How severe is CVE-2022-29503?

CVE-2022-29503 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-29503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-29503?

CVE-2022-29503 primarily affects Uclibc. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-29503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-29503 published?

CVE-2022-29503 was published on 2022-09-29 and last updated on 2026-06-17.

CVE-2022-29503

CVE-2022-29503 is a critical-severity vulnerability in Uclibc with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Uclibc
Published: 2022-09-29
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2022-29503?: 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 severe is CVE-2022-29503?: CVE-2022-29503 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-29503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-29503?: CVE-2022-29503 primarily affects Uclibc. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-29503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-29503 published?: CVE-2022-29503 was published on 2022-09-29 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2022-1517

Affected products (3)

cpe:2.3:a:uclibc:uclibc:0.9.33.2:*:*:*:*:*:*:*
cpe:2.3:a:uclibc-ng_project:uclibc-ng:1.0.40:*:*:*:*:*:*:*
cpe:2.3:o:anker:eufy_homebase_2_firmware:2.1.8.8h:*:*:*:*:*:*:*

More vulnerabilities in Uclibc

CVE-2017-9728 — Critical (CVSS 9.8): In uClibc 0.9.33.2, there is an out-of-bounds read in the get_subexp function in misc/regex/regexec.c when processing a…
CVE-2021-43523 — Critical (CVSS 9.6): In uClibc and uClibc-ng before 1.0.39, incorrect handling of special characters in domain names returned by DNS servers…
CVE-2017-9729 — High (CVSS 7.5): In uClibc 0.9.33.2, there is stack exhaustion (uncontrolled recursion) in the check_dst_limits_calc_pos_1 function in…
CVE-2016-6264 — High (CVSS 7.5): Integer signedness error in libc/string/arm/memset.S in uClibc and uClibc-ng before 1.0.16 allows context-dependent…
CVE-2022-30295 — Medium (CVSS 6.5): uClibc-ng through 1.0.40 and uClibc through 0.9.33.2 use predictable DNS transaction IDs that may lead to DNS cache…

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