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NVD / CVE Program· CNA Linux

CVE-2025-68292: mm/memfd: fix information leak in hugetlb folios

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 50b4c1c28733a536d637d2f0401d60bcfef60ef2, b09d7c4dc642849d9a96753233c6d00364017fd6, de8798965fd0d9a6c47fc2ac57767ec32de12b49.

Low priority for now. Upgrade to Linux Linux 50b4c1c28733a536d637d2f0401d60bcfef60ef2, b09d7c4dc642849d9a96753233c6d00364017fd6, de8798965fd0d9a6c47fc2ac57767ec32de12b49 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: mm/memfd: fix information leak in hugetlb folios When allocating hugetlb folios for memfd, three initialization steps are missing: 1. Folios are not zeroed, leading to kernel memory disclosure to userspace 2. Folios are not marked uptodate before adding to page cache 3. hugetlb_fault_mutex is not taken before hugetlb_add_to_page_cache() The memfd allocation path bypasses the normal page fault handler (hugetlb_no_page) which would handle all of these initialization steps. This is problematic especially for udmabuf use cases where folios are pinned and directly accessed by userspace via DMA. Fix by matching the initialization pattern used in hugetlb_no_page(): - Zero the folio using folio_zero_user() which is optimized for huge pages - Mark it uptodate with folio_mark_uptodate() - Take hugetlb_fault_mutex before adding to page cache to prevent races The folio_zero_user() change also fixes a potential security issue where uninitialized kernel memory could be disclosed to userspace through read() or mmap() operations on the memfd.

Published
Dec 16, 2025
Updated
Oct 14, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.11affected
    • 89c1905d9c140372b7f50ef48f42378cf85d9bc5 and later · before 50b4c1c28733a536d637d2f0401d60bcfef60ef2affected · git
    • 89c1905d9c140372b7f50ef48f42378cf85d9bc5 and later · before b09d7c4dc642849d9a96753233c6d00364017fd6affected · git
    • 89c1905d9c140372b7f50ef48f42378cf85d9bc5 and later · before de8798965fd0d9a6c47fc2ac57767ec32de12b49affected · git
    • before 6.11not affected · semver
    • 6.12.61 and later · up to and including 6.12.*not affected · semver
    • 6.17.11 and later · up to and including 6.17.*not affected · semver
    • 6.18 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.63-16.12.63-1
Debian:14linuxbefore 6.17.11-16.17.11-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.27.1.160000.2.86.12.0-160000.27.1.160000.2.8
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.27.16.12.0-160000.27.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Enterprise Server 16.0kernel-azurebefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Enterprise Server 16.0kernel-docsbefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Enterprise Server 16.0kernel-kvmsmallbefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Enterprise Server 16.0kernel-obs-qabefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Enterprise Server 16.0kernel-zfcpdumpbefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Micro 6.2kernel-defaultbefore 6.12.0-160000.27.16.12.0-160000.27.1
SUSE:Linux Micro 6.2kernel-default-basebefore 6.12.0-160000.27.1.160000.2.86.12.0-160000.27.1.160000.2.8
SUSE:Linux Micro 6.2kernel-rtbefore 6.12.0-160000.27.16.12.0-160000.27.1

+3

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-68290Dec 16, 2025 · most: usb: fix double free on late probe failure
    0Monitor
  • ← EarlierCVE-2025-68291Dec 16, 2025 · mptcp: Initialise rcv_mss before calling tcp_send_active_reset() in mptcp_do_fastclose().
    0Monitor
  • Later →CVE-2025-68293Dec 16, 2025 · mm/huge_memory: fix NULL pointer deference when splitting folio
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux50b4c1c28733a536d637d2f0401d60bcfef60ef2Vendor (CNA)
Linux Linuxb09d7c4dc642849d9a96753233c6d00364017fd6Vendor (CNA)
Linux Linuxde8798965fd0d9a6c47fc2ac57767ec32de12b49Vendor (CNA)
debian:linux6.12.63-1 · Debian:13Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.27.1.160000.2.8 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.27.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:kernel-64kb6.12.0-160000.27.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-azure6.12.0-160000.27.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-default6.12.0-160000.27.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default-base6.12.0-160000.27.1.160000.2.8 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-docs6.12.0-160000.27.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-kvmsmall6.12.0-160000.27.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.27.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-obs-qa6.12.0-160000.27.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-rt6.12.0-160000.27.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-source6.12.0-160000.27.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-syms6.12.0-160000.27.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-zfcpdump6.12.0-160000.27.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records