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Vulnerability · Published Aug 17, 2024 · Assigned by Linux

CVE-2024-42282net: mediatek: Fix potential NULL pointer dereference in dummy net_device handling

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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 87.1% 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: net: mediatek: Fix potential NULL pointer dereference in dummy net_device handling Move the freeing of the dummy net_device from mtk_free_dev() to mtk_remove(). Previously, if alloc_netdev_dummy() failed in mtk_probe(), eth->dummy_dev would be NULL. The error path would then call mtk_free_dev(), which in turn called free_netdev() assuming dummy_dev was allocated (but it was not), potentially causing a NULL pointer dereference. By moving free_netdev() to mtk_remove(), we ensure it's only called when mtk_probe() has succeeded and dummy_dev is fully allocated. This addresses a potential NULL pointer dereference detected by Smatch[1].

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.10.3-1DEBIAN-CVE-2024-42282
Debian:14linux6.10.3-1DEBIAN-CVE-2024-42282
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-42282
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-42282

Affected products (as reported)

VendorProductVersions
Linux Linux d5d57501f543f48df8b76a4af59def9a894b396f – before 81e82340170ae82f8cc28e76c13a0069c0d47cb4b209bd6d0bffb8991aba568e2d9a892c86a1a43c – before af6bd5c9901b13a26eaf4d57d97a813297791596b209bd6d0bffb8991aba568e2d9a892c86a1a43c – before 16f3a28cf5f876a7f3550d8f4c870a7b41bcfaef
Linux Linux 6.10

References