CVE-2024-45020— bpf: Fix a kernel verifier crash in stacksafe()
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I. Basic Information for CVE-2024-45020
Vulnerability Information
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Vulnerability Title
bpf: Fix a kernel verifier crash in stacksafe()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a kernel verifier crash in stacksafe() Daniel Hodges reported a kernel verifier crash when playing with sched-ext. Further investigation shows that the crash is due to invalid memory access in stacksafe(). More specifically, it is the following code: if (exact != NOT_EXACT && old->stack[spi].slot_type[i % BPF_REG_SIZE] != cur->stack[spi].slot_type[i % BPF_REG_SIZE]) return false; The 'i' iterates old->allocated_stack. If cur->allocated_stack < old->allocated_stack the out-of-bound access will happen. To fix the issue add 'i >= cur->allocated_stack' check such that if the condition is true, stacksafe() should fail. Otherwise, cur->stack[spi].slot_type[i % BPF_REG_SIZE] memory access is legal.
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bpf组件存在内核验证器崩溃问题。
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-2024-45020
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Same Patch Batch · Linux · 2024-09-11 · 23 CVEs total
| CVE-2024-45019 | net/mlx5e: Take state lock during tx timeout reporter | |
| CVE-2024-45010 | mptcp: pm: only mark 'subflow' endp as available | |
| CVE-2024-45009 | mptcp: pm: only decrement add_addr_accepted for MPJ req | |
| CVE-2024-45011 | char: xillybus: Check USB endpoints when probing device | |
| CVE-2024-45013 | nvme: move stopping keep-alive into nvme_uninit_ctrl() | |
| CVE-2024-45012 | nouveau/firmware: use dma non-coherent allocator | |
| CVE-2024-45015 | drm/msm/dpu: move dpu_encoder's connector assignment to atomic_enable() | |
| CVE-2024-45014 | s390/boot: Avoid possible physmem_info segment corruption | |
| CVE-2024-45016 | netem: fix return value if duplicate enqueue fails | |
| CVE-2024-45018 | netfilter: flowtable: initialise extack before use | |
| CVE-2024-45017 | net/mlx5: Fix IPsec RoCE MPV trace call | |
| CVE-2024-46672 | wifi: brcmfmac: cfg80211: Handle SSID based pmksa deletion | |
| CVE-2024-45021 | memcg_write_event_control(): fix a user-triggerable oops | |
| CVE-2024-45023 | md/raid1: Fix data corruption for degraded array with slow disk | |
| CVE-2024-45022 | mm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0 | |
| CVE-2024-45024 | mm/hugetlb: fix hugetlb vs. core-mm PT locking | |
| CVE-2024-45026 | s390/dasd: fix error recovery leading to data corruption on ESE devices | |
| CVE-2024-45025 | fix bitmap corruption on close_range() with CLOSE_RANGE_UNSHARE | |
| CVE-2024-45027 | usb: xhci: Check for xhci->interrupters being allocated in xhci_mem_clearup() | |
| CVE-2024-45029 | i2c: tegra: Do not mark ACPI devices as irq safe |
Showing top 20 of 23 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: 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
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
V. Comments for CVE-2024-45020
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