Vulnerability details
CVE-2026-45972
Linux LinuxRed Hat Enterprise Linux 10Red Hat Enterprise Linux 9
smb: client: fix potential UAF and double free in smb2_open_file()
CVSS 3.1
9.8Critical
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 7.0High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 6.19 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 3a6d6b332f92990958602c1e35ce0173e2dd62e9 ≤ v < 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.1.163 ≤ v < 6.1.165 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.12.70 ≤ v < 6.12.75 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.18.10 ≤ v < 6.18.14 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 6.6.124 ≤ v < 6.6.128 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 743f70406264348c0830f38409eb6c40a42fb2db ≤ v < 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 ≤ v < e66dcf7bb9c4df5582c82bc3582725abcbfbea73 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b64e3b5d8d759dd4333992e4ba4dadf9359952c8 ≤ v < 4d339b219004869e96c4ce56b8891f83a38da4c0 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e3a43633023e3cacaca60d4b8972d084a2b06236 ≤ v < 639deb962986ef2f5e2a6d5a600c66f922471e81 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e3a43633023e3cacaca60d4b8972d084a2b06236 ≤ v < ebbbc4bfad4cb355d17c671223d0814ee3ef4eda | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Enterprise Linux 10 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Enterprise Linux 9 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Enterprise Linux 9 | All | CVEProject cvelistV5 (CNA) |
References and advisories
9- https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74
- https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151
- https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0
- https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73
- https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81
- https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda
- https://access.redhat.com/security/cve/CVE-2026-45972 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2481973 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json x_sadp-csaf-vex
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Details
- Published
- 2026-05-27
- Last updated
- 2026-10-19
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.32%
Probability of exploitation in 30 days
26.2%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-825Expired Pointer Dereference