smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs() In move_smb2_ea_to_cifs(), the while (src_size > 0) loop condition is insufficient. It allows iteration to continue even if the remaining src_size is too small to contain a complete smb2_ea_info structure. Consequently, reads of ea_name_length and ea_value_length can occur out-of-bounds. Fix this by ensuring src_size >= sizeof(*src) before attempting to read any structure fields. Additionally, reject any next_entry_offset that is smaller than sizeof(*src) or that would advance the pointer beyond the available buffer. Note that for calls where the server returns a malformed EA list, the error returned to userspace changes from -ENODATA (getxattr) or -ERANGE (listxattr) to -EIO. This correctly signals a server protocol error rather than misleadingly indicating "attribute not present" or "output buffer too small".
CVE-2026-98170
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-2026-98170
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": "95907fea4fd8ccc736e0a428e52159b4d42b9958",
"lessThan": "61812323c037a94e2e7f0db7ee740c34b126bffe",
"versionType": "git"
},
{
"status": "affected",
"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958",
"lessThan": "d3546cecbf81d98bf3b472d341f981eb48c04f47",
"versionType": "git"
},
{
"status": "affected",
"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958",
"lessThan": "34a3942e787b9c59758115bd65fe1ec89d68c7a4",
"versionType": "git"
},
{
"status": "affected",
"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958",
"lessThan": "13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca",
"versionType": "git"
},
{
"status": "affected",
"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958",
"lessThan": "eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb",
"versionType": "git"
}
],
"programFiles": [
"fs/smb/client/smb2ops.c",
"fs/smb/client/trace.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smb2ops.c",
"fs/smb/client/trace.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98170
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48867 · Revision 1
- Added to Heist Feed
- Publisher date