Use-after-free in Linux kernel's netfilter: nf_tables component

CVE-2024-1085

What is CVE-2024-1085?

The vulnerability resides in the nf_tables component of the Linux kernel's netfilter subsystem, specifically linked to the nft_setelem_catchall_deactivate() function. This flaw occurs due to inadequate handling of the active state of catch-all set elements across different generations, allowing an attacker to exploit the fault through a double free scenario. Consequently, this poses a significant security risk as it could potentially allow local privilege escalation, enabling an attacker to gain elevated permissions within the system. To address this vulnerability, it is critical to apply the official patch provided beyond commit b1db244ffd041a49ecc9618e8feb6b5c1afcdaa7.

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References