CVE-2026-98446: Linux kernel · xfs: don't let hidden_space go negative in xfs_metafile_resv_init
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc, 476582d754cdc5110f806001417fea6c77824c13, 930a9c1c321efdaa3e7f8caecb0479cee3baf342
Exploitation evidence
Disclosed: evidence found.
CVE published 18 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 Linux kernel to f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc, 476582d754cdc5110f806001417fea6c77824c13 or 930a9c1c321efdaa3e7f8caecb0479cee3baf342.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel after version 6.15, as indicated by the fixed commit hashes. Users and administrators should update to a Linux kernel version that includes these fixes to mitigate the vulnerability.
Description
A vulnerability in the Linux kernel's XFS filesystem code could cause an integer underflow in the xfs_metafile_resv_init function, leading to incorrect space accounting. This occurs when the reserved metadata blocks fall below the space already used, causing a subtraction of an excessively large amount of space. The issue has been fixed by correcting the logic that adjusts available blocks and fixing an adjacent comment error.