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CVE-2024-56768— bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP

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bpf模块中，当在不支持SMP的x86-64内核上调用bpf_get_smp_processor_id时，由于pcpu_hot不可用，会触发page fault错误，导致内核崩溃或不稳定，影响内核的正常运行和程序的执行。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 1ae6921009e5d72787e07ccc04754514ccf6bc99< f4ab7d74247b0150547cf909b3f6f24ee85183df affected
1ae6921009e5d72787e07ccc04754514ccf6bc99< 23579010cf0a12476e96a5f1acdf78a9c5843657 affected
6.10 affected
< 6.10 unaffected
6.12.8≤ 6.12.* unaffected
6.13≤ * unaffected
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I. Basic Information for CVE-2024-56768

Vulnerability Information
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Vulnerability Title
bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP On x86-64 calling bpf_get_smp_processor_id() in a kernel with CONFIG_SMP disabled can trigger the following bug, as pcpu_hot is unavailable: [ 8.471774] BUG: unable to handle page fault for address: 00000000936a290c [ 8.471849] #PF: supervisor read access in kernel mode [ 8.471881] #PF: error_code(0x0000) - not-present page Fix by inlining a return 0 in the !CONFIG_SMP case.
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bpf模块中，当在不支持SMP的x86-64内核上调用bpf_get_smp_processor_id时，由于pcpu_hot不可用，会触发page fault错误，导致内核崩溃或不稳定，影响内核的正常运行和程序的执行。
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 1ae6921009e5d72787e07ccc04754514ccf6bc99 ~ f4ab7d74247b0150547cf909b3f6f24ee85183df -
Linux Linux 6.10 -

II. Public POCs for CVE-2024-56768

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III. Intelligence Information for CVE-2024-56768

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Patches & Fixes for CVE-2024-56768 (2)

Same Patch Batch · Linux · 2025-01-06 · 12 CVEs total

CVE-2024-56757 7.8 HIGH Bluetooth: btusb: mediatek: add intf release flow when usb disconnect
CVE-2024-56759 7.8 HIGH btrfs: fix use-after-free when COWing tree bock and tracing is enabled
CVE-2024-56764 7.8 HIGH ublk: detach gendisk from ublk device if add_disk() fails
CVE-2024-56765 7.8 HIGH powerpc/pseries/vas: Add close() callback in vas_vm_ops struct
CVE-2024-56758 btrfs: check folio mapping after unlock in relocate_one_folio()
CVE-2024-56760 PCI/MSI: Handle lack of irqdomain gracefully
CVE-2024-56761 x86/fred: Clear WFE in missing-ENDBRANCH #CPs
CVE-2024-56763 tracing: Prevent bad count for tracing_cpumask_write
CVE-2024-56767 dmaengine: at_xdmac: avoid null_prt_deref in at_xdmac_prep_dma_memset
CVE-2024-56766 mtd: rawnand: fix double free in atmel_pmecc_create_user()
CVE-2024-56769 media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56768

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