What is RHSA-2023:1556?

RHSA-2023:1556 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: kernel-rt security and bug fix update

Which CVE IDs does RHSA-2023:1556 cover?

RHSA-2023:1556 covers the following CVE IDs: CVE-2023-0266, CVE-2023-0461. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2023:1556?

RHSA-2023:1556 has a CVSS v3 base score of 7.8, published by Red Hat Product Security.

Which products are affected by RHSA-2023:1556?

RHSA-2023:1556 affects 32 products, including: Red Hat Enterprise Linux NFV EUS (v.8.4); Red Hat Enterprise Linux RT EUS (v.8.4); kernel-rt-0:4.18.0-305.86.2.rt7.160.el8_4.src as a component of Red Hat Enterprise Linux NFV EUS (v.8.4); kernel-rt-0:4.18.0-305.86.2.rt7.160.el8_4.src as a component of Red Hat Enterprise Linux RT EUS (v.8.4); kernel-rt-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4); and others — see the full list on the advisory page.

RHSA-2023:1556HighCVSS 7.8

Red Hat Security Advisory: kernel-rt security and bug fix update

Vendor

Red Hat Product Security

Published

April 4, 2023

Last Modified

August 6, 2026

🔗 CVE IDs covered (2)

CVE-2023-0266 →CVE-2023-0461 →

📋 Description

CVE-2023-0266 — ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF CVE-2023-0461 — kernel: net/ulp: use-after-free in listening ULP sockets

🎯 Affected products32

Red Hat Enterprise Linux NFV EUS (v.8.4)
Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-0:4.18.0-305.86.2.rt7.160.el8_4.src as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-0:4.18.0-305.86.2.rt7.160.el8_4.src as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-core-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-core-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debug-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debug-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debug-core-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debug-core-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debug-debuginfo-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debug-debuginfo-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debug-devel-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debug-devel-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debug-kvm-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debug-modules-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debug-modules-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debug-modules-extra-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debug-modules-extra-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debuginfo-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debuginfo-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-debuginfo-common-x86_64-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-debuginfo-common-x86_64-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-devel-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-devel-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
kernel-rt-kvm-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-modules-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV EUS (v.8.4)
kernel-rt-modules-0:4.18.0-305.86.2.rt7.160.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT EUS (v.8.4)
+2 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Workaround: To mitigate this issue, skip loading (blacklist) the affected soundcard using modules like: blacklist soundcore blacklist snd blacklist snd_pcm blacklist snd_hda_codec_hdmi blacklist snd_hda_codec_realtek blacklist snd_hda_codec_generic blacklist snd_hda_intel blacklist snd_hda_codec blacklist snd_hda_core blacklist snd_hwdep blacklist snd_timer onto the system till we have a fix available. This can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ Workaround: To mitigate this issue, prevent module tls from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.

🔗 CVE IDs covered (2)

📋 Description

🎯 Affected products32

✅ Remediation

🔗 References (5)