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Vulnerability · Published Aug 22, 2024 · Assigned by Linux

CVE-2022-48933netfilter: nf_tables: fix memory leak during stateful obj update

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 88.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane. The transaction logic allocates a temporary object for this purpose. The ->init function was called for this object, so plain kfree() leaks resources. We must call ->destroy function of the object. nft_obj_destroy does this, but it also decrements the module refcount, but the update path doesn't increment it. To avoid special-casing the update object release, do module_get for the update case too and release it via nft_obj_destroy().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.16.12-1DEBIAN-CVE-2022-48933
Debian:13linux5.16.12-1DEBIAN-CVE-2022-48933
Debian:14linux5.16.12-1DEBIAN-CVE-2022-48933
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-48933
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-48933

Affected products (as reported)

VendorProductVersions
Linux Linux d62d0ba97b5803183e70cfded7f7b9da76893bf5 – before 53026346a94c43f35c32b18804041bc483271d87d62d0ba97b5803183e70cfded7f7b9da76893bf5 – before 7e9880e81d3fd6a43c202f205717485290432826d62d0ba97b5803183e70cfded7f7b9da76893bf5 – before e96e204ee6fa46702f6c94c3c69a09e69e0eac52d62d0ba97b5803183e70cfded7f7b9da76893bf5 – before 34bb90e407e3288f610558beaae54ecaa32b11c4d62d0ba97b5803183e70cfded7f7b9da76893bf5 – before dad3bdeef45f81a6e90204bcc85360bb76eccec7
Linux Linux 5.4

References