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Vulnerability DatabaseCVE-2022-49217
CVE-2022-49217:
Linux Kernel vulnerability analysis and mitigation
Overview
In the Linux kernel, a vulnerability was discovered in the SCSI pm8001 driver where the nelem field of the ccb (Command Control Block) used in pm80xxsendabortall() was not initialized to 0. This vulnerability has been assigned CVE-2022-49217 (Kernel Git).
Technical details
The missing initialization could lead to the task completion path seeing the ccb with a non-zero nelem value, resulting in the execution of invalid dmaunmapsg() calls in pm8001ccbtaskfree(). This vulnerability was introduced by commit c6b9ef5779c3 ("[SCSI] pm80xx: NCQ error handling changes") (Kernel Git).
Impact
When exploited, this vulnerability causes a system crash due to invalid memory operations. The crash occurs during the execution of dmaunmapsg() calls with invalid parameters (Kernel Git).
Mitigation and workarounds
The fix involves initializing the ccb nelem field to 0 in three functions: pm8001sendabortall(), pm8001sendreadlog(), and pm80xxsendabortall(). This patch has been merged into the Linux kernel (Kernel Git).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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