smb/client: fix out-of-bounds read in smb2_compound_op()
In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in smb2_compound_op() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len. Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]); Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.
CVE-2026-46155
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-2026-46155
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": "7449d736bbbd160c76b01b8fcdf72f58a8757d4b",
"lessThan": "dffb44b2e06a2908e249f0f93156fc987eee1d1c",
"versionType": "git"
},
{
"status": "affected",
"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4",
"lessThan": "9b3af35645ff9cd334edc130249f9a2fb2bea25f",
"versionType": "git"
},
{
"status": "affected",
"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4",
"lessThan": "512d33bc8ea4ea5c19728ee118715f4b1f4d1926",
"versionType": "git"
},
{
"status": "affected",
"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4",
"lessThan": "a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c",
"versionType": "git"
},
{
"status": "affected",
"version": "ea41367b2a602f602ea6594fc4a310520dcc64f4",
"lessThan": "8d09328dfda089675e4c049f3f256064a1d1996b",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.32",
"lessThan": "6.6.140",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/smb2inode.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.9",
"versionType": "semver"
},
{
"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/smb2inode.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46155
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40146 · Revision 1
- Added to Heist Feed
- Publisher date