Threats Tagged 'ghsa-4c46-9f7j-r9vq'

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_counter: serialize reset with spinlock Add a global static spinlock to serialize counter fetch+reset operations, preventing concurrent dump-and-reset from underrunning values. The lock is taken before fetching the total so that two parallel resets cannot both read the same counter values and then both subtract them. A global lock is used for simplicity since resets are infrequent. If this becomes a bottleneck, it can be replaced with a per-net lock later.

A vulnerability in the Linux kernel's netfilter nft_counter component was addressed by adding a global static spinlock to serialize counter fetch and reset operations. This prevents concurrent dump-and-reset operations from causing counter value underruns. The fix involves taking a global lock before fetching the total counter value to avoid race conditions between parallel resets. The vulnerability affects version 3.0 of the product.