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CVE-2024-57951— hrtimers: Handle CPU state correctly on hotplug

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在CPU热插拔过程中未正确处理CPU状态。攻击者利用该漏洞可以导致系统崩溃或权限提升。

AI Predicted 4.4 Difficulty: Theoretical EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 23

VendorProduct Version RangeStatus
Linux Linux 54d0d83a53508d687fd4a225f8aa1f18559562d0< 95e4f62df23f4df1ce6ef897d44b8e23c260921a affected
7f4c89400d2997939f6971c7981cc780a219e36b< 14984139f1f2768883332965db566ef26db609e7 affected
6fcbcc6c8e52650749692c7613cbe71bf601670d< 15b453db41d36184cf0ccc21e7df624014ab6a1a affected
75b5016ce325f1ef9c63e5398a1064cf8a7a7354< 3d41dbf82e10c44e53ea602398ab002baec27e75 affected
53f408cad05bb987af860af22f4151e5a18e6ee8< a5cbbea145b400e40540c34816d16d36e0374fbc affected
5c0930ccaad5a74d74e8b18b648c5eb21ed2fe94< 38492f6ee883c7b1d33338bf531a62cff69b4b28 affected
5c0930ccaad5a74d74e8b18b648c5eb21ed2fe94< 2f8dea1692eef2b7ba6a256246ed82c365fdc686 affected
9a2fc41acb69dd4e2a58d0c04346c3333c2341fc affected
… +15 more rows
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I. Basic Information for CVE-2024-57951

Vulnerability Information
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Vulnerability Title
hrtimers: Handle CPU state correctly on hotplug
Source: CVE Program / CVE List V5
Vulnerability 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 ]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在CPU热插拔过程中未正确处理CPU状态。攻击者利用该漏洞可以导致系统崩溃或权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 54d0d83a53508d687fd4a225f8aa1f18559562d0 ~ 95e4f62df23f4df1ce6ef897d44b8e23c260921a -
Linux Linux 6.7 -

II. Public POCs for CVE-2024-57951

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III. Intelligence Information for CVE-2024-57951

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Patches & Fixes for CVE-2024-57951 (7)

Same Patch Batch · Linux · 2025-02-12 · 7 CVEs total

CVE-2025-21697 7.8 HIGH drm/v3d: Ensure job pointer is set to NULL after job completion
CVE-2025-21699 7.8 HIGH gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag
CVE-2024-57952 7.1 HIGH Revert "libfs: fix infinite directory reads for offset dir"
CVE-2025-21694 fs/proc: fix softlockup in __read_vmcore (part 2)
CVE-2025-21695 platform/x86: dell-uart-backlight: fix serdev race
CVE-2025-21696 mm: clear uffd-wp PTE/PMD state on mremap()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-57951

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