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CVE

CVE-2026-45972

smb: client: fix potential UAF and double free in smb2_open_file()
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CVE

CVE-2026-45972

smb: client: fix potential UAF and double free in smb2_open_file()

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix potential UAF and double free in smb2openfile()

Zero out @erriov and @errbuftype before retrying SMB2_open() to

prevent an UAF bug if @data != NULL, otherwise a double free.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

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, https://access.redhat.com/security/cve/CVE-2026-45972, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45972.json, https://nvd.nist.gov/vuln/detail/CVE-2026-45972, https://bugzilla.redhat.com/show_bug.cgi?id=2481973, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00333%
EPSS Percentile
0.26415%
Introduced Version
743f70406264348c0830f38409eb6c40a42fb2db,3a6d6b332f92990958602c1e35ce0173e2dd62e9,b64e3b5d8d759dd4333992e4ba4dadf9359952c8,9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5,e3a43633023e3cacaca60d4b8972d084a2b06236,6.1.163,6.6.124,6.12.70,6.18.10,0,6.2.0,6.7.0,6.13.0,6.19.0
Fix Available
96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74,7425453ea16dbc3bbb0f6cac4d60b537e5e4d151,4d339b219004869e96c4ce56b8891f83a38da4c0,e66dcf7bb9c4df5582c82bc3582725abcbfbea73,ebbbc4bfad4cb355d17c671223d0814ee3ef4eda,6.1.165,6.6.128,6.12.75,6.18.14,6.19.4,6.1.170-1,6.12.85-1,6.8.0-134.134,6.8.0-1060.63,6.8.0-1063.71,6.8.0-1062.69,6.8.0-1063.69,6.8.0-1058.64,6.8.0-1045.48,6.8.0-1060.61,6.8.0-134.134.1,6.8.0-1058.61,6.8.0-1058.61.1,6.8.0-1029.30,6.8.0-1057.58,6.8.0-1060.64,6.8.0-1060.63~22.04.1,6.8.0-1063.71~22.04.1,6.8.0-1062.69~22.04.1,6.8.0-1063.69~22.04.1,6.8.0-136.136~22.04.1,6.8.0-1060.61~22.04.1,6.8.0-134.134.1~22.04.1,6.8.0-1058.61~22.04.1,6.8.0-1057.58~22.04.1,6.8.0-134.134~22.04.1,0:6.12.0-204.92.4.2.el9uek,1:6.12.77-99.140.amzn2023,1:1.0-0.amzn2023

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