CVE - CVE-2022-49873

CVE-ID
CVE-2022-49873	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix wrong reg type conversion in release_reference() Some helper functions will allocate memory. To avoid memory leaks, the verifier requires the eBPF program to release these memories by calling the corresponding helper functions. When a resource is released, all pointer registers corresponding to the resource should be invalidated. The verifier use release_references() to do this job, by apply __mark_reg_unknown() to each relevant register. It will give these registers the type of SCALAR_VALUE. A register that will contain a pointer value at runtime, but of type SCALAR_VALUE, which may allow the unprivileged user to get a kernel pointer by storing this register into a map. Using __mark_reg_not_init() while NOT allow_ptr_leaks can mitigate this problem.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/466ce46f251dfb259a8cbaa895ab9edd6fb56240 URL:https://git.kernel.org/stable/c/466ce46f251dfb259a8cbaa895ab9edd6fb56240 MISC:https://git.kernel.org/stable/c/ae5ccad6c711db0f2ca1231be051935dd128b8f5 URL:https://git.kernel.org/stable/c/ae5ccad6c711db0f2ca1231be051935dd128b8f5 MISC:https://git.kernel.org/stable/c/cedd4f01f67be94735f15123158f485028571037 URL:https://git.kernel.org/stable/c/cedd4f01f67be94735f15123158f485028571037 MISC:https://git.kernel.org/stable/c/f1db20814af532f85e091231223e5e4818e8464b URL:https://git.kernel.org/stable/c/f1db20814af532f85e091231223e5e4818e8464b
Assigning CNA
kernel.org
Date Record Created
20250501	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250501)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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