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Red Hat Enterprise Linux kernel-rt security update

published 3 months ago

Summary

A security update is available for the Red Hat Enterprise Linux kernel-rt, which is used by servers and other critical systems. This update fixes a security issue that could allow an attacker to gain unauthorized access to a system. Users are advised to apply the update as soon as possible to ensure the security and stability of their systems.

What to do

Update redhat kernel-rt to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-core to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debug to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debug-core to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debug-debuginfo to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debug-devel to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debug-kvm to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debug-modules to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debug-modules-extra to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debuginfo to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-debuginfo-common-x86_64 to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-devel to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-kvm to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-modules to version 0:4.18.0-553.147.1.rt7.488.el8_10.
Update redhat kernel-rt-modules-extra to version 0:4.18.0-553.147.1.rt7.488.el8_10.

Affected software

Ecosystem	Vendor	Product	Affected versions
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-core	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debug	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debug-core	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debug-debuginfo	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debug-devel	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debug-kvm	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debug-modules	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debug-modules-extra	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debuginfo	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-debuginfo-common-x86_64	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-devel	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-kvm	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-modules	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::nfv	redhat	kernel-rt-modules-extra	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-core	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debug	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debug-core	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debug-debuginfo	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debug-devel	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debug-modules	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debug-modules-extra	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debuginfo	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-debuginfo-common-x86_64	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-devel	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-modules	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10
Red Hat:enterprise_linux:8::realtime	redhat	kernel-rt-modules-extra	< 0:4.18.0-553.147.1.rt7.488.el8_10 Fix: upgrade to 0:4.18.0-553.147.1.rt7.488.el8_10

Original advisory text

Red Hat Security Advisory: kernel-rt security update

References

https://access.redhat.com/errata/RHSA-2026:45116 Vendor Advisory
https://access.redhat.com/security/updates/classification/#important Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2406712 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2492277 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2492437 Third Party Advisory
https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_45116.... Vendor Advisory
https://access.redhat.com/security/cve/CVE-2025-40026 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2025-40026 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2025-40026 Vendor Advisory
https://lore.kernel.org/linux-cve-announce/2025102841-CVE-2025-40026-760b@gregkh... Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-52993 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-52993 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-52993 Vendor Advisory
https://lore.kernel.org/linux-cve-announce/2026062445-CVE-2026-52993-34a2@gregkh... Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-53059 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-53059 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-53059 Vendor Advisory
https://lore.kernel.org/linux-cve-announce/2026062401-CVE-2026-53059-f32e@gregkh... Third Party Advisory

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit (estimated)
Gives an attacker full control (estimated)

Severity

7.0 High

Timeline

Published28 Jul 2026

Updated29 Jul 2026

First seen29 Jul 2026

Sources

RHSA-2026:45116 · OSV

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