CVE-2026-45972
Linux Kernel use-after-free
- Published27 May 2026
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
- https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0
- https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81
- https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151
- https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74
- https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73
- https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda
References
- https://access.redhat.com/security/cve/CVE-2026-45972
- https://bugzilla.redhat.com/show_bug.cgi?id=2481973
- https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0
- https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81
- https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151
- https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74
- https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73
- https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2026-45972 being actively exploited?
CVE-2026-45972 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.33%.
How severe is CVE-2026-45972?
CVE-2026-45972 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.33% probability of exploitation.
Which products are affected by CVE-2026-45972?
Affected products include Linux Kernel.
How do I fix CVE-2026-45972?
Upgrade affected software to a fixed version, for example Linux Kernel 6.1.165 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-45972 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.