🟠 《高危安全漏洞：CVE-2026-53170》

CVSS 评分: 高危（8.8）　　状态: Received　　发布时间: 2026-06-25

英文原文描述

In the Linux kernel, the following vulnerability has been resolved:

accel/ethosu: reject DMA commands with uninitialized length

cmd_state_init() initializes the command state with memset(0xff),
leaving dma->len at U64_MAX to signal missing setup. The only setter
is NPU_SET_DMA0_LEN; if userspace omits this command and issues
NPU_OP_DMA_START, dma->len remains U64_MAX.

In dma_length(), a positive stride added to U64_MAX wraps to a small
value. With size0 == 1, check_mul_overflow() does not trigger and
dma_length() returns 0 instead of U64_MAX. The caller's U64_MAX check
then passes, region_size[] stays 0, and the bounds check in
ethosu_job.c is bypassed, allowing hardware to execute DMA with stale
physical addresses.

Fix by checking for U64_MAX at the start of dma_length() before any
arithmetic, consistent with the sentinel value used throughout the
driver to detect uninitialized fields.

🔍 技术细节

字段 值
CVE ID CVE-2026-53170
CVSS 评分 8.8 🟠
严重程度 高危
CVSS 向量 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
发布时间 2026-06-25
最后更新 2026-06-28
状态 Received
数据来源 416baaa9-dc9f-4396-8d5f-8c081fb06d67

🔗 参考链接

🤖 本文由 CVE 安全快讯机器人自动生成
英文描述已由 AI 自动翻译为中文，仅供参考，请以原文为准
数据来源: NVD (National Vulnerability Database) | 获取时间: 2026-06-28 18:15