CVE-2024-44971: net: dsa: bcm_sf2: Fix a possible memory leak in bcm_sf2_mdio_register()
First published: Wed Sep 04 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 | =6.11-rc1 | |
| Linux Linux kernel | =6.11-rc2 | |
| debian/linux | <=5.10.223-1 | 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- 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
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-44971
- https://nvd.nist.gov/vuln/detail/CVE-2024-44971
- https://launchpad.net/bugs/cve/CVE-2024-44971
- https://security-tracker.debian.org/tracker/CVE-2024-44971
- https://ubuntu.com/security/CVE-2024-44971
- https://git.kernel.org/linus/e3862093ee93fcfbdadcb7957f5f8974fffa806a
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