Vulnerability · CVE-2025-38261
In the Linux kernel, the following vulnerability has been resolved: riscv: save the SR_SUM status over switches When threads/tasks are switched we need to ensure the old execution'
Published Jul 9, 2025 · catalog updated Aug 5, 2026 · Linux Linux
Check this week
CVE-2025-38261 is not in CISA KEV. FIRST estimates a 16.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 16.00%
- Remediation
- Vendor / distro source
- Affected products
- vendor Linux Linux patch: 6.15.5
In the Linux kernel, the following vulnerability has been resolved: riscv: save the SR_SUM status over switches When threads/tasks are switched we need to ensure the old execution's SR_SUM state is saved and the new thread has the old SR_SUM state restored. The issue was seen under heavy load especially with the syz-stress tool running, with crashes as follows in schedule_tail: Unable to handle kernel access to user memory without uaccess routines at virtual address 000000002749f0d0 Oops [#1] Modules linked in: CPU: 1 PID: 4875 Comm: syz-executor.0 Not tainted 5.12.0-rc2-syzkaller-00467-g0d758
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Linux Linux patch: 6.15.5patch: 6.15.5
How to fix CVE-2025-38261
Recommended remediation
A vendor or distribution source is linked. Check that advisory for patch availability; this catalog does not invent fix status.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2025-38261 is not in CISA KEV. FIRST estimates a 16.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.
Which versions are affected?
Compare what you have installed with Linux Linux patch: 6.15.5 patch: 6.15.5. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 16.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Jul 9, 2025 · EUVD
Detected
In the Linux kernel, the following vulnerability has been resolved: riscv: save the SR_SUM status over switches When threads/tasks are switched we need to ensure the old execution's SR_SUM state is saved and the new thread has the old SR_SUM state restored. The issue was seen under heavy load especially with the syz-stress tool running, with crashes as follows in schedule_tail: Unable to handle ke
Aug 5, 2026 · EUVD
Updated
In the Linux kernel, the following vulnerability has been resolved: riscv: save the SR_SUM status over switches When threads/tasks are switched we need to ensure the old execution's SR_SUM state is saved and the new thread has the old SR_SUM state restored. The issue was seen under heavy load especially with the syz-stress tool running, with crashes as follows in schedule_tail: Unable to handle ke
Sources
- EUVDVulnerability recordEUVD-2025-20800
In the Linux kernel, the following vulnerability has been resolved: riscv: save the SR_SUM status over switches When threads/tasks are switched we need to ensure the old execution's SR_SUM state is saved and the new thread has the old SR_SUM state restored. The issue was seen und
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Aug 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.