CVE-2024-27043: media: edia: dvbdev: fix a use-after-free
In the Linux kernel, the following vulnerability has been resolved:
media: edia: dvbdev: fix a use-after-free
In dvbregisterdevice, pdvbdev is set equal to dvbdev, which is freed in several error-handling paths. However, pdvbdev is not set to NULL after dvbdev's deallocation, causing use-after-frees in many places, for example, in the following call chain:
budgetregister |-> dvbdmxdevinit |-> dvbregisterdevice |-> dvbdmxdevrelease |-> dvbunregisterdevice |-> dvbremovedevice |-> dvbdeviceput |-> krefput
When calling dvbunregisterdevice, dmxdev->dvbdev (i.e. pdvbdev in dvbregisterdevice) could point to memory that had been freed in dvbregisterdevice. Thereafter, this pointer is transferred to krefput and triggering a use-after-free.
Other sources
In the Linux kernel, the following vulnerability has been resolved:
media: edia: dvbdev: fix a use-after-free
The Linux kernel CVE team has assigned CVE-2024-27043 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024050113-CVE-2024-27043-f2fb@gregkh/T
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 4.19.311 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 5.4.273 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 5.10.214 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 5.15.153 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 6.1.83 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 6.6.23 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 6.7.11 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 6.8.2 - Upgrade
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redhat/kernelto a version that resolves this vulnerability.Fixed in 6.9
Event History
Frequently Asked Questions
What is the severity of CVE-2024-27043?
CVE-2024-27043 is classified with a high severity due to a use-after-free vulnerability in the Linux kernel.
How do I fix CVE-2024-27043?
To fix CVE-2024-27043, update to the latest kernel versions including 4.19.311, 5.4.273, 5.10.214, 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2, or any newer versions available.
What systems are affected by CVE-2024-27043?
CVE-2024-27043 affects various versions of the Linux kernel, specifically those prior to versions 4.19.311, 5.4.273, 5.10.214, 5.15.153, 6.1.83, and others.
Is CVE-2024-27043 actively exploited?
There is currently no publicly available information indicating that CVE-2024-27043 is being actively exploited in the wild.
Who is responsible for addressing CVE-2024-27043?
The maintainers of the Linux kernel are responsible for addressing CVE-2024-27043 through patch releases distributed to users.