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Advisory severityMedium5.5Red Hat Linux

Medium [CVE-2023-4459] Kernel: vmxnet3: null pointer dereference in vmxnet3_rq_cleanup

This medium-severity Red Hat Linux advisory covers CVE-2023-4459 affecting Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2023-4459 Source published Source updated

VulniPulse record published

CVE-2023-4459
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

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Summary

A NULL pointer dereference flaw was found in vmxnet3_rq_cleanup in drivers/net/vmxnet3/vmxnet3_drv.c in the networking sub-component in vmxnet3 in the Linux Kernel. This issue may allow a local attacker with normal user privilege to cause a denial of service due to a missing sanity check during cleanup.

For the Red Hat Enterprise Linux 8.7 (and higher versions) the patch that resolves the problem already applied (so no need to update then). Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-476.

Affected Red Hat products: Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 9.0 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.

Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.

Affected products named by the advisory: Red Hat package: kernel-rt.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions
  • kernel-0:4.18.0-193.133.1.el8_2
  • kernel-rt-0:4.18.0-193.133.1.rt13.184.el8_2
  • kernel-0:4.18.0-305.125.1.el8_4
  • kernel-rt-0:4.18.0-305.125.1.rt7.201.el8_4
  • kernel-0:4.18.0-372.87.1.el8_6
  • kernel-0:5.14.0-70.93.2.el9_0
  • kernel-rt-0:5.14.0-70.93.1.rt21.165.el9_0
  • RHSA-2024:2006
  • RHSA-2024:2008
  • RHSA-2024:1367
  • RHSA-2024:1382
  • RHSA-2024:0412
  • RHSA-2024:1250
  • RHSA-2024:1306

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • In order to mitigate this issue, prevent the affected code from being loaded by blacklisting the kernel module "vmxnet3". For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 ~~~ Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace. ~~~

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Discussion(0)

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