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TI-2025-25860 Aliases CVE-2025-38522GHSA-8mqg-35g3-7pvm

sched/ext: Prevent update_locked_rq() calls with NULL rq

Priority LOW 24CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

In the Linux kernel, the following vulnerability has been resolved: sched/ext: Prevent update_locked_rq() calls with NULL rq Avoid invoking update_locked_rq() when the runqueue (rq) pointer is NULL in the SCX_CALL_OP and SCX_CALL_OP_RET macros. Previously, calling update_locked_rq(NULL) with preemption enabled could trigger the following warning: BUG: using __this_cpu_write() in preemptible [00000000] This happens because __this_cpu_write() is unsafe to use in preemptible context. rq is NULL when an ops invoked from an unlocked context. In such cases, we don't need to store any rq, since the value should already be NULL (unlocked). Ensure that update_locked_rq() is only called when rq is non-NULL, preventing calling __this_cpu_write() on preemptible context.

Why it matters now

EPSS 0.00148 4th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 6.15.8, 6.16

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.15 and later6.15.8, 6.16Patch availableCNA
  • Linux VendorLinux Affected 6.15 and later Fixed in 6.15.8, 6.16 Patch available CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.15.1 to before 6.15.8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.15:-:*:*:*:*:*:*6.15VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:*6.15 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*6.16 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*6.16 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*6.16 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*6.16 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*6.16 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*6.16 rc6VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.15.1 to before 6.15.8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.15:-:*:*:*:*:*:* Versions 6.15 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:* Versions 6.15 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:* Versions 6.16 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:* Versions 6.16 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:* Versions 6.16 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:* Versions 6.16 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:* Versions 6.16 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:* Versions 6.16 rc6 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.15.8, 6.16

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-38522
  2. 2026-10-03 Alias added: GHSA-8mqg-35g3-7pvm

References

Patch 2

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences