Linuxsecurity Critical phpseclib Vulnerabilities Expose Sensitive Data and Cause DoS
Article Content
- •Three critical vulnerabilities in phpseclib identified: CVE-2026-32935, CVE-2026-40194, CVE-2026-44167.
- •Affected systems include multiple Ubuntu LTS versions from 16.04 to 26.04.
- •Immediate system updates are recommended to address these vulnerabilities.
Multiple vulnerabilities were discovered in phpseclib, a library for arbitrary-precision integer arithmetic. Notably, CVE-2026-32935 involves a lack of constant-time padding validation in AES CBC mode, potentially allowing remote attackers to obtain sensitive information. CVE-2026-40194 highlights a similar issue with SSH packet authentication codes, also risking data exposure. Additionally, CVE-2026-44167 permits attackers to exploit improper object identifier length limitations, leading to denial of service conditions. These vulnerabilities affect various Ubuntu versions, including 16.04 to 26.04 LTS. Users are advised to update their systems to mitigate risks. The vulnerabilities were disclosed between March and May 2026, with patches available through standard system updates.
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