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Fencer Vulns
high 7.8

CVE-2025-38206 json

exfat: fix double free in delayed_free

published 2025-07-04 16 mo ago modified 2026-09-02 2 mo ago also EUVD-2025-20050

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

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.

Patch / fix

  • Linux Linux 5.10.239, 5.15.186, 6.1.187, 6.6.156, 6.12.108, 6.15.4, 6.16
  • linux Debian 12 6.1.187-1
  • linux Debian 13 6.12.111-1
  • linux Debian 14 6.16.3-1
  • linux-6.12 Debian 12 6.12.111-1~deb12u1

debian advisories DEBIAN-CVE-2025-38206

  • linux Ubuntu 22.04 LTS 5.15.0-156.166
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1092.99
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1092.101
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1089.95
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1086.89
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1088.93
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1096.105
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1075.83

ubuntu advisories UBUNTU-CVE-2025-38206

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 10.1 6.12.0-124.39.1.el10_1
  • rv RHEL 10.1 6.12.0-124.39.1.el10_1
  • perf RHEL 10.1 6.12.0-124.39.1.el10_1
  • rtla RHEL 10.1 6.12.0-124.39.1.el10_1
  • libperf RHEL 10.1 6.12.0-124.39.1.el10_1
  • kernel-rt RHEL 10.1 6.12.0-124.39.1.el10_1
  • kernel-64k RHEL 10.1 6.12.0-124.39.1.el10_1
  • kernel-core RHEL 10.1 6.12.0-124.39.1.el10_1

red hat advisories RHSA-2026:7100RHSA-2026:7013RHSA-2026:6986RHSA-2026:6948RHSA-2026:4745RHSA-2026:4246

  • kernel-livepatch-MICRO-6-0-RT_Update_3 Linux Micro 6.0 14-1.2
  • kernel-livepatch-MICRO-6-0-RT_Update_2 Linux Micro 6.1, Linux Micro 6.0 14-1.1
  • kernel-livepatch-MICRO-6-0_Update_2 Linux Micro 6.1, Linux Micro 6.0 14-1.1
  • kernel-livepatch-MICRO-6-0_Update_4 Linux Micro 6.1, Linux Micro 6.0 12-1.2
  • kernel-livepatch-MICRO-6-0_Update_6 Linux Micro 6.1, Linux Micro 6.0 8-3.1
  • kernel-livepatch-MICRO-6-0_Update_9 Linux Micro 6.1, Linux Micro 6.0 7-1.2
  • kernel-livepatch-MICRO-6-0_Update_8 Linux Micro 6.1, Linux Micro 6.0 7-1.2
  • kernel-livepatch-MICRO-6-0_Update_5 Linux Micro 6.1, Linux Micro 6.0 10-1.2

suse advisories SUSE-SU-2025:20891-1SUSE-SU-2025:20890-1SUSE-SU-2025:20920-1SUSE-SU-2025:20886-1SUSE-SU-2025:20909-1SUSE-SU-2025:20885-1

  • kernel-abi-stablelists AlmaLinux 10 6.12.0-124.39.1.el10_1
  • kernel AlmaLinux 9 5.14.0-611.35.1.el9_7
  • rv AlmaLinux 9 5.14.0-611.35.1.el9_7
  • perf AlmaLinux 9 5.14.0-611.35.1.el9_7
  • rtla AlmaLinux 9 5.14.0-611.35.1.el9_7
  • libperf AlmaLinux 9 5.14.0-611.35.1.el9_7
  • kernel-rt AlmaLinux 9 5.14.0-611.35.1.el9_7
  • kernel-64k AlmaLinux 9 5.14.0-611.35.1.el9_7

almalinux advisories ALSA-2026:3275ALSA-2026:3066

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-38206 updated cvss 7.3

kernel: Kernel: Double free vulnerability in exFAT filesystem can lead to denial of service

