CVE-2024-27043

Summary

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

media: edia: dvbdev: fix a use-after-free

In dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed in several error-handling paths. However, *pdvbdev is not set to NULL after dvbdev's deallocation, causing use-after-frees in many places, for example, in the following call chain:

budget_register |-> dvb_dmxdev_init |-> dvb_register_device |-> dvb_dmxdev_release |-> dvb_unregister_device |-> dvb_remove_device |-> dvb_device_put |-> kref_put

When calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in dvb_register_device) could point to memory that had been freed in dvb_register_device. Thereafter, this pointer is transferred to kref_put and triggering a use-after-free.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < d0f5c28333822f9baa5280d813124920720fd856affected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < f20c3270f3ed5aa6919a87e4de9bf6c05fb57086affected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < 096237039d00c839f3e3a5fe6d001bf0db45b644affected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < 0d3fe80b6d175c220b3e252efc6c6777e700e98eaffected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < 437a111f79a2f5b2a5f21e27fdec6f40c8768712affected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < 779e8db7efb22316c8581d6c229636d2f5694a62affected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < 35674111a043b0482a9bc69da8850a83f465b07daffected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < b7586e902128e4fb7bfbb661cb52e4215a65637baffected
LinuxLinuxb61901024776b25ce7b8edc31bb1757c7382a88e < 8c64f4cdf4e6cc5682c52523713af8c39c94e6d5affected
LinuxLinux2.6.21affected
LinuxLinux0 < 2.6.21unaffected
LinuxLinux4.19.311 <= 4.19.*unaffected
LinuxLinux5.4.273 <= 5.4.*unaffected
LinuxLinux5.10.214 <= 5.10.*unaffected
LinuxLinux5.15.153 <= 5.15.*unaffected
LinuxLinux6.1.83 <= 6.1.*unaffected
LinuxLinux6.6.23 <= 6.6.*unaffected
LinuxLinux6.7.11 <= 6.7.*unaffected
LinuxLinux6.8.2 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References