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NVD / CVE Program· CNA Linux

CVE-2025-38451: md/md-bitmap: fix GPF in bitmap_get_stats()

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: 0.17% (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 3d82a729530bd2110ba66e4a1f73461c776edec2, 3e0542701b37aa25b025d8531583458e4f014c2e, 6.1.146.

Low priority for now. Upgrade to Linux Linux 3d82a729530bd2110ba66e4a1f73461c776edec2, 3e0542701b37aa25b025d8531583458e4f014c2e, 6.1.146 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: md/md-bitmap: fix GPF in bitmap_get_stats() The commit message of commit 6ec1f0239485 ("md/md-bitmap: fix stats collection for external bitmaps") states: Remove the external bitmap check as the statistics should be available regardless of bitmap storage location. Return -EINVAL only for invalid bitmap with no storage (neither in superblock nor in external file). But, the code does not adhere to the above, as it does only check for a valid super-block for "internal" bitmaps. Hence, we observe: Oops: GPF, probably for non-canonical address 0x1cd66f1f40000028 RIP: 0010:bitmap_get_stats+0x45/0xd0 Call Trace: seq_read_iter+0x2b9/0x46a seq_read+0x12f/0x180 proc_reg_read+0x57/0xb0 vfs_read+0xf6/0x380 ksys_read+0x6d/0xf0 do_syscall_64+0x8c/0x1b0 entry_SYSCALL_64_after_hwframe+0x76/0x7e We fix this by checking the existence of a super-block for both the internal and external case.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 25, 2025
Updated
Oct 15, 2026
EPSS
0.1% · 7th 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 · 0.1%

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

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel6.6.88 and later · before 6.6.99
  • linux linux kernel6.12.25 and later · before 6.12.39
  • linux linux kernel6.14.4 and later · before 6.15
  • linux linux kernel6.1.135 and later · before 6.1.146
  • linux linux kernel6.15.1 and later · before 6.15.7
  • linux linux kernel6.15
  • linux linux kernel6.16

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

    • 896a6fbefc9050cf940ed57947eda6dc23aa58b0, 6.15affected
    • 065f4b1cd41d03702426af44193894b925607073 and later · before a23b16ba3274961494f5ad236345d238364349ffaffected · git
    • 0b5390aeaa85eb2f15e0e2ea0731c0995285db5e and later · before 3d82a729530bd2110ba66e4a1f73461c776edec2affected · git
    • eeeba7f43ae27835718a5f5ad6552a8983e75201 and later · before 3e0542701b37aa25b025d8531583458e4f014c2eaffected · git
    • 6ec1f0239485028445d213d91cfee5242f3211ba and later · before a18f9b08c70e10ea3a897058fee8a4f3b4c146ecaffected · git
    • 6ec1f0239485028445d213d91cfee5242f3211ba and later · before c17fb542dbd1db745c9feac15617056506dd7195affected · git
    • 6.1.135 and later · before 6.1.146affected · semver
    • 6.6.88 and later · before 6.6.99affected · semver
    • 6.12.25 and later · before 6.12.39affected · semver
    • 6.14.4 and later · before 6.15affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.147-16.1.147-1
Debian:13linuxbefore 6.12.41-16.12.41-1
Debian:14linuxbefore 6.16.3-16.16.3-1

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-2025-38448Jul 25, 2025 · usb: gadget: u_serial: Fix race condition in TTY wakeup
    18Monitor
  • ← EarlierCVE-2025-38450Jul 25, 2025 · wifi: mt76: mt7925: prevent NULL pointer dereference in mt7925_sta_set_decap_offload()
    22Monitor
  • Later →CVE-2025-38452Jul 25, 2025 · net: ethernet: rtsn: Fix a null pointer dereference in rtsn_probe()
    22Monitor

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 Linux3d82a729530bd2110ba66e4a1f73461c776edec2Vendor (CNA)
Linux Linux3e0542701b37aa25b025d8531583458e4f014c2eVendor (CNA)
Linux Linux6.1.146Vendor (CNA)
Linux Linux6.12.39Vendor (CNA)
Linux Linux6.15Vendor (CNA)
Linux Linux6.6.99Vendor (CNA)
Linux Linuxa18f9b08c70e10ea3a897058fee8a4f3b4c146ecVendor (CNA)
Linux Linuxa23b16ba3274961494f5ad236345d238364349ffVendor (CNA)
Linux Linuxc17fb542dbd1db745c9feac15617056506dd7195Vendor (CNA)
debian:linux6.1.147-1 · Debian:12Package 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 (6 more)

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

All records