Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: ibmveth: h_free logical LAN on open-fail after register ibmveth_open() registers the logical LAN, then allocates the RX buffer pools. A pool failure jumps to out_free_buffer_pools without h_free_logical_lan(), so PHYP still owns the buffer-list page when it is unmapped. request_irq() failure already issued the hypercall before taking the same label. Move that h_free to the shared post-register unwind so both paths deregister before the buffer list is unmapped.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• git.kernel.org/stable/c/a065bd31ec462f6f9c267026b708dd020f122723
• git.kernel.org/stable/c/af0524bf4ce1a4cbd2946aa81751582951cfcab5
• git.kernel.org/stable/c/c54bbdf6f0731102a4bf7f5e4ee535b3ea415996
• git.kernel.org/stable/c/d24fdec1413c656d29298097926e77542785ca0c
• git.kernel.org/stable/c/decb4d4ead2c71ef698727734ab5024a872eb372