CVE-2023-52445
media: pvrusb2: fix use after free on context disconnection
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.26
References 8
git.kernel.org
- stable/c/ec36c134dd020d28e312c2f1766f85525e747aab
- stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d
- stable/c/3233d8bf7893550045682192cb227af7fa3defeb
- stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08
- stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e
- stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795
- stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c
- stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1