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CVE-2026-42015— Gnutls: gnutls: memory corruption due to off-by-one error in pkcs#12 bag handling

CVSS 5.3 · Medium EPSS 0.14% · P34

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 8

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 10anyaffected
Red HatRed Hat Enterprise Linux 6anyunknown
Red HatRed Hat Enterprise Linux 7anyaffected
Red HatRed Hat Enterprise Linux 80:3.6.16-8.el8_10.6< *unaffected
0:3.6.16-8.el8_10.6< *unaffected
Red HatRed Hat Enterprise Linux 9anyaffected
Red HatRed Hat Hardened Imagesanyaffected
Red HatRed Hat OpenShift Container Platform 4anyaffected
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I. Basic Information for CVE-2026-42015

Vulnerability Information
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Vulnerability Title
Gnutls: gnutls: memory corruption due to off-by-one error in pkcs#12 bag handling
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in gnutls. An off-by-one error exists in the PKCS#12 bag element bounds check. This vulnerability allows an remote attacker to write past the internal array of a PKCS#12 bag when appending to a bag that already contains 32 elements. This memory corruption could lead to a denial of service (DoS) or potentially other unspecified impacts.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
Off-by-one错误
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#12包元素边界检查中存在差一错误，可能导致远程攻击者写入数组越界，造成内存损坏。
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

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Enterprise Linux 8 0:3.6.16-8.el8_10.6 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red HatRed Hat Enterprise Linux 8 0:3.6.16-8.el8_10.6 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10
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 9-cpe:/o:redhat:enterprise_linux:9
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-2026-42015

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III. Intelligence Information for CVE-2026-42015

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Vendor Advisories for CVE-2026-42015 (2)

Other References for CVE-2026-42015 (1)

Same Patch Batch · Red Hat · 2026-05-26 · 7 CVEs total

CVE-2026-73749.9 CRITICALKubevirt: kubevirt virt-handler: privilege escalation and node compromise via symlink foll
CVE-2026-44808.5 HIGHSamba: samba: remote code execution in printing subsystem via unescaped job description
CVE-2026-420138.2 HIGHGnutls: gnutls: certificate validation bypass due to oversized subject alternative name
CVE-2026-52608.2 HIGHGnutls: gnutls: information disclosure via heap overread in rsa key exchange
CVE-2026-488647.8 HIGHLibsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of mali
CVE-2026-420127.1 HIGHGnutls: gnutls: certificate validation bypass due to improper handling of uri and srv sans

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 8
Same vendor: Red Hat
Same weakness: CWE-193

V. Comments for CVE-2026-42015

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