Use of Uninitialized Variable Affecting torvalds/linux package, versions [5.4.103,5.5)[5.10.21,5.11)[5.11.4,5.12)[5.12,6.1.191)[6.2,6.6.160)[6.7,6.12.114)[6.13,6.18.34)[6.19,7.0.11)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-20790136
- published11 Oct 2026
- disclosed24 Jun 2026
- creditUnknown
Introduced: 24 Jun 2026
CVE-2026-52937 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 5.5, 5.11, 5.12, 6.1.191, 6.6.160, 6.12.114, 6.18.34, 7.0.11 or higher.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Variable in the tap_ioctl process when handling the SIOCGIFHWADDR request. An attacker can obtain sensitive kernel stack information by issuing SIOCGIFHWADDR on a macvtap character device, which may expose kernel pointers and potentially defeat kernel address space layout randomization (KASLR).
Note: The Linux kernel project assigns a CVE to every bug fix it ships, whether or not the bug has been shown to be exploitable. This advisory was generated from that process and has not been individually assessed for exploitability. See the kernel's CVE process documentation: https://github.com/torvalds/linux/blob/master/Documentation/process/cve.rst