CVE-2021-47528
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47528
- Import Source
- https://storage.googleapis.com/osv-test-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
- 2024-09-11T02:00:04Z
- 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
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source