CVE-2023-0045

Advisory lineage Upstream: 0 Downstream: 44
Modified
Published: 25 Apr 2023, 22:44
Last modified:13 Feb 2025, 16:38

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.28% LOW
0% probability +0.06%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

25 Apr 2023, 22:44
Published
Vulnerability first disclosed
13 Feb 2025, 16:38
Last Modified
Vulnerability information updated

Description

The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set  function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall.  The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Trends

Current EPSS score: 0.28%• Percentile: 51%

Techniques & Countermeasures

  • CWE-610•Externally Controlled Reference to a Resource in Another Sphere

    The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.

Affected Systems

  • debian•debian_linux

    10.0

  • linux•linux_kernel

    ≥ 9137bb27e60e, < a664ec9158eeddd75121d39c9a0758016097fa96 | ≥ 3.16.68, < 3.17 | ≥ 4.4.180, < 4.5 | ≥ 4.9.176, < 4.10 | ≥ 4.14.86, < 4.14.303 | ≥ 4.19.7, < 4.19.270 | ≥ 4.20, < 5.4.229 | ≥ 5.5.0, < 5.10.163 | ≥ 5.11, < 5.15.87 | ≥ 5.16, < 6.0.19 | ≥ 6.1, < 6.1.5

  • netapp•active_iq_unified_manager

    na

  • netapp•h300s_firmware

    na

  • netapp•h410c_firmware

    na

  • netapp•h410s_firmware

    na

  • netapp•h500s_firmware

    na

  • netapp•h700s_firmware

    na

References (5)