Vulnerability-Lookup

RHSA-2024:2846

Vulnerability from csaf_redhat - Published: 2024-05-15 00:29 - Updated: 2026-03-18 02:38

Summary

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

Severity

Moderate

Notes

Topic: An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 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.

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: untrusted VMM can trigger int80 syscall handling (CVE-2024-25744) * kernel: netfilter: nftables: exthdr: fix 4-byte stack OOB write (CVE-2023-52628) Bug Fix(es): * kernel-rt: kernel: untrusted VMM can trigger int80 syscall handling (JIRA:RHEL-30421) * kernel-rt: kernel: netfilter: nftables: exthdr: fix 4-byte stack OOB write (JIRA:RHEL-31093) * kernel-rt: update RT source tree to the latest RHEL-9.2 ad hoc schedule build (JIRA:RHEL-34746)

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.

CVE-2023-52628

An out-of-bounds write flaw was found in the Linux kernel’s Netfilter functionality. This flaw allows a local user to crash or potentially escalate their privileges on the system.

7.0 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-787 - Out-of-bounds Write

Vendor Fix 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. https://access.redhat.com/errata/RHSA-2024:2846

Workaround In order to trigger the issue, it requires the ability to create user/net namespaces. On non-containerized deployments of Red Hat Enterprise Linux 8, you can disable user namespaces by setting user.max_user_namespaces to 0: # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf On containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.

CVE-2024-25744

A flaw was found in the Linux kernel. A VMM can inject external interrupts on any arbitrary vector at any time, which may allow the guest OS to be manipulated from the VMM side.

5.6 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Workaround This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.

References

URL

Category

	https://access.redhat.com/errata/RHSA-2024:2846	self
	https://access.redhat.com/security/updates/classi…	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2263875	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2272041	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2023-52628	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2272041	external
	https://www.cve.org/CVERecord?id=CVE-2023-52628	external
	https://nvd.nist.gov/vuln/detail/CVE-2023-52628	external
	https://lore.kernel.org/linux-cve-announce/202403…	external
	https://access.redhat.com/security/cve/CVE-2024-25744	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2263875	external
	https://www.cve.org/CVERecord?id=CVE-2024-25744	external
	https://nvd.nist.gov/vuln/detail/CVE-2024-25744	external
	https://git.kernel.org/pub/scm/linux/kernel/git/t…	external

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          "text": "An out-of-bounds write flaw was found in the Linux kernel\u2019s Netfilter functionality. This flaw allows a local user to crash or potentially escalate their privileges on the system.",
          "title": "Vulnerability description"
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          "text": "kernel: netfilter: nftables: exthdr: fix 4-byte stack OOB write",
          "title": "Vulnerability summary"
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          "text": "This issue is fixed in Red Hat Enterprise Linux 9.",
          "title": "Statement"
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2023-52628"
        },
        {
          "category": "external",
          "summary": "RHBZ#2272041",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2272041"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2023-52628",
          "url": "https://www.cve.org/CVERecord?id=CVE-2023-52628"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-52628",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52628"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2024032850-CVE-2023-52628-14fb@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2024032850-CVE-2023-52628-14fb@gregkh/T"
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      "release_date": "2024-03-28T00:00:00+00:00",
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          "title": "Vulnerability description"
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: untrusted VMM can trigger int80 syscall handling"
    }
  ]
}

CVE-2024-25744 (GCVE-0-2024-25744)

Vulnerability from cvelistv5 – Published: 2024-02-12 00:00 – Updated: 2025-05-07 21:07

Summary

In the Linux kernel before 6.6.7, an untrusted VMM can trigger int80 syscall handling at any given point. This is related to arch/x86/coco/tdx/tdx.c and arch/x86/mm/mem_encrypt_amd.c.

Severity ?

8.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE

Assigner

mitre

References

URL

CVE-2023-52628 (GCVE-0-2023-52628)

Vulnerability from cvelistv5 – Published: 2024-03-28 07:33 – Updated: 2025-11-04 17:14

Title

netfilter: nftables: exthdr: fix 4-byte stack OOB write

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2024:2846

CVE-2024-25744 (GCVE-0-2024-25744)

CVE-2023-52628 (GCVE-0-2023-52628)

Tags

Sightings

Nomenclature