CVE-2023-52837

Summary

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

nbd: fix uaf in nbd_open

Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and blk_cleanup_disk") cleans up disk by blk_cleanup_disk() and it won't set disk->private_data as NULL as before. UAF may be triggered in nbd_open() if someone tries to open nbd device right after nbd_put() since nbd has been free in nbd_dev_remove().

Fix this by implementing ->free_disk and free private data in it.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4af5f2e0301311f88c420fcfc5f3c8611ade20ac < 4e9b3ec84dc97909876641dad14e0a2300d6c2a3affected
LinuxLinux4af5f2e0301311f88c420fcfc5f3c8611ade20ac < 879947f4180bc6e83af64eb0515e0cf57fce15dbaffected
LinuxLinux4af5f2e0301311f88c420fcfc5f3c8611ade20ac < 56bd7901b5e9dbc9112036ea615ebcba1565fafeaffected
LinuxLinux4af5f2e0301311f88c420fcfc5f3c8611ade20ac < 327462725b0f759f093788dfbcb2f1fd132f956baffected
LinuxLinux5.14affected
LinuxLinux0 < 5.14unaffected
LinuxLinux6.1.63 <= 6.1.*unaffected
LinuxLinux6.5.12 <= 6.5.*unaffected
LinuxLinux6.6.2 <= 6.6.*unaffected
LinuxLinux6.7 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References