net: mediatek: Fix potential NULL pointer dereference in dummy net_device handling
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.10.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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].
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From d5d57501f543f48df8b76a4af59def9a894b396f · fixed in 81e82340170ae82f8cc28e76c13a0069c0d47cb4; From b209bd6d0bffb8991aba568e2d9a892c86a1a43c · fixed in af6bd5c9901b13a26eaf4d57d97a813297791596; From b209bd6d0bffb8991aba568e2d9a892c86a1a43c · fixed in 16f3a28cf5f876a7f3550d8f4c870a7b41bcfaef
- Linux Linux
6.10
- KernelLinux
From 6.10.0 · fixed in 6.10.3