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CVE-2026-5419— Guntls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removal

CVSS 3.7 · Low EPSS 0.04% · P11

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage

Affected Version Matrix 8

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 100:3.8.10-4.el10_2< *unaffected
Red HatRed Hat Enterprise Linux 6anyunknown
Red HatRed Hat Enterprise Linux 7anyaffected
Red HatRed Hat Enterprise Linux 8anyaffected
Red HatRed Hat Enterprise Linux 90:3.8.10-4.el9_8< *unaffected
0:3.8.10-4.el9_8< *unaffected
Red HatRed Hat Hardened Imagesanyaffected
Red HatRed Hat OpenShift Container Platform 4anyaffected
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I. Basic Information for CVE-2026-5419

Vulnerability Information
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Vulnerability Title
Guntls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removal
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in gnutls. The PKCS#7 padding check, performed during decryption, was not constant-time. This timing side-channel could allow a remote attacker to potentially leak sensitive information about the padding bytes through observable timing differences. This vulnerability is a form of information disclosure.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过时间差异性导致的信息暴露
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Enterprise Linux 10 0:3.8.10-4.el10_2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red HatRed Hat Enterprise Linux 9 0:3.8.10-4.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red HatRed Hat Enterprise Linux 9 0:3.8.10-4.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 7-cpe:/o:redhat:enterprise_linux:7
Red HatRed Hat Enterprise Linux 8-cpe:/o:redhat:enterprise_linux:8
Red HatRed Hat Hardened Images-cpe:/a:redhat:hummingbird:1
Red HatRed Hat OpenShift Container Platform 4-cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-5419

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III. Intelligence Information for CVE-2026-5419

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Other References for CVE-2026-5419 (3)

Same Patch Batch · Red Hat · 2026-06-01 · 5 CVEs total

CVE-2026-439587.8 HIGHRrdtool: rrdtool: stack buffer overflow allows local code execution or denial of service
CVE-2026-101187.8 HIGHPoppler: integer overflow in poppler splashoutputdev::tilingpatternfill leads to heap buff
CVE-2026-105175.8 MEDIUMClair: clair: unauthenticated ssrf via manifest layer uri enables internal network reconna
CVE-2026-105335.0 MEDIUMOpenshift: openshift: non-admin user can bypass resourcequota and flood etcd with events c

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-208

V. Comments for CVE-2026-5419

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