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CVE-2024-42265

Disclosure Date: August 17, 2024 •
CVE-2024-42265
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Description

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

protect the fetch of –>fd[fd] in do_dup2() from mispredictions

both callers have verified that fd is not greater than –>max_fds;
however, misprediction might end up with

    tofree = fdt->fd[fd];

being speculatively executed. That’s wrong for the same reasons
why it’s wrong in close_fd()/file_close_fd_locked(); the same
solution applies – array_index_nospec(fd, fdt->max_fds) could differ
from fd only in case of speculative execution on mispredicted path.

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CVSS V3 Severity and Metrics
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Impact Score:
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Attack Vector (AV):
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General Information

Offensive Application
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Utility Class
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Ports
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OS
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Vulnerable Versions
Linux ed42e8ff509d
Linux not down converted
Prerequisites
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Discovered By
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PoC Author
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Metasploit Module
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Reporter
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Vendors

  • Linux

Products

  • Linux
Technical Analysis