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CVE-2024-56767— dmaengine: at_xdmac: avoid null_prt_deref in at_xdmac_prep_dma_memset

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dmaengine模块的at_xdmac驱动中，at_xdmac_memset_create_desc函数可能返回NULL，例如输入的len值错误或atchan->free_descs_list为空且内存耗尽时，若未进行检查，将导致空指针引用错误，影响DMA操作的正常进行。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux b206d9a23ac71cb905f5fb6e0cd813406f89b678< 3d229600c54e9e0909080ecaf1aab0642aefa5f0 affected
b206d9a23ac71cb905f5fb6e0cd813406f89b678< ed1a8aaa344522c0c349ac9042db27ad130ef913 affected
b206d9a23ac71cb905f5fb6e0cd813406f89b678< 8d364597de9ce2a5f52714224bfe6c2e7a29b303 affected
b206d9a23ac71cb905f5fb6e0cd813406f89b678< fdba6d5e455388377ec7e82a5913ddfcc7edd93b affected
b206d9a23ac71cb905f5fb6e0cd813406f89b678< e658f1c133b854b2ae799147301d82dddb8f3162 affected
b206d9a23ac71cb905f5fb6e0cd813406f89b678< 54376d8d26596f98ed7432a788314bb9154bf3e3 affected
b206d9a23ac71cb905f5fb6e0cd813406f89b678< c43ec96e8d34399bd9dab2f2dc316b904892133f affected
4.2 affected
… +8 more rows
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I. Basic Information for CVE-2024-56767

Vulnerability Information
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Vulnerability Title
dmaengine: at_xdmac: avoid null_prt_deref in at_xdmac_prep_dma_memset
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: at_xdmac: avoid null_prt_deref in at_xdmac_prep_dma_memset The at_xdmac_memset_create_desc may return NULL, which will lead to a null pointer dereference. For example, the len input is error, or the atchan->free_descs_list is empty and memory is exhausted. Therefore, add check to avoid this.
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dmaengine模块的at_xdmac驱动中，at_xdmac_memset_create_desc函数可能返回NULL，例如输入的len值错误或atchan->free_descs_list为空且内存耗尽时，若未进行检查，将导致空指针引用错误，影响DMA操作的正常进行。
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 b206d9a23ac71cb905f5fb6e0cd813406f89b678 ~ 3d229600c54e9e0909080ecaf1aab0642aefa5f0 -
Linux Linux 4.2 -

II. Public POCs for CVE-2024-56767

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III. Intelligence Information for CVE-2024-56767

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Patches & Fixes for CVE-2024-56767 (7)

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-2024-56766 mtd: rawnand: fix double free in atmel_pmecc_create_user()
CVE-2024-56768 bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP
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-2024-56767

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