Memory Leak Affecting python-perf package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-RHEL7-PYTHONPERF-6802609
  • published2 May 2024
  • disclosed1 May 2024

Introduced: 1 May 2024

CVE-2024-27066  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 python-perf.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-perf package and not the python-perf package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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

virtio: packed: fix unmap leak for indirect desc table

When use_dma_api and premapped are true, then the do_unmap is false.

Because the do_unmap is false, vring_unmap_extra_packed is not called by detach_buf_packed.

if (unlikely(vq->do_unmap)) { curr = id; for (i = 0; i < state->num; i++) { vring_unmap_extra_packed(vq, &vq->packed.desc_extra[curr]); curr = vq->packed.desc_extra[curr].next; } }

So the indirect desc table is not unmapped. This causes the unmap leak.

So here, we check vq->use_dma_api instead. Synchronously, dma info is updated based on use_dma_api judgment

This bug does not occur, because no driver use the premapped with indirect.

CVSS Base Scores

version 3.1