cachefiles: Fix potential UAF/KASAN warning
In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix potential UAF/KASAN warning Currently, trace_cachefiles_coherency() is being passed a pointer to a __be64 lain over the coherency data in struct cachefiles_xattr so that it can display the first 8 bytes. However, the data is of variable length and could even be 0 bytes. This could lead to a UAF or KASAN warning. Fix this by making sure the buffer has room for at least 8 bytes and that those 8 bytes are pre-cleared. Further, those bytes are not 8-byte aligned, so fix the tracepoint to extract the data as four 2-byte words (they are 2-byte aligned) and reassemble the __be64. The compiler will convert this into a single 8-byte load where the CPU supports it.
CVE-2026-98117
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-2026-98117
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": "229105e5cfd9832a9ef1368c96e0098ec3a5fbf0",
"lessThan": "68d459e6e609c31f96a203dd6eec60c634f155e1",
"versionType": "git"
},
{
"status": "affected",
"version": "229105e5cfd9832a9ef1368c96e0098ec3a5fbf0",
"lessThan": "93488ea378b4427598cace558236c110515d743b",
"versionType": "git"
},
{
"status": "affected",
"version": "229105e5cfd9832a9ef1368c96e0098ec3a5fbf0",
"lessThan": "a67632c8c2688d6e0091529bcefe54bc5ee80e9b",
"versionType": "git"
}
],
"programFiles": [
"fs/cachefiles/xattr.c",
"include/trace/events/cachefiles.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/cachefiles/xattr.c",
"include/trace/events/cachefiles.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98117
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38217 · Revision 1
- Added to Heist Feed
- Publisher date