Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI If lpfc_issue_els_flogi() fails and returns non-zero status, the node reference count is decremented to trigger the release of the nodelist structure. However, if there is a prior registration or dev-loss-evt work pending, the node may be released prematurely. When dev-loss-evt completes, the released node is referenced causing a use-after-free null pointer dereference. Similarly, when processing non-zero ELS PLOGI completion status in lpfc_cmpl_els_plogi(), the ndlp flags are checked for a transport registration before triggering node removal. If dev-loss-evt work is pending, the node may be released prematurely and a subsequent call to lpfc_dev_loss_tmo_handler() results in a use after free ndlp dereference. Add test for pending dev-loss before decrementing the node reference count for FLOGI, PLOGI, PRLI, and ADISC handling.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.15.181 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/10663ebec0ad5c78493a0dd34c9ee4d73d7ca0dfPatch
- https://git.kernel.org/stable/c/577a942df3de2666f6947bdd3a5c9e8d30073424Patch
- https://git.kernel.org/stable/c/c7dc74ab7975c9b96284abfe4cca756d75fa4604Patch
FAQ
What is CVE-2022-49535?
CVE-2022-49535 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix null pointer dereference after failing to issue FLOGI and PLOGI If lpfc_issue_els_flogi() fails and returns non-ze...
How severe is CVE-2022-49535?
CVE-2022-49535 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-2022-49535?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.