TI-2026-75634 Aliases CVE-2026-98506 GHSA-rgpg-w634-4pfv

Linux kernel hugetlb dissolves gigantic pages without runtime support

LOW 22Published 2026-10-18 · Updated 2026-10-19

Key facts

Attack vector: —
Privileges required: —
User interaction: —
Attack complexity: —
Impact type: —
Confidentiality · integrity · availability: —
Fix status: Partial Red Hat: 5 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

The Linux kernel hugetlb code is affected from 5.13, with fixes in 6.12.112, 6.18.55, 7.2.9 and 7.3. The function dissolve_free_hugetlb_folio() does not check for gigantic pages without runtime support, so it frees a folio that is still on the free list. If vmemmap restore fails, the rollback corrupts that free list.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not dissolve gigantic pages without runtime support dissolve_free_hugetlb_folio() doesn't check hstate_is_gigantic_no_runtime(h) though remove_hugetlb_folio()/ update_and_free_hugetlb_folio() silently bail for such folios, so it frees a still-listed folio and, on vmemmap restore failure, the add_hugetlb_folio() rollback corrupts the free list.

Why it matters now

EPSS 0.002 9th percentileScored 2026-11-07

Fix Partial Linux (Linux): 6.12.112, 6.18.55, 7.2.9 +1Red Hat: 5 without a fix

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	5.13 and later	6.12.112, 6.18.55, 7.2.9, 7.3	Patch available	CNA

Linux VendorLinux Affected 5.13 and later Fixed in 6.12.112, 6.18.55, 7.2.9, 7.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	—	—	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

Update the Linux kernel to 6.12.112, 6.18.55, 7.2.9 or 7.3 for the matching release line. The sources list no fixed version for Red Hat Enterprise Linux 10 and 9, Red Hat OpenShift Container Platform 4 and Red Hat OpenShift Container Platform 5. Red Hat plans no fix for Red Hat Enterprise Linux 6.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Fix · CNA Linux (Linux) Fixed in 6.12.112, 6.18.55, 7.2.9, 7.3

Vendor assessments

Red Hat

Red Hat rating: Moderate. 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 9	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 4	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 5	Affected	No fix yet: Fix deferred

Not affected: 3 products

Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat OpenShift Container Platform 4

Timeline

2026-10-18 Threatist record created from CVE-2026-98506
2026-10-18 Alias added: GHSA-rgpg-w634-4pfv
2026-10-19 Fix available: Linux/[email protected] · CNA
2026-10-20 Affected versions changed · Red Hat
2026-10-20 CVSS score added · Red Hat
2026-10-30 Affected versions changed · Red Hat

References

Other 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-2021-02452 Incorrect authorization in Ubuntu linux kernel 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

See all 21741 →

Sources

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