CVE-2024-36888— workqueue: Fix selection of wake_cpu in kick_pool()
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I. Basic Information for CVE-2024-36888
Vulnerability Information
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Vulnerability Title
workqueue: Fix selection of wake_cpu in kick_pool()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix selection of wake_cpu in kick_pool() With cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following kernel oops was observed: smp: Bringing up secondary CPUs ... smp: Brought up 1 node, 8 CPUs Unable to handle kernel pointer dereference in virtual kernel address space Failing address: 0000000000000000 TEID: 0000000000000803 [..] Call Trace: arch_vcpu_is_preempted+0x12/0x80 select_idle_sibling+0x42/0x560 select_task_rq_fair+0x29a/0x3b0 try_to_wake_up+0x38e/0x6e0 kick_pool+0xa4/0x198 __queue_work.part.0+0x2bc/0x3a8 call_timer_fn+0x36/0x160 __run_timers+0x1e2/0x328 __run_timer_base+0x5a/0x88 run_timer_softirq+0x40/0x78 __do_softirq+0x118/0x388 irq_exit_rcu+0xc0/0xd8 do_ext_irq+0xae/0x168 ext_int_handler+0xbe/0xf0 psw_idle_exit+0x0/0xc default_idle_call+0x3c/0x110 do_idle+0xd4/0x158 cpu_startup_entry+0x40/0x48 rest_init+0xc6/0xc8 start_kernel+0x3c4/0x5e0 startup_continue+0x3c/0x50 The crash is caused by calling arch_vcpu_is_preempted() for an offline CPU. To avoid this, select the cpu with cpumask_any_and_distribute() to mask __pod_cpumask with cpu_online_mask. In case no cpu is left in the pool, skip the assignment. tj: This doesn't fully fix the bug as CPUs can still go down between picking the target CPU and the wake call. Fixing that likely requires adding cpu_online() test to either the sched or s390 arch code. However, regardless of how that is fixed, workqueue shouldn't be picking a CPU which isn't online as that would result in unpredictable and worse behavior.
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，该漏洞源于内核指针取消引用。
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
II. Public POCs for CVE-2024-36888
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Same Patch Batch · Linux · 2024-05-30 · 93 CVEs total
| CVE-2024-36927 | ipv4: Fix uninit-value access in __ip_make_skb() | |
| CVE-2024-36922 | wifi: iwlwifi: read txq->read_ptr under lock | |
| CVE-2024-36920 | scsi: mpi3mr: Avoid memcpy field-spanning write WARNING | |
| CVE-2024-36916 | blk-iocost: avoid out of bounds shift | |
| CVE-2024-36917 | block: fix overflow in blk_ioctl_discard() | |
| CVE-2024-36914 | drm/amd/display: Skip on writeback when it's not applicable | |
| CVE-2024-36915 | nfc: llcp: fix nfc_llcp_setsockopt() unsafe copies | |
| CVE-2024-36913 | Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails | |
| CVE-2024-36919 | scsi: bnx2fc: Remove spin_lock_bh while releasing resources after upload | |
| CVE-2024-36925 | swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y | |
| CVE-2024-36924 | scsi: lpfc: Release hbalock before calling lpfc_worker_wake_up() | |
| CVE-2024-36926 | powerpc/pseries/iommu: LPAR panics during boot up with a frozen PE | |
| CVE-2024-36928 | s390/qeth: Fix kernel panic after setting hsuid | |
| CVE-2024-36929 | net: core: reject skb_copy(_expand) for fraglist GSO skbs | |
| CVE-2024-36930 | spi: fix null pointer dereference within spi_sync | |
| CVE-2024-36932 | thermal/debugfs: Prevent use-after-free from occurring after cdev removal | |
| CVE-2024-36931 | s390/cio: Ensure the copied buf is NUL terminated | |
| CVE-2024-36933 | nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). | |
| CVE-2024-36934 | bna: ensure the copied buf is NUL terminated | |
| CVE-2024-36935 | ice: ensure the copied buf is NUL terminated |
Showing top 20 of 93 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
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scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
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