CVE-2023-52757

Summary

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

smb: client: fix potential deadlock when releasing mids

All release_mid() callers seem to hold a reference of @mid so there is no need to call kref_put(&mid->refcount, __release_mid) under @server->mid_lock spinlock. If they don't, then an use-after-free bug would have occurred anyways.

By getting rid of such spinlock also fixes a potential deadlock as shown below

CPU 0 CPU 1

cifs_demultiplex_thread() cifs_debug_data_proc_show() release_mid() spin_lock(&server->mid_lock); spin_lock(&cifs_tcp_ses_lock) spin_lock(&server->mid_lock) __release_mid() smb2_find_smb_tcon() spin_lock(&cifs_tcp_ses_lock) deadlock

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7b71843fa7028475b052107664cbe120156a2cfc < 99f476e27aad5964ab13777d84fda67d1356dec1affected
LinuxLinux7b71843fa7028475b052107664cbe120156a2cfc < ce49569079a9d4cad26c0f1d4653382fd9a5ca7aaffected
LinuxLinux7b71843fa7028475b052107664cbe120156a2cfc < 9eb44db68c5b7f5aa22b8fc7de74a3e2e08d1f29affected
LinuxLinux7b71843fa7028475b052107664cbe120156a2cfc < b9bb9607b1fc12fca51f5632da25b36975f599bfaffected
LinuxLinux7b71843fa7028475b052107664cbe120156a2cfc < c1a5962f1462b64fe7b69f20a4b6af8067bc2d26affected
LinuxLinux7b71843fa7028475b052107664cbe120156a2cfc < e6322fd177c6885a21dd4609dc5e5c973d1a2eb7affected
LinuxLinux9871dea42034ee6e73bb2b97ba0284d3d462b230affected
LinuxLinux5.4.6 < 5.5affected
LinuxLinux5.5affected
LinuxLinux0 < 5.5unaffected
LinuxLinux5.10.237 <= 5.10.*unaffected
LinuxLinux5.15.181 <= 5.15.*unaffected
LinuxLinux6.1.64 <= 6.1.*unaffected
LinuxLinux6.5.13 <= 6.5.*unaffected
LinuxLinux6.6.3 <= 6.6.*unaffected
LinuxLinux6.7 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References