Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix iscsi_task use after free Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn") added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but then also changed the handling of the case where we detect an already completed task where we now end up doing a goto to the common put/cleanup code. This results in a iscsi_task use after free, because the common cleanup code will do a put on the iscsi_task. This reverts the goto and moves the iscsi_get_conn() to after we've checked if the iscsi_task is valid.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.14, < 5.14.12 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93cPatch
- https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6Patch
- https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93cPatch
- https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6Patch
FAQ
What is CVE-2021-47427?
CVE-2021-47427 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix iscsi_task use after free Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn") added iscsi_get...
How severe is CVE-2021-47427?
CVE-2021-47427 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47427?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.