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.114.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.114.1.el9_4
    fixed: vendor fix RHSA-2026:4246
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.98.1.el9_6
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.35.1.el9_7, perf 5.14.0-611.35.1.el9_7, rtla 5.14.0-611.35.1.el9_7, python3-perf 5.14.0-611.35.1.el9_7, kernel-devel-matched 5.14.0-611.35.1.el9_7, kernel-64k-devel-matched 5.14.0-611.35.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:3066
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.39.1.el10_1, perf 6.12.0-124.39.1.el10_1, rtla 6.12.0-124.39.1.el10_1, python3-perf 6.12.0-124.39.1.el10_1, kernel-devel-matched 6.12.0-124.39.1.el10_1, kernel-64k-devel-matched 6.12.0-124.39.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:3275
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.173.1.el9_0, kernel-devel-matched 5.14.0-70.173.1.el9_0, kernel-debug-devel-matched 5.14.0-70.173.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.173.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.173.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.173.1.el9_0, +2 more
    fixed: vendor fix RHSA-2026:7013
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.164.1.el9_2, rtla 5.14.0-284.164.1.el9_2, kernel-devel-matched 5.14.0-284.164.1.el9_2, kernel-64k-devel-matched 5.14.0-284.164.1.el9_2, kernel-debug-devel-matched 5.14.0-284.164.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.164.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:6986
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.114.1.el9_4, perf 5.14.0-427.114.1.el9_4, rtla 5.14.0-427.114.1.el9_4, kernel-devel-matched 5.14.0-427.114.1.el9_4, kernel-64k-devel-matched 5.14.0-427.114.1.el9_4, kernel-debug-devel-matched 5.14.0-427.114.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:4246
show 22 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.98.1.el9_6, perf 5.14.0-570.98.1.el9_6, rtla 5.14.0-570.98.1.el9_6, python3-perf 5.14.0-570.98.1.el9_6, kernel-devel-matched 5.14.0-570.98.1.el9_6, kernel-64k-devel-matched 5.14.0-570.98.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.35.1.el9_7, kernel-64k 5.14.0-611.35.1.el9_7, kernel-core 5.14.0-611.35.1.el9_7, kernel-tools 5.14.0-611.35.1.el9_7, kernel-modules 5.14.0-611.35.1.el9_7, kernel-64k-core 5.14.0-611.35.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:3066
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.39.1.el10_1, kernel-64k 6.12.0-124.39.1.el10_1, kernel-core 6.12.0-124.39.1.el10_1, kernel-tools 6.12.0-124.39.1.el10_1, kernel-modules 6.12.0-124.39.1.el10_1, kernel-64k-core 6.12.0-124.39.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:3275
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.173.1.el9_0, bpftool 5.14.0-70.173.1.el9_0, kernel-core 5.14.0-70.173.1.el9_0, kernel-tools 5.14.0-70.173.1.el9_0, python3-perf 5.14.0-70.173.1.el9_0, kernel-modules 5.14.0-70.173.1.el9_0, +14 more
    fixed: vendor fix RHSA-2026:7013
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.164.1.el9_2, kernel 5.14.0-284.164.1.el9_2, kernel-64k 5.14.0-284.164.1.el9_2, kernel-core 5.14.0-284.164.1.el9_2, kernel-tools 5.14.0-284.164.1.el9_2, python3-perf 5.14.0-284.164.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:6986
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.114.1.el9_4, kernel 5.14.0-427.114.1.el9_4, kernel-64k 5.14.0-427.114.1.el9_4, kernel-core 5.14.0-427.114.1.el9_4, kernel-tools 5.14.0-427.114.1.el9_4, python3-perf 5.14.0-427.114.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:4246
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.98.1.el9_6, kernel-64k 5.14.0-570.98.1.el9_6, kernel-core 5.14.0-570.98.1.el9_6, kernel-tools 5.14.0-570.98.1.el9_6, kernel-modules 5.14.0-570.98.1.el9_6, kernel-64k-core 5.14.0-570.98.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.35.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.35.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.35.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.35.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.35.1.el9_7
    fixed: vendor fix RHSA-2026:3066
