CVE-2025-37991

Process crash via uncleared floating-point Trap bit

Published May 20, 2025 · Updated May 11, 2026

Denial of service in the Linux kernel allows local users on PA-RISC systems to terminate a process by triggering a floating-point exception. PA-RISC exception return leaves the floating-point status register's Trap bit set, so the signal handler's next floating-point instruction raises a second SIGFPE instead of resuming normally. Reachability requires local code execution on PA-RISC and a process that enables floating-point traps; the demonstrated consequence is termination of that process.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users on PA-RISC systems to terminate a process by triggering a floating-point exception. PA-RISC exception return leaves the floating-point status register's Trap bit set, so the signal handler's next floating-point instruction raises a second SIGFPE instead of resuming normally. Reachability requires local code execution on PA-RISC and a process that enables floating-point traps; the demonstrated consequence is termination of that process.

The record

CVE
CVE-2025-37991
Published
May 20, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2a1aff3616b3b57aa4a5f8a7762cce1e82493fe6
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6a098c51d18ec99485668da44294565c43dbc106
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6c639af49e9e5615a8395981eaf5943fb40acd6f
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <757ba4d17b868482837c566cfefca59e2296c608
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cf21e890f56b7d0038ddaf25224e4f4c69ecd143
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de3629baf5a33af1919dec7136d643b0662e85ef
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <df3592e493d7f29bae4ffde9a9325de50ddf962e
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec4584495868bd465fe60a3f771915c0e7ce7951
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2a1aff3616b3b57aa4a5f8a7762cce1e82493fe6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6a098c51d18ec99485668da44294565c43dbc106; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6c639af49e9e5615a8395981eaf5943fb40acd6f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <757ba4d17b868482837c566cfefca59e2296c608; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cf21e890f56b7d0038ddaf25224e4f4c69ecd143; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de3629baf5a33af1919dec7136d643b0662e85ef; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <df3592e493d7f29bae4ffde9a9325de50ddf962e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec4584495868bd465fe60a3f771915c0e7ce7951; version=2.6.12

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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