CVE-2024-27011

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: fix memleak in map from abort path

The delete set command does not rely on the transaction object for

element removal, therefore, a combination of delete element + delete set

from the abort path could result in restoring twice the refcount of the

mapping.

Check for inactive element in the next generation for the delete element

command in the abort path, skip restoring state if next generation bit

has been already cleared. This is similar to the activate logic using

the set walk iterator.

[ 6170.286929] ------------[ cut here ]------------

[ 6170.286939] WARNING: CPU: 6 PID: 790302 at net/netfilter/nf_tables_api.c:2086 nf_tables_chain_destroy+0x1f7/0x220 [nf_tables]

[ 6170.287071] Modules linked in: [...]

[ 6170.287633] CPU: 6 PID: 790302 Comm: kworker/6:2 Not tainted 6.9.0-rc3+ #365

[ 6170.287768] RIP: 0010:nf_tables_chain_destroy+0x1f7/0x220 [nf_tables]

[ 6170.287886] Code: df 48 8d 7d 58 e8

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References