CVE-2023-52445

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < ec36c134dd020d28e312c2f1766f85525e747aabaffected
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < 47aa8fcd5e8b5563af4042a00f25ba89bef8f33daffected
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < 3233d8bf7893550045682192cb227af7fa3defebaffected
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < ec3634ebe23fc3c44ebc67c6d25917300bc68c08affected
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < 30773ea47d41773f9611ffb4ebc9bda9d19a9e7eaffected
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < 2cf0005d315549b8d2b940ff96a66c2a889aa795affected
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < 437b5f57732bb4cc32cc9f8895d2010ee9ff521caffected
LinuxLinuxe5be15c63804e05b5a94197524023702a259e308 < ded85b0c0edd8f45fec88783d7555a5b982449c1affected
LinuxLinux2.6.26affected
LinuxLinux0 < 2.6.26unaffected
LinuxLinux4.19.306 <= 4.19.*unaffected
LinuxLinux5.4.268 <= 5.4.*unaffected
LinuxLinux5.10.209 <= 5.10.*unaffected
LinuxLinux5.15.148 <= 5.15.*unaffected
LinuxLinux6.1.75 <= 6.1.*unaffected
LinuxLinux6.6.14 <= 6.6.*unaffected
LinuxLinux6.7.2 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References