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TI-2025-15767 Aliases CVE-2025-21815GHSA-37p3-cfcq-p2hp

mm/compaction: fix UBSAN shift-out-of-bounds warning

Priority LOW 31CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Partial Red Hat: 5 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: mm/compaction: fix UBSAN shift-out-of-bounds warning syzkaller reported a UBSAN shift-out-of-bounds warning of (1UL << order) in isolate_freepages_block(). The bogus compound_order can be any value because it is union with flags. Add back the MAX_PAGE_ORDER check to fix the warning.

Why it matters now

EPSS 0.00193 9th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.12.14, 6.13.3, 6.14Red Hat: 1 advisoryRed Hat: 5 fixed, 1 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.7 and later6.12.14, 6.13.3, 6.14Patch availableCNA
  • Linux VendorLinux Affected 6.7 and later Fixed in 6.12.14, 6.13.3, 6.14 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.7 to before 6.12.14; 6.13 to before 6.13.3VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.7 to before 6.12.14; 6.13 to before 6.13.3 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.12.14, 6.13.3, 6.14

Red Hat 1 advisory

  • RHSA-2026:1236 Released 2026-01-26 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.55.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.55.1.el10_0, kernel-64k-devel-6.12.0-55.55.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.55.1.el10_0, kernel-64k-6.12.0-55.55.1.el10_0, kernel-64k-core-6.12.0-55.55.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.55.1.el10_0, libperf-6.12.0-55.55.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.55.1.el10_0, kernel-rt-64k-6.12.0-55.55.1.el10_0, kernel-rt-64k-core-6.12.0-55.55.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.55.1.el10_0, kernel-rt-core-6.12.0-55.55.1.el10_0, kernel-rt-debug-6.12.0-55.55.1.el10_0 +11

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:1236
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:1236
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:1236
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:1236
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:1236
Not affected: 4 products
  • 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-2025-21815
  2. 2026-10-03 Alias added: GHSA-37p3-cfcq-p2hp

References

Patch 3

  • 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