.2 and u

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CRITICAL 9.8REMOTEWATCHLISTDOWNGRADEDOWNGRADEMITIGATE

CVE-2022-29503 is a critical-severity flaw (CVSS 9.8) affecting uclibc, uclibc-ng, eufy homebase 2 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A memory corruption vulnerability exists in the libpthread linuxthreads functionality of uClibC 0.9.33.2 and uClibC-ng 1.0.40. Thread allocation can lead to memory corruption. An attacker can create threads to trigger this vulnerability.

Why this priority

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

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	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-119, CWE-770
Published	2022-09-29
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: anker · uclibc · uclibc-ng project

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

Am I affected?

Timeline

2022-09-29 17:15 UTCPublished CVE record published
2026-06-17 04:40 UTCUpdated Record last modified

uclibc uclibc DOWNGRADE

Affected: 0.9.33.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.33.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9.33.2 (Debian / Ubuntu)

apt-cache madison uclibc sudo apt install uclibc=<VERSION_BEFORE_0.9.33.2> sudo apt-mark hold uclibc

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

dnf --showduplicates list uclibc sudo dnf downgrade uclibc-<VERSION_BEFORE_0.9.33.2> sudo dnf versionlock add uclibc

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.

uclibc-ng project uclibc-ng DOWNGRADE

Affected: 1.0.40

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.40

1. Check installed version

apt-cache policy uclibc-ng || rpm -q uclibc-ng || uclibc-ng --version

2. No fixed release: DOWNGRADE to a release before 1.0.40 (Debian / Ubuntu)

apt-cache madison uclibc-ng sudo apt install uclibc-ng=<VERSION_BEFORE_1.0.40> sudo apt-mark hold uclibc-ng

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

dnf --showduplicates list uclibc-ng sudo dnf downgrade uclibc-ng-<VERSION_BEFORE_1.0.40> sudo dnf versionlock add uclibc-ng

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.

anker eufy homebase 2 firmware MITIGATE

Affected: 2.1.8.8h

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.8.8h

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-29503?

uclibc: downgrade or apply the listed mitigation; uclibc-ng: downgrade or apply the listed mitigation; eufy homebase 2 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-29503 being exploited?

CVE-2022-29503 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-2022-29503 affect?

CVE-2022-29503 affects uclibc, uclibc-ng, eufy homebase 2 firmware. Severity is critical (CVSS 9.8). A memory corruption vulnerability exists in the libpthread linuxthreads functionality of uClibC 0.9.33.2 and uClibC-ng 1.0.40. Thread allocation can lead to memory corruption. An attacker can create threads to trigger this vulnerability.

How urgent is CVE-2022-29503?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2021-43523 CRITICAL 9.6 UPGRADE UPGRADE In uClibc and uClibc-ng before 1.0.39, incorrect handling of special characters in domain names returned by DN

References

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