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

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Summary

CVECVE-2026-42015
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-26 22:16:42 UTC
Updated2026-07-09 07:16:23 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.007270000 probability, percentile 0.498350000 (date 2026-07-12)

Problem Types: CWE-193 | CWE-193 Off-by-one Error

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 unaffected 0:3.8.10-4.el10_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support unaffected 0:3.8.9-9.el10_0.19 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:3.6.16-8.el8_10.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:3.6.16-8.el8_10.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:3.6.14-10.el8_4.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support unaffected 0:4.13-3.el8_4.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On unaffected 0:3.6.14-10.el8_4.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On unaffected 0:4.13-3.el8_4.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:3.6.16-5.el8_6.5 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support unaffected 0:4.13-3.el8_6.2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On unaffected 0:3.6.16-5.el8_6.5 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On unaffected 0:4.13-3.el8_6.2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:3.6.16-7.el8_8.4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service unaffected 0:4.13-4.el8_8.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:3.6.16-7.el8_8.4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions unaffected 0:4.13-4.el8_8.1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:3.8.10-4.el9_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:3.8.10-4.el9_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.4 Update Services For SAP Solutions unaffected 0:3.8.3-4.el9_4.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support unaffected 0:3.8.3-6.el9_6.4 * rpm Not specified
CNA Red Hat Red Hat Discovery 2 unaffected 1782159791 * rpm Not specified
CNA Red Hat Red Hat Discovery 2 unaffected 1782166952 * rpm Not specified
CNA Red Hat Red Hat Update Infrastructure 5 unaffected 1781525684 * rpm Not specified
CNA Red Hat Red Hat Update Infrastructure 5 unaffected 1781525671 * rpm Not specified
CNA Red Hat Red Hat Update Infrastructure 5 unaffected 1781525693 * rpm Not specified
CNA Red Hat Red Hat Update Infrastructure 5 unaffected 1781525739 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Hardened Images Not specified Not specified
CNA Red Hat Red Hat OpenShift Container Platform 4 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:29197 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:30004 [email protected] access.redhat.com
www.gnutls.org/security-new.html [email protected] www.gnutls.org
access.redhat.com/errata/RHSA-2026:33125 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:26319 [email protected] access.redhat.com
access.redhat.com/security/cve/CVE-2026-42015 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:32962 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:26409 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:30850 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:20612 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:20613 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:30849 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:20611 [email protected] access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Zou Dikai for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-07T10:50:28.379ZReported to Red Hat.
CNA2026-04-29T00:00:00.000ZMade public.
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