Use of Uninitialized Variable Affecting perf package, versions <0:4.18.0-372.121.1.el8_6
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Test your applications- Snyk ID SNYK-RHEL8-PERF-7891890
- published 4 Sep 2024
- disclosed 19 Jun 2024
Introduced: 19 Jun 2024
CVE-2024-38586 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-372.121.1.el8_6 or higher.
This issue was patched in RHSA-2024:6297.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
r8169: Fix possible ring buffer corruption on fragmented Tx packets.
An issue was found on the RTL8125b when transmitting small fragmented packets, whereby invalid entries were inserted into the transmit ring buffer, subsequently leading to calls to dma_unmap_single() with a null address.
This was caused by rtl8169_start_xmit() not noticing changes to nr_frags which may occur when small packets are padded (to work around hardware quirks) in rtl8169_tso_csum_v2().
To fix this, postpone inspecting nr_frags until after any padding has been applied.
References
- https://access.redhat.com/security/cve/CVE-2024-38586
- https://git.kernel.org/stable/c/078d5b7500d70af2de6b38e226b03f0b932026a6
- https://git.kernel.org/stable/c/0c48185a95309556725f818b82120bb74e9c627d
- https://git.kernel.org/stable/c/54e7a0d111240c92c0f02ceba6eb8f26bf6d6479
- https://git.kernel.org/stable/c/68222d7b4b72aa321135cd453dac37f00ec41fd1
- https://git.kernel.org/stable/c/b6d21cf40de103d63ae78551098a7c06af8c98dd
- https://git.kernel.org/stable/c/c71e3a5cffd5309d7f84444df03d5b72600cc417
- https://git.kernel.org/stable/c/61c1c98e2607120ce9c3fa1bf75e6da909712b27