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

EPSS 0.01% · P2

Affected Version Matrix 17

VendorProductVersion RangeStatus
LinuxLinux54d0d83a53508d687fd4a225f8aa1f18559562d0< 95e4f62df23f4df1ce6ef897d44b8e23c260921aaffected
7f4c89400d2997939f6971c7981cc780a219e36b< 14984139f1f2768883332965db566ef26db609e7affected
6fcbcc6c8e52650749692c7613cbe71bf601670d< 15b453db41d36184cf0ccc21e7df624014ab6a1aaffected
75b5016ce325f1ef9c63e5398a1064cf8a7a7354< 3d41dbf82e10c44e53ea602398ab002baec27e75affected
53f408cad05bb987af860af22f4151e5a18e6ee8< a5cbbea145b400e40540c34816d16d36e0374fbcaffected
5c0930ccaad5a74d74e8b18b648c5eb21ed2fe94< 38492f6ee883c7b1d33338bf531a62cff69b4b28affected
5c0930ccaad5a74d74e8b18b648c5eb21ed2fe94< 2f8dea1692eef2b7ba6a256246ed82c365fdc686affected
9a2fc41acb69dd4e2a58d0c04346c3333c2341fcaffected
… +9 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 54d0d83a53508d687fd4a225f8aa1f18559562d0 ~ 95e4f62df23f4df1ce6ef897d44b8e23c260921a -
LinuxLinux 6.7 -

II. Public POCs for CVE-2024-57951

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III. Intelligence Information for CVE-2024-57951

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

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-57951

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