CVE-2026-80560

Local privilege escalation via forged signal frame

Published Aug 26, 2026 · Updated Aug 27, 2026

Privilege escalation in affected Linux kernel releases on OpenRISC allows local users to read and write arbitrary physical memory. restore_sigcontext() reloads nearly the entire supervision register from an attacker-crafted signal frame, leaving privileged control bits under user control. Any unprivileged local process on an OpenRISC system can clear SPR_SR_DME through rt_sigreturn, disable data-MMU protection, and gain kernel-level control.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in affected Linux kernel releases on OpenRISC allows local users to read and write arbitrary physical memory. restore_sigcontext() reloads nearly the entire supervision register from an attacker-crafted signal frame, leaving privileged control bits under user control. Any unprivileged local process on an OpenRISC system can clear SPR_SR_DME through rt_sigreturn, disable data-MMU protection, and gain kernel-level control.

The record

CVE
CVE-2026-80560
Published
Aug 26, 2026
Updated
Aug 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-15, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1
  2. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <212fc482ddd7f9ccdd74a05eab1cac849350dcd6
  3. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <32ef1b30ad736519f7a207bcc2986f3d4129d972
  4. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <89a91b30685c0493b0fa2b47d0ab41061a63069d
  5. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <a88d688be8d7f03cbf927f2ab454ea9fa58d2979
  6. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <b4d73c3848bae9084fa8b9b2aa76d99a7d8eb17d
  7. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <bc2e24ba6e167ccf374a197457aa5640a802f429
  8. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <cd8b43a71755c516f5c1f265a103438ae9ab15be
  9. Affected versionversion=ac689eb7f9d4e270d1365853b82eece669387e2c <cf1b5514ddf9df098ce7e3741fc9679fd85a4ec6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.1; version=ac689eb7f9d4e270d1365853b82eece669387e2c <212fc482ddd7f9ccdd74a05eab1cac849350dcd6; version=ac689eb7f9d4e270d1365853b82eece669387e2c <32ef1b30ad736519f7a207bcc2986f3d4129d972; version=ac689eb7f9d4e270d1365853b82eece669387e2c <89a91b30685c0493b0fa2b47d0ab41061a63069d; version=ac689eb7f9d4e270d1365853b82eece669387e2c <a88d688be8d7f03cbf927f2ab454ea9fa58d2979; version=ac689eb7f9d4e270d1365853b82eece669387e2c <b4d73c3848bae9084fa8b9b2aa76d99a7d8eb17d; version=ac689eb7f9d4e270d1365853b82eece669387e2c <bc2e24ba6e167ccf374a197457aa5640a802f429; version=ac689eb7f9d4e270d1365853b82eece669387e2c <cd8b43a71755c516f5c1f265a103438ae9ab15be; version=ac689eb7f9d4e270d1365853b82eece669387e2c <cf1b5514ddf9df098ce7e3741fc9679fd85a4ec6

Published CVSS scores

7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-15External Control of System or Configuration Setting
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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