Headline
Red Hat Security Advisory 2024-3462-03
Red Hat Security Advisory 2024-3462-03 - An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Issues addressed include a use-after-free vulnerability.
The following advisory data is extracted from:
https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_3462.json
Red Hat officially shut down their mailing list notifications October 10, 2023. Due to this, Packet Storm has recreated the below data as a reference point to raise awareness. It must be noted that due to an inability to easily track revision updates without crawling Red Hat’s archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.
- Packet Storm Staff
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Red Hat Security Advisory
Synopsis: Moderate: kernel security and bug fix update
Advisory ID: RHSA-2024:3462-03
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2024:3462
Issue date: 2024-05-29
Revision: 03
CVE Names: CVE-2021-47013
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Summary:
An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description:
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
RHEL: Add Spectre-BHB mitigation for AmpereOne (CVE-2023-3006)
kernel: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send (CVE-2021-47013)
kernel: net: bridge: data races indata-races in br_handle_frame_finish() (CVE-2023-52578)
Bug Fix(es):
- XFS: thaw operation hungs if caches are dropped while FS is frozen (JIRA:RHEL-34522)
Solution:
https://access.redhat.com/articles/11258
CVEs:
CVE-2021-47013
References:
https://access.redhat.com/security/updates/classification/#moderate
https://bugzilla.redhat.com/show_bug.cgi?id=2141026
https://bugzilla.redhat.com/show_bug.cgi?id=2266841
https://bugzilla.redhat.com/show_bug.cgi?id=2267758
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A known cache speculation vulnerability, known as Branch History Injection (BHI) or Spectre-BHB, becomes actual again for the new hw AmpereOne. Spectre-BHB is similar to Spectre v2, except that malicious code uses the shared branch history (stored in the CPU Branch History Buffer, or BHB) to influence mispredicted branches within the victim's hardware context. Once that occurs, speculation caused by the mispredicted branches can cause cache allocation. This issue leads to obtaining information that should not be accessible.