CVE-2026-98475: Linux kernel · s390/cmf: Fix virtual vs physical address confusion
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f4d04425e66af2ecee9d1a49ae0484436f3c2fd1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 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 f4d04425e66af2ecee9d1a49ae0484436f3c2fd1, b11f369be31ea11c746833e4d3ad51dcd6b5fa2b, 748ec2f7f5df9b4fc742546a8bfc8aa5d847353e +1
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 f4d04425e66af2ecee9d1a49ae0484436f3c2fd1, b11f369be31ea11c746833e4d3ad51dcd6b5fa2b, 748ec2f7f5df9b4fc742546a8bfc8aa5d847353e or 7f78226eb743b362f52b212d7763801642539d1c.
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
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A patch is available and has been applied in the Linux kernel. Users should update to a fixed kernel version containing the referenced commits to remediate this issue. Since this is a kernel-level fix, applying the official kernel update is the recommended mitigation.
Description
A vulnerability in the Linux kernel s390/cmf subsystem involved confusion between virtual and physical addresses. The issue caused incorrect address usage by firmware when storing extended format channel measurement data on kernels built with CONFIG_RANDOMIZE_IDENTITY_BASE=y. This has been fixed by defining certain fields as dma64_t and adding the missing virt_to_dma64() translation.
References
- git.kernel.org/stable/c/b11f369be31ea11c746833e4d3ad51dcd6b5fa2b (opens in a new tab)
- git.kernel.org/stable/c/748ec2f7f5df9b4fc742546a8bfc8aa5d847353e (opens in a new tab)
- git.kernel.org/stable/c/7f78226eb743b362f52b212d7763801642539d1c (opens in a new tab)
- git.kernel.org/stable/c/f4d04425e66af2ecee9d1a49ae0484436f3c2fd1 (opens in a new tab)