CVE-2022-49321

Summary

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

xprtrdma: treat all calls not a bcall when bc_serv is NULL

When a rdma server returns a fault format reply, nfs v3 client may treats it as a bcall when bc service is not exist.

The debug message at rpcrdma_bc_receive_call are,

[56579.837169] RPC: rpcrdma_bc_receive_call: callback XID 00000001, length=20 [56579.837174] RPC: rpcrdma_bc_receive_call: 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04

After that, rpcrdma_bc_receive_call will meets NULL pointer as,

[ 226.057890] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8 … [ 226.058704] RIP: 0010:_raw_spin_lock+0xc/0x20 … [ 226.059732] Call Trace: [ 226.059878] rpcrdma_bc_receive_call+0x138/0x327 [rpcrdma] [ 226.060011] __ib_process_cq+0x89/0x170 [ib_core] [ 226.060092] ib_cq_poll_work+0x26/0x80 [ib_core] [ 226.060257] process_one_work+0x1a7/0x360 [ 226.060367] ? create_worker+0x1a0/0x1a0 [ 226.060440] worker_thread+0x30/0x390 [ 226.060500] ? create_worker+0x1a0/0x1a0 [ 226.060574] kthread+0x116/0x130 [ 226.060661] ? kthread_flush_work_fn+0x10/0x10 [ 226.060724] ret_from_fork+0x35/0x40 …

Affected Software

VendorProductVersion RangeStatus
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < 8e3943c50764dc7c5f25911970c3ff062ec1f18caffected
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < 998d35a2aff4b81a1c784f3aa45cd3afff6814c1affected
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < da99331fa62131a38a0947a8204c5208de7b0454affected
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < 8dbae5affbdbf524b48000f9d357925bb001e5f4affected
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < a3fc8051ee061e31db13e2fe011e8e0b71a7f815affected
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < 90c4f73104016748533a5707ecd15930fbeff402affected
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < 91784f3d77b73885e1b2e6b59d3cbf0de0a1126aaffected
LinuxLinux63cae47005af51c937f4cdcc4835f29075add2ba < 11270e7ca268e8d61b5d9e5c3a54bd1550642c9caffected
LinuxLinux4.4affected
LinuxLinux0 < 4.4unaffected
LinuxLinux4.14.283 <= 4.14.*unaffected
LinuxLinux4.19.247 <= 4.19.*unaffected
LinuxLinux5.4.198 <= 5.4.*unaffected
LinuxLinux5.10.122 <= 5.10.*unaffected
LinuxLinux5.15.47 <= 5.15.*unaffected
LinuxLinux5.17.15 <= 5.17.*unaffected
LinuxLinux5.18.4 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References