CVE-2022-49678: soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe of_find_matching_node() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak. In brcmstb_init_sram, it pass dn to of_address_to_resource(), of_address_to_resource() will call of_find_device_by_node() to take reference, so we should release the reference returned by of_find_matching_node().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=4.15<4.19.250 | |
| Linux Kernel | >=4.20<5.4.202 | |
| Linux Kernel | >=5.5<5.10.127 | |
| Linux Kernel | >=5.11<5.15.51 | |
| Linux Kernel | >=5.16<5.18.8 | |
| Linux Kernel | =5.19-rc1 | |
| Linux Kernel | =5.19-rc2 | |
| Linux Kernel | =5.19-rc3 |
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Reference Links
- https://git.kernel.org/stable/c/4f5877bdf7b593e988f1924f4c3df6523f80b39c
- https://git.kernel.org/stable/c/734a4d15142bb4c8ecad2d8ec70d7564e78ae34d
- https://git.kernel.org/stable/c/30bbfeb480ae8b5ee43199d72417b232590440c2
- https://git.kernel.org/stable/c/10ba9d499a9fd82ed40897e734ba19870a879407
- https://git.kernel.org/stable/c/dcafd5463d8f20c4f90ddc138a5738adb99f74c8
- https://git.kernel.org/stable/c/37d838de369b07b596c19ff3662bf0293fdb09ee
Frequently Asked Questions
What is the severity of CVE-2022-49678?
CVE-2022-49678 is classified as a medium severity vulnerability due to a refcount leak in the Linux kernel.
How do I fix CVE-2022-49678?
To fix CVE-2022-49678, upgrade your Linux kernel to a version that includes the patch for this vulnerability.
What versions of the Linux kernel are affected by CVE-2022-49678?
CVE-2022-49678 affects various versions of the Linux kernel between 4.15 and 5.19-rc3.
What is the impact of CVE-2022-49678 on Linux systems?
The impact of CVE-2022-49678 is a potential denial of service due to resource exhaustion from refcount leaks.
Is there a known exploit for CVE-2022-49678?
As of now, there are no public exploits specifically targeting CVE-2022-49678.
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