TI-2025-26429 Aliases CVE-2025-39754 GHSA-fppf-vq4v-6j7g

mm/smaps: fix race between smaps_hugetlb_range and migration

LOW 21CWE-362Published 2025-09-11 · Updated 2026-11-05

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 4 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/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range().

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0014 3rd percentileScored 2026-11-07

Fix Partial Linux (Linux): 6.1.191, 6.6.160, 6.12.43 +3Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	4.4 and later	6.1.191, 6.6.160, 6.12.43, 6.15.11, 6.16.2, 6.17	Patch available	CNA

Linux VendorLinux Affected 4.4 and later Fixed in 6.1.191, 6.6.160, 6.12.43, 6.15.11, 6.16.2, 6.17 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	4.4 to before 6.12.43; 6.13 to before 6.15.11; 6.16 to before 6.16.2	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.17:rc1::::::	6.17 rc1	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.4 to before 6.12.43; 6.13 to before 6.15.11; 6.16 to before 6.16.2 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* Versions 6.17 rc1 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.43, 6.15.11, 6.16.2, 6.17

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Not affected: 1 product

Red Hat Enterprise Linux 7

Timeline

2026-10-02 Threatist record created from CVE-2025-39754
2026-10-03 Alias added: GHSA-fppf-vq4v-6j7g
2026-10-21 Fix available: Linux/[email protected], Linux/Linux@f76089018b34dbe0c2e9b67c5b7d8860668748bb · CNA
2026-10-21 1 new reference · CNA
2026-10-30 Fix available: Linux/Linux@37ee0d97298b0547cb26b6957ccfea2d356bd0e7, Linux/[email protected] · CNA
2026-10-30 1 new reference · CNA
2026-11-05 CISA SSVC decision points changed

References

Patch 4

Other 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