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.39.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.39.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.39.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.39.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.39.1.el10_1
    fixed: vendor fix RHSA-2026:3275
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-kvm 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-core 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-modules 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-kvm 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-core 5.14.0-70.173.1.rt21.245.el9_0, +4 more
    fixed: vendor fix RHSA-2026:7100
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.35.1.el9_7, kernel-rt-64k 5.14.0-611.35.1.el9_7, kernel-rt-core 5.14.0-611.35.1.el9_7, kernel-rt-modules 5.14.0-611.35.1.el9_7, kernel-rt-64k-core 5.14.0-611.35.1.el9_7, kernel-rt-debug-core 5.14.0-611.35.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:3066
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.39.1.el10_1, kernel-rt-64k 6.12.0-124.39.1.el10_1, kernel-rt-core 6.12.0-124.39.1.el10_1, kernel-rt-modules 6.12.0-124.39.1.el10_1, kernel-rt-64k-core 6.12.0-124.39.1.el10_1, kernel-rt-debug-core 6.12.0-124.39.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:3275
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-core 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-modules 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-core 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-debug-modules 5.14.0-70.173.1.rt21.245.el9_0, kernel-rt-modules-extra 5.14.0-70.173.1.rt21.245.el9_0, +2 more
    fixed: vendor fix RHSA-2026:7100
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-modules 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-modules-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-modules 5.14.0-284.164.1.rt14.449.el9_2, +4 more
    fixed: vendor fix RHSA-2026:6948
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.114.1.el9_4, kernel-rt-core 5.14.0-427.114.1.el9_4, kernel-rt-modules 5.14.0-427.114.1.el9_4, kernel-rt-debug-core 5.14.0-427.114.1.el9_4, kernel-rt-modules-core 5.14.0-427.114.1.el9_4, kernel-rt-debug-modules 5.14.0-427.114.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:4246
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.98.1.el9_6, kernel-rt-64k 5.14.0-570.98.1.el9_6, kernel-rt-core 5.14.0-570.98.1.el9_6, kernel-rt-modules 5.14.0-570.98.1.el9_6, kernel-rt-64k-core 5.14.0-570.98.1.el9_6, kernel-rt-debug-core 5.14.0-570.98.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.35.1.el9_7, kernel-rt-core 5.14.0-611.35.1.el9_7, kernel-rt-modules 5.14.0-611.35.1.el9_7, kernel-rt-debug-core 5.14.0-611.35.1.el9_7, kernel-rt-modules-core 5.14.0-611.35.1.el9_7, kernel-rt-debug-modules 5.14.0-611.35.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:3066
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.39.1.el10_1, kernel-rt-core 6.12.0-124.39.1.el10_1, kernel-rt-modules 6.12.0-124.39.1.el10_1, kernel-rt-debug-core 6.12.0-124.39.1.el10_1, kernel-rt-modules-core 6.12.0-124.39.1.el10_1, kernel-rt-debug-modules 6.12.0-124.39.1.el10_1, +4 more
    fixed: vendor fix RHSA-2026:3275
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-kvm 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-core 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-modules 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-kvm 5.14.0-284.164.1.rt14.449.el9_2, kernel-rt-debug-core 5.14.0-284.164.1.rt14.449.el9_2, +6 more
    fixed: vendor fix RHSA-2026:6948
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.114.1.el9_4, kernel-rt-kvm 5.14.0-427.114.1.el9_4, kernel-rt-core 5.14.0-427.114.1.el9_4, kernel-rt-modules 5.14.0-427.114.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.114.1.el9_4, kernel-rt-debug-core 5.14.0-427.114.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:4246
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.98.1.el9_6, kernel-rt-kvm 5.14.0-570.98.1.el9_6, kernel-rt-core 5.14.0-570.98.1.el9_6, kernel-rt-modules 5.14.0-570.98.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.98.1.el9_6, kernel-rt-debug-core 5.14.0-570.98.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:4745
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.