Medium severity · published May 26, 2026
CVE-2026-42015
Gnutls: gnutls: memory corruption due to off-by-one error in pkcs#12 bag handling
5.3
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
Cert Manager support for Red Hat OpenShift release 1.17 · Red Hat
All versions, or not specified · source: vendor
CM
Cert Manager support for Red Hat OpenShift release 1.18 · Red Hat
All versions, or not specified · source: vendor
CM
Cert Manager support for Red Hat OpenShift release 1.20 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Discovery 2 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 6 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 7 Extended Lifecycle Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support · Red Hat
All versions, or not specified · source: vendor
Affected product
CM
Cert Manager support for Red Hat OpenShift release 1.17
Red Hat
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42015
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42015
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:13274
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:20611
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:20612
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:20613
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:26319
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:26409
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