CVE-2026-31737

Description

In the Linux kernel, the following vulnerability has been resolved: net: ftgmac100: fix ring allocation unwind on open failure ftgmac100_alloc_rings() allocates rx_skbs, tx_skbs, rxdes, txdes, and rx_scratch in stages. On intermediate failures it returned -ENOMEM directly, leaking resources allocated earlier in the function. Rework the failure path to use staged local unwind labels and free allocated resources in reverse order before returning -ENOMEM. This matches common netdev allocation cleanup style.

References

• https://git.kernel.org/stable/c/184b3a500d60ea48d1b176103cff1706c456edf3
• https://git.kernel.org/stable/c/78da43320d9d6ed788147fb085184e4fc801f057
• https://git.kernel.org/stable/c/82f86111f0704ab2ded11a2033bc6cf0be3e09ea
• https://git.kernel.org/stable/c/8351d18989c8642fc53e2e12d94e42314a39b078
• https://git.kernel.org/stable/c/8a71911fc7eeea930153322bc1efc065db8cd97e