CVE-2026-5419— Gnutls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removal
Possible ATT&CK Techniques 1AI
T1530 · Data from Cloud StorageAffected Version Matrix 17
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Discovery 2 | 1782159791< * | unaffected |
1782166952< * | unaffected | ||
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.8.10-4.el10_2< * | unaffected |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:3.8.9-9.el10_0.19< * | unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | any | unknown |
| Red Hat | Red Hat Enterprise Linux 7 | any | unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | any | affected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.10-4.el9_8< * | unaffected |
0:3.8.10-4.el9_8< * | unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:3.8.3-4.el9_4.6< * | unaffected |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:3.8.3-6.el9_6.4< * | unaffected |
| Red Hat | Red Hat Hardened Images | any | affected |
| Red Hat | Red Hat OpenShift Container Platform 4 | any | affected |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525684< * | unaffected |
1781525671< * | unaffected | ||
1781525693< * | unaffected | ||
1781525739< * | unaffected |
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I. Basic Information for CVE-2026-5419
Vulnerability Information
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Vulnerability Title
Gnutls: 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)
Vulnerability Title
GnuTLS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GnuTLS是GnuTLS开源的一款免费的用于实现SSL、TLS和DTLS协议的安全通信库。 gnutls存在安全漏洞，该漏洞源于PKCS#7填充检查在解密过程中不是恒定时间，可能导致远程攻击者通过时序侧信道泄露填充字节的敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.8.10-4.el10_2 ~ * | cpe:/o:redhat:enterprise_linux:10.2 | |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:3.8.9-9.el10_0.19 ~ * | cpe:/o:redhat:enterprise_linux_eus:10.0 | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.10-4.el9_8 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.10-4.el9_8 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:3.8.3-4.el9_4.6 ~ * | cpe:/a:redhat:rhel_e4s:9.4::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:3.8.3-6.el9_6.4 ~ * | cpe:/a:redhat:rhel_eus:9.6::appstream | |
| Red Hat | Red Hat Discovery 2 | 1782159791 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Discovery 2 | 1782166952 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525684 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525671 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525693 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1781525739 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| Red Hat | Red Hat Enterprise Linux 8 | - | cpe:/o:redhat:enterprise_linux:8 | |
| Red Hat | Red Hat Hardened Images | - | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 |
II. Public POCs for CVE-2026-5419
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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Vendor Advisories for CVE-2026-5419 (6)
- 🔗 RHSA-2026:32962 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:20613 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
Other References for CVE-2026-5419 (3)
Same Patch Batch · Red Hat · 2026-06-01 · 5 CVEs total
| CVE-2026-43958 | 7.8 HIGH | Rrdtool: rrdtool: stack buffer overflow allows local code execution or denial of service |
| CVE-2026-10118 | 7.8 HIGH | Poppler: integer overflow in poppler splashoutputdev::tilingpatternfill leads to heap buff |
| CVE-2026-10517 | 5.8 MEDIUM | Clair: clair: unauthenticated ssrf via manifest layer uri enables internal network reconna |
| CVE-2026-10533 | 5.0 MEDIUM | Openshift: openshift: non-admin user can bypass resourcequota and flood etcd with events c |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 10
- CVE-2026-15028
Libarchive: heap overflow oob read while parsing a tar archi - CVE-2026-59692
Gstreamer: gstreamer: dtls certificate subject dn stack buff - CVE-2026-59691
Gstreamer: gstreamer: rfbsrc/librfb hextile heap out-of-boun - CVE-2026-14935
Gstreamer: gstreamer: webrtcbin accepts remote sdp without a - CVE-2026-14476
Sssd: sssd: gpo cache path traversal via unsanitized gpcfile
Same vendor: Red Hat
- CVE-2026-15143
Guardrails-detectors: guardrails-detectors: ssrf and local f - CVE-2026-15028
Libarchive: heap overflow oob read while parsing a tar archi - CVE-2026-15378
Guardrails-detectors: guardrails-detectors: ssrf and local f - CVE-2026-59692
Gstreamer: gstreamer: dtls certificate subject dn stack buff - CVE-2026-59691
Gstreamer: gstreamer: rfbsrc/librfb hextile heap out-of-boun
Same weakness: CWE-208
- CVE-2026-54736
Phalcon: Non-constant-time HMAC verification in `Encryption\ - CVE-2026-59218
Open WebUI: Account enumeration via observable login timing - CVE-2026-15041
389-ds-base: 389-ds-base: non-constant-time comparison in pb - CVE-2026-41516
OP-TEE: Hisilicon HPRE PKCS#1 v1.5 Decryption Padding Oracle - CVE-2026-41515
OP-TEE: RSA-OAEP padding oracle in NXP CAAM driver enables p
V. Comments for CVE-2026-5419
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