CVE-2026-42015: Red Hat Enterprise Linux 10 · Off-by-one Error
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 5.3 Medium.
Data as of 26 Oct 2026, 06:26 UTC
- 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:LExploitation evidence
Disclosed: evidence found.
CVE published 26 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Red HatRed Hat Enterprise Linux 10 | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 10.0 Extended Update Support | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8 | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 9 | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 9.6 Extended Update Support | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.17 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.17 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.17 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.17 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.18 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.18 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.18 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.18 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.18 | Affected– | Fixed in– |
| Red HatCert Manager support for Red Hat OpenShift release 1.20 | Affected– | Fixed in– |
| Red HatRed Hat Discovery 2 | Affected– | Fixed in– |
| Red HatRed Hat Discovery 2 | Affected– | Fixed in– |
| Red HatRed Hat Hardened Images | Affected– | Fixed in– |
| Red HatRed Hat OpenShift AI 3.4 | Affected– | Fixed in– |
| Red HatRed Hat Update Infrastructure 5 | Affected– | Fixed in– |
| Red HatRed Hat Update Infrastructure 5 | Affected– | Fixed in– |
| Red HatRed Hat Update Infrastructure 5 | Affected– | Fixed in– |
| Red HatRed Hat Update Infrastructure 5 | Affected– | Fixed in– |
| Red HatRed Hat Update Infrastructure 5 | Affected– | Fixed in– |
| Red HatRed Hat Update Infrastructure 5 | Affected– | Fixed in– |
| Red HatRed Hat Update Infrastructure 5 | Affected– | Fixed in– |
| Red HatRed Hat Enterprise Linux 6 | Affected– | Fixed in– |
| Red HatRed Hat OpenShift Container Platform 4 | Affected– | Fixed in– |
| Red HatRed Hat OpenShift Container Platform 4 | Affected– | 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
- access.redhat.com/errata/RHSA-2026:13274 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:20611 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:20612 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:20613 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26319 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:26409 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:29197 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:30004 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:30849 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:30850 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:32962 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:33125 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41921 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:43575 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-42015 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2467678 (opens in a new tab)
- gnutls.org/security-new.html (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:58981 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:72502 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:74674 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82304 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82322 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82347 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82354 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82372 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82857 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82888 (opens in a new tab)