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TI-2025-26403 Aliases CVE-2025-39727GHSA-x952-wmpf-82wc

mm: swap: fix potential buffer overflow in setup_clusters()

Priority LOW 33CWE-120Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: mm: swap: fix potential buffer overflow in setup_clusters() In setup_swap_map(), we only ensure badpages are in range (0, last_page]. As maxpages might be < last_page, setup_clusters() will encounter a buffer overflow when a badpage is >= maxpages. Only call inc_cluster_info_page() for badpage which is < maxpages to fix the issue.

Why it matters now

EPSS 0.00183 7th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 6.12.42, 6.15.10, 6.16.1 +1Red Hat: 2 advisories

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.12 and later6.12.42, 6.15.10, 6.16.1, 6.17Patch availableCNA
  • Linux VendorLinux Affected 6.12 and later Fixed in 6.12.42, 6.15.10, 6.16.1, 6.17 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.12 to before 6.12.42; 6.13 to before 6.15.10; 6.16 to before 6.16.1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.12 to before 6.12.42; 6.13 to before 6.15.10; 6.16 to before 6.16.1 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.12.42, 6.15.10, 6.16.1, 6.17

Red Hat 2 advisories

  • RHSA-2025:21118 Released 2025-11-12 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.9.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.9.1.el10_1, kernel-64k-devel-6.12.0-124.9.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.9.1.el10_1, kernel-64k-6.12.0-124.9.1.el10_1, kernel-64k-core-6.12.0-124.9.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.9.1.el10_1, libperf-6.12.0-124.9.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.9.1.el10_1, kernel-rt-64k-6.12.0-124.9.1.el10_1, kernel-rt-64k-core-6.12.0-124.9.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.9.1.el10_1, kernel-rt-core-6.12.0-124.9.1.el10_1, kernel-rt-debug-6.12.0-124.9.1.el10_1 +9
  • RHSA-2025:19106 Released 2025-10-27 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-55.41.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.41.1.el10_0, kernel-64k-devel-6.12.0-55.41.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-55.41.1.el10_0, kernel-64k-6.12.0-55.41.1.el10_0, kernel-64k-core-6.12.0-55.41.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-55.41.1.el10_0, libperf-6.12.0-55.41.1.el10_0
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-55.41.1.el10_0, kernel-rt-64k-6.12.0-55.41.1.el10_0, kernel-rt-64k-core-6.12.0-55.41.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-55.41.1.el10_0, kernel-rt-core-6.12.0-55.41.1.el10_0, kernel-rt-debug-6.12.0-55.41.1.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 AppStream (v. 10)Fixed RHSA-2025:19106, RHSA-2025:21118
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:19106, RHSA-2025:21118
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:19106, RHSA-2025:21118
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:19106, RHSA-2025:21118
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:19106, RHSA-2025:21118
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-2025-39727
  2. 2026-10-03 Alias added: GHSA-x952-wmpf-82wc

References

Patch 4

  • 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