CVE-2026-98920: Linux kernel · netfs: Fix missing alloc tagging of direct mempool allocations
Source GCVE Database
Not known to be exploited · fixed in b78b728e21c32ec4c330b299f657fb1eb02dffc2 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in b78b728e21c32ec4c330b299f657fb1eb02dffc2, 37a2042748bc880df03ff8315db86ed82991fbb8, 7.2 +2
Exploitation evidence
Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix has been applied in the Linux kernel source to wrap direct mempool allocations with allocation tagging hooks. Users should update to the fixed kernel version containing this patch. No additional mitigation is required as the issue is resolved by this official fix.
Description
A vulnerability in the Linux kernel's netfs subsystem related to missing allocation tagging of direct mempool allocations has been resolved. The issue caused warnings and missing allocation tags when CONFIG_MEM_ALLOC_PROFILING_DEBUG was enabled, affecting memory allocation tracking during CIFS mount operations. The fix involves wrapping direct allocation calls with proper allocation tagging hooks to ensure correct profiling and avoid warnings.
References
- nvd.nist.gov/vuln/detail/CVE-2026-98920 (opens in a new tab)
- git.kernel.org/stable/c/37a2042748bc880df03ff8315db86ed82991fbb8 (opens in a new tab)
- git.kernel.org/stable/c/5c03da745171485fd181f17b69213464f6d05f3d (opens in a new tab)
- git.kernel.org/stable/c/b78b728e21c32ec4c330b299f657fb1eb02dffc2 (opens in a new tab)