CVE-2021-47328
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.76%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.76% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/89812e7957ab0746eab66ed6fc49d52bb4dca250Patch
- https://git.kernel.org/stable/c/bf20d85a88384574fabb3d53ad62a8af57e7ab11Patch
- https://git.kernel.org/stable/c/d04958a348e560938410e04a12fb99da9c7e6a00Patch
- https://git.kernel.org/stable/c/ec29d0ac29be366450a7faffbcf8cba3a6a3b506Patch
- https://git.kernel.org/stable/c/f0a031f7c55ffd944fead1ddaf2aa94df9a158c1Patch
- https://git.kernel.org/stable/c/fa9542b35ceb4202e8f8d65f440529a63524dca9Patch
- https://git.kernel.org/stable/c/89812e7957ab0746eab66ed6fc49d52bb4dca250Patch
- https://git.kernel.org/stable/c/bf20d85a88384574fabb3d53ad62a8af57e7ab11Patch
- https://git.kernel.org/stable/c/d04958a348e560938410e04a12fb99da9c7e6a00Patch
- https://git.kernel.org/stable/c/ec29d0ac29be366450a7faffbcf8cba3a6a3b506Patch
- https://git.kernel.org/stable/c/f0a031f7c55ffd944fead1ddaf2aa94df9a158c1Patch
- https://git.kernel.org/stable/c/fa9542b35ceb4202e8f8d65f440529a63524dca9Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.