CVE-2024-57951

HIGH EPSS 12.8%
Published Feb 12, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 12, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: hrtimers: Handle CPU state correctly on hotplug Consider a scenario where a CPU transitions from CPUHP_ONLINE to halfway through a CPU hotunplug down to CPUHP_HRTIMERS_PREPARE, and then back to CPUHP_ONLINE: Since hrtimers_prepare_cpu() does not run, cpu_base.hres_active remains set to 1 throughout. However, during a CPU unplug operation, the tick and the clockevents are shut down at CPUHP_AP_TICK_DYING. On return to the online state, for instance CFS incorrectly assumes that the hrtick is already active, and the chance of the clockevent device to transition to oneshot mode is also lost forever for the CPU, unless it goes back to a lower state than CPUHP_HRTIMERS_PREPARE once. This round-trip reveals another issue; cpu_base.online is not set to 1 after the transition, which appears as a WARN_ON_ONCE in enqueue_hrtimer(). Aside of that, the bulk of the per CPU state is not reset either, which means there are dangling pointers in the worst case. Address this by adding a corresponding startup() callback, which resets the stale per CPU state and sets the online flag. [ tglx: Make the new callback unconditionally available, remove the online modification in the prepare() callback and clear the remaining state in the starting callback instead of the prepare callback ]

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
12.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 14

VendorProductVersionRange
linuxlinux_kernel*≥4.19.302  –  <4.20
linuxlinux_kernel*≥5.4.264  –  <5.4.290
linuxlinux_kernel*≥5.10.204  –  <5.10.234
linuxlinux_kernel*≥5.15.143  –  <5.15.177
linuxlinux_kernel*≥6.1.68  –  <6.1.127
linuxlinux_kernel*≥6.6.7  –  <6.6.74
linuxlinux_kernel*≥6.7  –  <6.12.11
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any

References 11

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-355557.html
  • git.kernel.org https://git.kernel.org/stable/c/14984139f1f2768883332965db566ef26db609e7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/15b453db41d36184cf0ccc21e7df624014ab6a1a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f8dea1692eef2b7ba6a256246ed82c365fdc686
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/38492f6ee883c7b1d33338bf531a62cff69b4b28
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3d41dbf82e10c44e53ea602398ab002baec27e75
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95e4f62df23f4df1ce6ef897d44b8e23c260921a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a5cbbea145b400e40540c34816d16d36e0374fbc
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/14984139f1f2768883332965db566ef26db609e7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/15b453db41d36184cf0ccc21e7df624014ab6a1a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f8dea1692eef2b7ba6a256246ed82c365fdc686
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/38492f6ee883c7b1d33338bf531a62cff69b4b28
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3d41dbf82e10c44e53ea602398ab002baec27e75
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95e4f62df23f4df1ce6ef897d44b8e23c260921a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a5cbbea145b400e40540c34816d16d36e0374fbc
    Patch