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NVD / CVE Program· CNA Linux

CVE-2025-21699: gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.25% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2a40a140e11fec699e128170ccaa98b6b82cb503, 4516febe325342555bb09ca5b396fb816d655821, 4dd57d1f0e9844311c635a7fb39abce4f2ac5a61; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 2a40a140e11fec699e128170ccaa98b6b82cb503, 4516febe325342555bb09ca5b396fb816d655821, 4dd57d1f0e9844311c635a7fb39abce4f2ac5a61; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1 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: gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag Truncate an inode's address space when flipping the GFS2_DIF_JDATA flag: depending on that flag, the pages in the address space will either use buffer heads or iomap_folio_state structs, and we cannot mix the two.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 12, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 16th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 5.4.290
  • linux linux kernel5.5 and later · before 5.10.234
  • linux linux kernel5.11 and later · before 5.15.178
  • linux linux kernel5.16 and later · before 6.1.128
  • linux linux kernel6.2 and later · before 6.6.75
  • linux linux kernel6.7 and later · before 6.12.12
  • linux linux kernel6.13

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

    • 5.10affected
    • 2164f9b9186962ffb7c687e18ec6f5255525f09d and later · before 8c41abc11aa8438c9ed2d973f97e66674c0355dfaffected · git
    • 2164f9b9186962ffb7c687e18ec6f5255525f09d and later · before 4e3ded34f3f3c9d7ed2aac7be8cf51153646574aaffected · git
    • 2164f9b9186962ffb7c687e18ec6f5255525f09d and later · before 2a40a140e11fec699e128170ccaa98b6b82cb503affected · git
    • 2164f9b9186962ffb7c687e18ec6f5255525f09d and later · before 4dd57d1f0e9844311c635a7fb39abce4f2ac5a61affected · git
    • 2164f9b9186962ffb7c687e18ec6f5255525f09d and later · before 4516febe325342555bb09ca5b396fb816d655821affected · git
    • 2164f9b9186962ffb7c687e18ec6f5255525f09d and later · before 5bb1fd0855bb0abc7d97e44758d6ffed7882d2d0affected · git
    • 2164f9b9186962ffb7c687e18ec6f5255525f09d and later · before 7c9d9223802fbed4dee1ae301661bf346964c9d2affected · git
    • before 5.10not affected · semver
    • 5.10.234 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.128-16.1.128-1
Debian:13linuxbefore 6.12.12-16.12.12-1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-64kbbefore 5.3.18-150300.59.198.15.3.18-150300.59.198.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-default-basebefore 5.3.18-150300.59.198.1.150300.18.118.15.3.18-150300.59.198.1.150300.18.118.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-docsbefore 5.3.18-150300.59.198.15.3.18-150300.59.198.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-obs-buildbefore 5.3.18-150300.59.198.15.3.18-150300.59.198.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-preemptbefore 5.3.18-150300.59.198.15.3.18-150300.59.198.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-sourcebefore 5.3.18-150300.59.198.15.3.18-150300.59.198.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-symsbefore 5.3.18-150300.59.198.15.3.18-150300.59.198.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-64kbbefore 5.14.21-150400.24.153.15.14.21-150400.24.153.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-docsbefore 5.14.21-150400.24.153.15.14.21-150400.24.153.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-obs-buildbefore 5.14.21-150400.24.153.15.14.21-150400.24.153.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-sourcebefore 5.14.21-150400.24.153.15.14.21-150400.24.153.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-symsbefore 5.14.21-150400.24.153.15.14.21-150400.24.153.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-64kbbefore 5.14.21-150500.55.97.15.14.21-150500.55.97.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-docsbefore 5.14.21-150500.55.97.15.14.21-150500.55.97.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-obs-buildbefore 5.14.21-150500.55.97.15.14.21-150500.55.97.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-symsbefore 5.14.21-150500.55.97.15.14.21-150500.55.97.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-defaultbefore 5.3.18-150300.59.198.15.3.18-150300.59.198.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_55before 1-150300.7.3.11-150300.7.3.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_37before 1-150400.9.3.11-150400.9.3.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_24before 1-150500.11.3.11-150500.11.3.1
SUSE:Linux Enterprise Micro 5.3kernel-defaultbefore 5.14.21-150400.24.153.15.14.21-150400.24.153.1
SUSE:Linux Enterprise Micro 5.3kernel-default-basebefore 5.14.21-150400.24.153.1.150400.24.76.15.14.21-150400.24.153.1.150400.24.76.1

+10

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-21695Feb 12, 2025 · platform/x86: dell-uart-backlight: fix serdev race
    18Monitor
  • ← EarlierCVE-2025-21697Feb 12, 2025 · drm/v3d: Ensure job pointer is set to NULL after job completion
    22Monitor
  • Later →CVE-2024-57951Feb 12, 2025 · hrtimers: Handle CPU state correctly on hotplug
    31Monitor

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 Linux2a40a140e11fec699e128170ccaa98b6b82cb503Vendor (CNA)
Linux Linux4516febe325342555bb09ca5b396fb816d655821Vendor (CNA)
Linux Linux4dd57d1f0e9844311c635a7fb39abce4f2ac5a61Vendor (CNA)
Linux Linux4e3ded34f3f3c9d7ed2aac7be8cf51153646574aVendor (CNA)
Linux Linux5bb1fd0855bb0abc7d97e44758d6ffed7882d2d0Vendor (CNA)
Linux Linux7c9d9223802fbed4dee1ae301661bf346964c9d2Vendor (CNA)
Linux Linux8c41abc11aa8438c9ed2d973f97e66674c0355dfVendor (CNA)
azl3 kernel 6.6.64.2-9 on Azure Linux 3.06.6.76.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.76.1-1 on Azure Linux 3.06.6.76.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.128-1 · Debian:12Package registry (OSV)
suse:kernel-64kb5.14.21-150500.55.97.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-default5.14.21-150500.55.97.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-default-base5.14.21-150500.55.97.1.150500.6.45.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-docs5.14.21-150500.55.97.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP4_Update_371-150400.9.3.1 · SUSE:Linux Enterprise Live Patching 15 SP4Package registry (OSV)
suse:kernel-livepatch-SLE15-SP5_Update_241-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5Package registry (OSV)
suse:kernel-obs-build5.14.21-150500.55.97.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-rt5.14.21-150500.13.88.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-source5.14.21-150500.55.97.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-source-rt5.14.21-150500.13.88.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-syms5.14.21-150500.55.97.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-zfcpdump5.14.21-150500.55.97.1 · SUSE:Linux Enterprise Server 15 SP5-LTSSPackage 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.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

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

All records