CVE-2024-44971: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: bcm_sf2: Fix a possible memory leak in bcm_sf2_mdio_register() bcm_sf2_mdio_register() calls of_phy_find_device() and then phy_device_remove() in a loop to remove existing PHY devices. of_phy_find_device() eventually calls bus_find_device(), which calls get_device() on the returned struct device * to increment the refcount. The current implementation does not decrement the refcount, which causes memory leak. This commit adds the missing phy_device_free() call to decrement the refcount via put_device() to balance the refcount.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.10 — 5.10.224
linux	linux_kernel	5.11 — 5.15.165
linux	linux_kernel	5.16 — 6.1.105
linux	linux_kernel	6.2 — 6.6.46
linux	linux_kernel	6.7 — 6.10.5
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/7feef10768ea71d468d9bbc1e0d14c461876768c https://git.kernel.org/stable/c/a7d2808d67570e6acae45c2a96e0d59986888e4c https://git.kernel.org/stable/c/b7b8d9f5e679af60c94251fd6728dde34be69a71 https://git.kernel.org/stable/c/c05516c072903f6fb9134b8e7e1ad4bffcdc4819 https://git.kernel.org/stable/c/e3862093ee93fcfbdadcb7957f5f8974fffa806a https://git.kernel.org/stable/c/f3d5efe18a11f94150fee8b3fda9d62079af640a

Other References

https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-44971? +

In the Linux kernel, the following vulnerability has been resolved: net: dsa: bcm_sf2: Fix a possible memory leak in bcm_sf2_mdio_register() bcm_sf2_mdio_register() calls of_phy_find_device() and then phy_device_remove() in a loop to remove existing PHY devices. of_phy_find_device() eventually calls bus_find_device(), which calls get_device() on the returned struct device * to increment the refcount. The current implementation does not decrement the refcount, which causes memory leak. This commit adds the missing phy_device_free() call to decrement the refcount via put_device() to balance the refcount. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-44971? +

CVE-2024-44971 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-44971? +

CVE-2024-44971 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-2024-44971? +

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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CVE-2024-44971