CVE-2021-47328

Summary

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

scsi: iscsi: Fix conn use after free during resets

If we haven't done a unbind target call we can race where iscsi_conn_teardown wakes up the EH thread and then frees the conn while those threads are still accessing the conn ehwait.

We can only do one TMF per session so this just moves the TMF fields from the conn to the session. We can then rely on the iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call to remove the target and it's devices, and know after that point there is no device or scsi-ml callout trying to access the session.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux660d0831d1494a6837b2f810d08b5be092c1f31d < bf20d85a88384574fabb3d53ad62a8af57e7ab11affected
LinuxLinux660d0831d1494a6837b2f810d08b5be092c1f31d < d04958a348e560938410e04a12fb99da9c7e6a00affected
LinuxLinux660d0831d1494a6837b2f810d08b5be092c1f31d < 89812e7957ab0746eab66ed6fc49d52bb4dca250affected
LinuxLinux660d0831d1494a6837b2f810d08b5be092c1f31d < f0a031f7c55ffd944fead1ddaf2aa94df9a158c1affected
LinuxLinux660d0831d1494a6837b2f810d08b5be092c1f31d < fa9542b35ceb4202e8f8d65f440529a63524dca9affected
LinuxLinux660d0831d1494a6837b2f810d08b5be092c1f31d < ec29d0ac29be366450a7faffbcf8cba3a6a3b506affected
LinuxLinux861a9633c22ee8b484e1b4054995f7e1b94a3834affected
LinuxLinux0adcec66bce9b7e84847da09ae3f8bc36e753312affected
LinuxLinux20b38ab5b687df3dbb873cfb0efa946a021f890aaffected
LinuxLinux71b6a23ea944c6a30958bd15a69211e1fd521e1eaffected
LinuxLinux3.2.72 < 3.3affected
LinuxLinux3.4.111 < 3.5affected
LinuxLinux3.18.22 < 3.19affected
LinuxLinux4.1.7 < 4.2affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux4.19.198 <= 4.19.*unaffected
LinuxLinux5.4.134 <= 5.4.*unaffected
LinuxLinux5.10.52 <= 5.10.*unaffected
LinuxLinux5.12.19 <= 5.12.*unaffected
LinuxLinux5.13.4 <= 5.13.*unaffected
LinuxLinux5.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References