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CVE-2026-42015VulnerabilityPublished Updated

CVE-2026-42015: Red Hat Enterprise Linux 10 · Off-by-one Error

Affects Red Hat Enterprise Linux 10Source CVE Database V5

0

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Affected software

ProductAffectedFixed in
Red HatRed Hat Enterprise Linux 10Affected–Fixed in–
Red HatRed Hat Enterprise Linux 10.0 Extended Update SupportAffected–Fixed in–
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle SupportAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8Affected–Fixed in–
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update ServiceAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update ServiceAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP SolutionsAffected–Fixed in–
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP SolutionsAffected–Fixed in–
Red HatRed Hat Enterprise Linux 9Affected–Fixed in–
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP SolutionsAffected–Fixed in–
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP SolutionsAffected–Fixed in–
Red HatRed Hat Enterprise Linux 9.6 Extended Update SupportAffected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.17Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.17Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.17Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.17Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.18Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.18Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.18Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.18Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.18Affected–Fixed in–
Red HatCert Manager support for Red Hat OpenShift release 1.20Affected–Fixed in–
Red HatRed Hat Discovery 2Affected–Fixed in–
Red HatRed Hat Discovery 2Affected–Fixed in–
Red HatRed Hat Hardened ImagesAffected–Fixed in–
Red HatRed Hat OpenShift AI 3.4Affected–Fixed in–
Red HatRed Hat Update Infrastructure 5Affected–Fixed in–
Red HatRed Hat Update Infrastructure 5Affected–Fixed in–
Red HatRed Hat Update Infrastructure 5Affected–Fixed in–
Red HatRed Hat Update Infrastructure 5Affected–Fixed in–
Red HatRed Hat Update Infrastructure 5Affected–Fixed in–
Red HatRed Hat Update Infrastructure 5Affected–Fixed in–
Red HatRed Hat Update Infrastructure 5Affected–Fixed in–
Red HatRed Hat Enterprise Linux 6Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4Affected–Fixed in–

AI-suggested

Red Hat has published security advisories recommending updating the gnutls packages. While explicit patch availability for Red Hat Enterprise Linux 10 is not confirmed in the provided data, related advisories for Red Hat Hardened Images and Red Hat Enterprise Linux 8 indicate updates are available. Users should follow the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-42015 and the errata RHSA-2026:13274 for instructions on applying updates.

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.

References

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