kernel: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()

A vulnerability was found in the Linux kernel's SMC implementation in the smcvlanbytcpsk function. A potential NULL pointer dereference occurred when handling lower network devices, leading to system crashes and resulting in denial of service...

CVE-2021-47559

In the Linux kernel, the following vulnerability has been resolved: net/smc: Fix NULL pointer dereferencing in smcvlanbytcpsk Coverity reports a possible NULL dereferencing problem: in smcvlanbytcpsk: 6. returnednull: netdevlowergetnext returns NULL checked 29 out of 30 times. 7. varassigned:...

UBUNTU-CVE-2021-47559

In the Linux kernel, the following vulnerability has been resolved: net/smc: Fix NULL pointer dereferencing in smcvlanbytcpsk Coverity reports a possible NULL dereferencing problem: in smcvlanbytcpsk: 6. returnednull: netdevlowergetnext returns NULL checked 29 out of 30 times. 7. varassigned:...

CVE-2021-47559

CVE-2021-47559 concerns a NULL pointer dereference in the Linux kernel’s net/smc path, specifically in smc_vlan_by_tcpsk(). The issue could lead to a NULL dereference when iterating lower devices and calling is_vlan_dev, potentially impacting availability. The advisory notes that the manual lower...