Data Element containing Pointer Item without Proper Copy Control Element Affecting perf package, versions <0:6.1.82-99.168.amzn2023


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-AMZN2023-PERF-7709314
  • published20 Aug 2024
  • disclosed17 Apr 2024

Introduced: 17 Apr 2024

CVE-2024-26844  (opens in a new tab)
CWE-1098  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 perf to version 0:6.1.82-99.168.amzn2023 or higher.
This issue was patched in ALAS2023-2024-603.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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

block: Fix WARNING in _copy_from_iter

Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space.

Thus the iovec is used in both directions.

Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in.

CVSS Scores

version 3.1