CVE-2021-47528

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47528
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47528.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47528
Related
Published
2024-05-24T15:15:15Z
Modified
2024-09-18T01:00:21Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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

usb: cdnsp: Fix a NULL pointer dereference in cdnspendpointinit()

In cdnspendpointinit(), cdnspringalloc() is assigned to pep->ring and there is a dereference of it in cdnspendpointinit(), which could lead to a NULL pointer dereference on failure of cdnspringalloc().

Fix this bug by adding a check of pep->ring.

This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs.

Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug.

Builds with CONFIGUSBCDNSP_GADGET=y show no new warnings, and our static analyzer no longer warns about this code.

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
5.15.15-1

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
5.15.15-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}