Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk() Coverity reports a possible NULL dereferencing problem: in smc_vlan_by_tcpsk(): 6. returned_null: netdev_lower_get_next returns NULL (checked 29 out of 30 times). 7. var_assigned: Assigning: ndev = NULL return value from netdev_lower_get_next. 1623 ndev = (struct net_device *)netdev_lower_get_next(ndev, &lower); CID 1468509 (#1 of 1): Dereference null return value (NULL_RETURNS) 8. dereference: Dereferencing a pointer that might be NULL ndev when calling is_vlan_dev. 1624 if (is_vlan_dev(ndev)) { Remove the manual implementation and use netdev_walk_all_lower_dev() to iterate over the lower devices. While on it remove an obsolete function parameter comment.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.18, < 5.10.83 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/587acad41f1bc48e16f42bb2aca63bf323380be8Patch
- https://git.kernel.org/stable/c/bb851d0fb02547d03cd40106b5f2391c4fed6ed1Patch
- https://git.kernel.org/stable/c/c94cbd262b6aa3b54d73a1ed1f9c0d19df57f4ffPatch
- https://git.kernel.org/stable/c/587acad41f1bc48e16f42bb2aca63bf323380be8Patch
- https://git.kernel.org/stable/c/bb851d0fb02547d03cd40106b5f2391c4fed6ed1Patch
- https://git.kernel.org/stable/c/c94cbd262b6aa3b54d73a1ed1f9c0d19df57f4ffPatch
FAQ
What is CVE-2021-47559?
CVE-2021-47559 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk() Coverity reports a possible NULL dereferencing problem: in smc_vla...
How severe is CVE-2021-47559?
CVE-2021-47559 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47559?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.