CVE-2026-28529 漏洞深度分析

漏洞概述

CVE 编号: CVE-2026-28529
CVSS 评分: 8.5(HIGH)
CVSS 向量: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE 分类: CWE-416
漏洞状态: Awaiting Analysis
发布时间: 2026-03-25T14:16:33.690
最后更新: 2026-07-14T19:16:54.580

漏洞描述

cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.

影响分析

此漏洞的具体影响取决于实际利用场景。"

修复建议

  1. 及时关注厂商发布的安全更新和补丁
  2. 升级受影响组件到最新版本
  3. 如无法立即升级,参考厂商提供的临时缓解措施
  4. 加强网络访问控制和监控

参考链接

  1. https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750
  2. https://github.com/cryptodev-linux/cryptodev-linux/pull/104
  3. https://nasm.re/posts/cryptodev-linux-vuln/
  4. https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe