smb/client: fix out-of-bounds read in symlink_data()
In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in symlink_data() Since smb2_check_message() returns success without length validation for the symlink error response, in symlink_data() it is possible for iov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer only contains the base SMB2 header (64 bytes), accessing err->ErrorContextCount (at offset 66) or err->ByteCount later in symlink_data() will cause an out-of-bounds read.
CVE-2026-46185
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-2026-46185
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": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "2be11faf79e49fb8250a181ff0b4d2b2f084af83",
"versionType": "git"
},
{
"status": "affected",
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "ef6495d4df6e7af8f3de67e65150881c880f696c",
"versionType": "git"
},
{
"status": "affected",
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "15dc0a4de743a1aaa7b859b3aea79f08c695396c",
"versionType": "git"
},
{
"status": "affected",
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "b8c8a704f0bc133deb171f6aeb6f3a684203e212",
"versionType": "git"
},
{
"status": "affected",
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "b9561402489d41149f63e001a74384863b7b30a6",
"versionType": "git"
},
{
"status": "affected",
"version": "76894f3e2f71177747b8b4763fb180e800279585",
"lessThan": "d62b8d236fab503c6fec1d3e9a38bea71feaca20",
"versionType": "git"
},
{
"status": "affected",
"version": "2d046892a493d9760c35fdaefc3017f27f91b621",
"versionType": "git"
},
{
"status": "affected",
"version": "6.0.16",
"lessThan": "6.1",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/smb2misc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.88",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smb2misc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46185
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40152 · Revision 1
- Added to Heist Feed
- Publisher date