rhsa-2023_3470
Vulnerability from csaf_redhat
Published
2023-06-06 08:48
Modified
2024-11-06 03:08
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update

Notes

Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. 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.
Details
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: net/ulp: use-after-free in listening ULP sockets (CVE-2023-0461) * kernel: udmabuf: improper validation of array index leading to local privilege escalation (CVE-2023-2008) * kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation (CVE-2023-32233) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * kernel-rt-debug: BUG: MAX_LOCKDEP_CHAINS too low (BZ#2181286) * kernel-rt: update RT source tree to the latest RHEL-9.0.z9 Batch (BZ#2186491) * kernel-rt: INFO: task deadline_test:1778 blocked for more than 622 seconds (BZ#2188662)
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.



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        "text": "An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. 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.",
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        "text": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: net/ulp: use-after-free in listening ULP sockets (CVE-2023-0461)\n\n* kernel: udmabuf: improper validation of array index leading to local privilege escalation (CVE-2023-2008)\n\n* kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation (CVE-2023-32233)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nBug Fix(es):\n\n* kernel-rt-debug: BUG: MAX_LOCKDEP_CHAINS too low (BZ#2181286)\n\n* kernel-rt: update RT source tree to the latest RHEL-9.0.z9 Batch (BZ#2186491)\n\n* kernel-rt: INFO: task deadline_test:1778 blocked for more than 622 seconds (BZ#2188662)",
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          "url": "https://access.redhat.com/errata/RHSA-2023:3470"
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          "details": "1. This flaw can be mitigated by preventing the affected netfilter (nf_tables) kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.\n\n2. If the module cannot be disabled, on non-containerized deployments of Red Hat Enterprise Linux, the mitigation is to disable user namespaces:\n```\n# echo \"user.max_user_namespaces=0\" \u003e /etc/sysctl.d/userns.conf\n# sysctl -p /etc/sysctl.d/userns.conf\n```\nOn containerized deployments, such as Red Hat OpenShift Container Platform, do not use the second mitigation (disabling user namespaces) as the functionality is needed to be enabled. The first mitigation (blacklisting nf_tables) is still viable for containerized deployments, providing the environment is not using netfilter.",
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            "integrityImpact": "HIGH",
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          "category": "impact",
          "details": "Important"
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      ],
      "title": "kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.