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Red Hat: CVE-2023-46813: kernel: SEV-ES local priv escalation (Multiple Advisories)

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Red Hat: CVE-2023-46813: kernel: SEV-ES local priv escalation (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
10/27/2023
Created
01/27/2024
Added
01/26/2024
Modified
12/05/2024

Description

An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2023-46813
  • RHSA-2024:0431
  • RHSA-2024:0432
  • RHSA-2024:0439
  • RHSA-2024:0448
  • RHSA-2024:0461
  • RHSA-2024:0575
  • RHSA-2024:0724
  • RHSA-2024:0881
  • RHSA-2024:0897
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