CVEvulnerability

CVE-2023-0045

7.5 HIGH Published 2023-04-25 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-04-25
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.7 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-610

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

Affected configurations

• linux linux kernel (>= 3.16.68 < 3.17) • linux linux kernel (>= 4.4.180 < 4.5) • linux linux kernel (>= 4.9.176 < 4.10) • linux linux kernel (>= 4.14.86 < 4.14.303) • linux linux kernel (>= 4.19.7 < 4.19.270) • linux linux kernel (>= 4.20 < 5.4.229) • linux linux kernel (>= 5.5.0 < 5.10.163) • linux linux kernel (>= 5.11 < 5.15.87) • linux linux kernel (>= 5.16 < 6.0.19) • linux linux kernel (>= 6.1 < 6.1.5) • debian debian linux 10.0 • netapp active iq unified manager • netapp h300s firmware • netapp h500s firmware • netapp h700s firmware • netapp h410s firmware • netapp h410c firmware

Related

Weakness · CWE (1)

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

References