CVE-2022-48801

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48801
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48801.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48801
Related
Published
2024-07-16T12:15:04Z
Modified
2024-09-18T01:00:20Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

iio: buffer: Fix file related error handling in IIOBUFFERGETFDIOCTL

If we fail to copy the just created file descriptor to userland, we try to clean up by putting back 'fd' and freeing 'ib'. The code uses putunusedfd() for the former which is wrong, as the file descriptor was already published by fdinstall() which gets called internally by anoninode_getfd().

This makes the error handling code leaving a half cleaned up file descriptor table around and a partially destructed 'file' object, allowing userland to play use-after-free tricks on us, by abusing the still usable fd and making the code operate on a dangling 'file->private_data' pointer.

Instead of leaving the kernel in a partially corrupted state, don't attempt to explicitly clean up and leave this to the process exit path that'll release any still valid fds, including the one created by the previous call to anoninodegetfd(). Simply return -EFAULT to indicate the error.

References

Affected packages

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.10-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.10-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}