CVE-2024-38586

HIGH
Published Jun 19, 2024 Modified Sep 17, 2025 CWE-787

Description

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.

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CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

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/61c1c98e2607120ce9c3fa1bf75e6da909712b27 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/078d5b7500d70af2de6b38e226b03f0b932026a6 https://git.kernel.org/stable/c/0c48185a95309556725f818b82120bb74e9c627d https://git.kernel.org/stable/c/54e7a0d111240c92c0f02ceba6eb8f26bf6d6479 https://git.kernel.org/stable/c/61c1c98e2607120ce9c3fa1bf75e6da909712b27 https://git.kernel.org/stable/c/68222d7b4b72aa321135cd453dac37f00ec41fd1 https://git.kernel.org/stable/c/b6d21cf40de103d63ae78551098a7c06af8c98dd https://git.kernel.org/stable/c/c71e3a5cffd5309d7f84444df03d5b72600cc417

Frequently Asked Questions

What is CVE-2024-38586? +
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. It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2024-38586? +
CVE-2024-38586 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-38586? +
CVE-2024-38586 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-38586? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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