Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register NFT_META_BRI_IIFHWADDR declares its destination register with len = ETH_ALEN (6 bytes), which the register-init tracking rounds up to two 32-bit registers (8 bytes). nft_meta_bridge_get_eval() then does memcpy(dest, br_dev->dev_addr, ETH_ALEN), writing only 6 bytes and leaving the upper 2 bytes of the second register as uninitialised nft_do_chain() stack. A downstream load of that register span leaks those stale bytes to userspace. Zero the second register before the memcpy so the full declared span is written.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
cbd2257dc96e3e46217540fcb095a757ffa20d96 to < 07acb9798477535933bd658ac9fa85b6cb10d995affectedcbd2257dc96e3e46217540fcb095a757ffa20d96 to < f1e81d571e375d10e50e852223593493d98c1bacaffectedcbd2257dc96e3e46217540fcb095a757ffa20d96 to < c7d573551f9286100a055ef696cde6af54549677affected
Linux Linux
Default version status: affected
6.18affected0 to < 6.18unaffected6.18.36 to ≤ 6.18.*unaffected7.0.13 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected