Buffer Overflow Affecting torvalds/linux package, versions [5.15,6.1.191)[6.2,6.6.141)[6.7,6.12.88)[6.13,6.18.30)[6.19,7.0.7)
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-20789135
- published10 Oct 2026
- disclosed15 May 2026
- creditUnknown
Introduced: 15 May 2026
CVE-2026-43490 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.1.191, 6.6.141, 6.12.88, 6.18.30, 7.0.7 or higher.
Overview
Affected versions of this package are vulnerable to Buffer Overflow in the smb_inherit_dacl process. An attacker can cause out-of-bounds reads and writes in kernel memory by crafting a malformed ACE with an invalid SID length in a parent directory's DACL and triggering inheritance via SMB operations. This can lead to exposure of sensitive data, memory corruption, or denial of service by sending specially crafted SMB requests after gaining write access to an ACL-enabled share.
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