CVE-2026-98117cachefiles: Fix potential UAF/KASAN warning
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Undergoing Analysis
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 builds before 68d459e6e609c31f96a203dd6eec60c634f155e1; 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 builds before 93488ea378b4427598cace558236c110515d743b; from 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 before a67632c8c2688d6e0091529bcefe54bc5ee80e9b | CNA record |
References
- https://git.kernel.org/stable/c/68d459e6e609c31f96a203dd6eec60c634f155e1
- https://git.kernel.org/stable/c/93488ea378b4427598cace558236c110515d743b
- https://git.kernel.org/stable/c/a67632c8c2688d6e0091529bcefe54bc5ee80e9b
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.