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NVD / CVE Program· CNA Linux

CVE-2025-38206: exfat: fix double free in delayed_free

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.19% (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 13d8de1b6568dcc31a95534ced16bc0c9a67bc15, 1f3d9724e16d62c7d42c67d6613b8512f2887c22, 29abaf93357f4a7d083cf399d4306999e20db31d.

Low priority for now. Upgrade to Linux Linux 13d8de1b6568dcc31a95534ced16bc0c9a67bc15, 1f3d9724e16d62c7d42c67d6613b8512f2887c22, 29abaf93357f4a7d083cf399d4306999e20db31d 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: exfat: fix double free in delayed_free The double free could happen in the following path. exfat_create_upcase_table() exfat_create_upcase_table() : return error exfat_free_upcase_table() : free ->vol_utbl exfat_load_default_upcase_table : return error exfat_kill_sb() delayed_free() exfat_free_upcase_table() <--------- double free This patch set ->vol_util as NULL after freeing it.

Published
Jul 4, 2025
Updated
Sep 2, 2026
EPSS
0.1% · 9th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

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

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Follow CVE-2025-38206

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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

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

    • 5.7affected
    • 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and later · before 13d8de1b6568dcc31a95534ced16bc0c9a67bc15affected · git
    • 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and later · before 66e84439ec2af776ce749e8540f8fdd257774152affected · git
    • 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and later · before ea27703eb0efbadcd45b9949526160ed90536a72affected · git
    • 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and later · before ac65f76db9b2ff3fbc9e198c0e9aaf81b111b7d0affected · git
    • 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and later · before 29abaf93357f4a7d083cf399d4306999e20db31daffected · git
    • 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and later · before d3cef0e7a5c1aa6217c51faa9ce8ecac35d6e1fdaffected · git
    • 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 and later · before 1f3d9724e16d62c7d42c67d6613b8512f2887c22affected · git
    • before 5.7not affected · semver
    • 5.10.239 and later · up to and including 5.10.*not affected · semver
Affected versions · NVD (4)

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 kernel5.7 and later · before 5.10.239
  • linux linux kernel5.11 and later · before 5.15.186
  • linux linux kernel5.16 and later · before 6.15.4

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-124.39.1.el10_16.12.0-124.39.1.el10_1
AlmaLinux:10kernel-docbefore 6.12.0-124.39.1.el10_16.12.0-124.39.1.el10_1
AlmaLinux:9kernelbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64kbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-corebefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-debugbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-develbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-corebefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-cross-headersbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-debugbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-debug-corebefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-debug-develbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-611.35.1.el9_75.14.0-611.35.1.el9_7

+96

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-2025-38203Jul 4, 2025 · jfs: Fix null-ptr-deref in jfs_ioc_trim
    22Monitor
  • ← EarlierCVE-2025-38205Jul 4, 2025 · drm/amd/display: Avoid divide by zero by initializing dummy pitch to 1
    22Monitor
  • Later →CVE-2025-38211Jul 4, 2025 · RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction
    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 Linux13d8de1b6568dcc31a95534ced16bc0c9a67bc15Vendor (CNA)
Linux Linux1f3d9724e16d62c7d42c67d6613b8512f2887c22Vendor (CNA)
Linux Linux29abaf93357f4a7d083cf399d4306999e20db31dVendor (CNA)
Linux Linux66e84439ec2af776ce749e8540f8fdd257774152Vendor (CNA)
Linux Linuxac65f76db9b2ff3fbc9e198c0e9aaf81b111b7d0Vendor (CNA)
Linux Linuxd3cef0e7a5c1aa6217c51faa9ce8ecac35d6e1fdVendor (CNA)
Linux Linuxea27703eb0efbadcd45b9949526160ed90536a72Vendor (CNA)
almalinux:kernel5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-611.35.1.el9_7 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-611.35.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+15

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.

Variant candidates

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

  • CVE-2026-31608294 days apartsmb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()
    39Monitor
  • CVE-2026-31609294 days apartsmb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
    39Monitor
  • CVE-2026-43011301 days apartnet/x25: Fix potential double free of skb
    39Monitor
  • CVE-2026-43414308 days apartscsi: qla2xxx: Completely fix fcport double free
    39Monitor
  • CVE-2026-52993355 days aparttipc: fix double-free in tipc_buf_append()
    39Monitor
  • CVE-2026-63888380 days apartscsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()
    39Monitor

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

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

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

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

References

Show all references (7 more)

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

All records