Critical
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 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.
Announced Group revision 1
Original source ↗CVE-2026-45972
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-45972
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "743f70406264348c0830f38409eb6c40a42fb2db",
"lessThan": "96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74",
"versionType": "git"
},
{
"status": "affected",
"version": "3a6d6b332f92990958602c1e35ce0173e2dd62e9",
"lessThan": "7425453ea16dbc3bbb0f6cac4d60b537e5e4d151",
"versionType": "git"
},
{
"status": "affected",
"version": "b64e3b5d8d759dd4333992e4ba4dadf9359952c8",
"lessThan": "4d339b219004869e96c4ce56b8891f83a38da4c0",
"versionType": "git"
},
{
"status": "affected",
"version": "9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5",
"lessThan": "e66dcf7bb9c4df5582c82bc3582725abcbfbea73",
"versionType": "git"
},
{
"status": "affected",
"version": "e3a43633023e3cacaca60d4b8972d084a2b06236",
"lessThan": "639deb962986ef2f5e2a6d5a600c66f922471e81",
"versionType": "git"
},
{
"status": "affected",
"version": "e3a43633023e3cacaca60d4b8972d084a2b06236",
"lessThan": "ebbbc4bfad4cb355d17c671223d0814ee3ef4eda",
"versionType": "git"
},
{
"status": "affected",
"version": "6.1.163",
"lessThan": "6.1.165",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.124",
"lessThan": "6.6.128",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.70",
"lessThan": "6.12.75",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.10",
"lessThan": "6.18.14",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/smb2file.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.165",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.128",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.75",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.14",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.4",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smb2file.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-45972
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40100 · Revision 1
- Added to Heist Feed
- Publisher date