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Fencer Vulns
high 7.8

CVE-2025-38109 json

net/mlx5: Fix ECVF vports unload on shutdown flow

published 2025-07-03 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-19834

cvss
7.8
version 3.1, NVD
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:

net/mlx5: Fix ECVF vports unload on shutdown flow

Fix shutdown flow UAF when a virtual function is created on the embedded chip (ECVF) of a BlueField device. In such case the vport acl ingress table is not properly destroyed.

ECVF functionality is independent of ecpf_vport_exists capability and thus functions mlx5_eswitch_(enable|disable)_pf_vf_vports() should not test it when enabling/disabling ECVF vports.

kernel log: [] refcount_t: underflow; use-after-free. [] WARNING: CPU: 3 PID: 1 at lib/refcount.c:28 refcount_warn_saturate+0x124/0x220 ---------------- [] Call trace: [] refcount_warn_saturate+0x124/0x220 [] tree_put_node+0x164/0x1e0 [mlx5_core] [] mlx5_destroy_flow_table+0x98/0x2c0 [mlx5_core] [] esw_acl_ingress_table_destroy+0x28/0x40 [mlx5_core] [] esw_acl_ingress_lgcy_cleanup+0x80/0xf4 [mlx5_core] [] esw_legacy_vport_acl_cleanup+0x44/0x60 [mlx5_core] [] esw_vport_cleanup+0x64/0x90 [mlx5_core] [] mlx5_esw_vport_disable+0xc0/0x1d0 [mlx5_core] [] mlx5_eswitch_unload_ec_vf_vports+0xcc/0x150 [mlx5_core] [] mlx5_eswitch_disable_sriov+0x198/0x2a0 [mlx5_core] [] mlx5_device_disable_sriov+0xb8/0x1e0 [mlx5_core] [] mlx5_sriov_detach+0x40/0x50 [mlx5_core] [] mlx5_unload+0x40/0xc4 [mlx5_core] [] mlx5_unload_one_devl_locked+0x6c/0xe4 [mlx5_core] [] mlx5_unload_one+0x3c/0x60 [mlx5_core] [] shutdown+0x7c/0xa4 [mlx5_core] [] pci_device_shutdown+0x3c/0xa0 [] device_shutdown+0x170/0x340 [] __do_sys_reboot+0x1f4/0x2a0 [] __arm64_sys_reboot+0x2c/0x40 [] invoke_syscall+0x78/0x100 [] el0_svc_common.constprop.0+0x54/0x184 [] do_el0_svc+0x30/0xac [] el0_svc+0x48/0x160 [] el0t_64_sync_handler+0xa4/0x12c [] el0t_64_sync+0x1a4/0x1a8 [] --[ end trace 9c4601d68c70030e ]---

Patch / fix

  • Linux Linux 6.6.94, 6.12.34, 6.15.3, 6.16
  • linux Debian 14, Debian 13 6.12.35-1

debian advisories DEBIAN-CVE-2025-38109

  • linux Ubuntu 24.04 LTS 6.8.0-100.100
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1046.49
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1047.50
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1043.48
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1044.44
  • linux-azure Ubuntu 24.04 LTS 6.8.0-1046.52
  • linux-gkeop Ubuntu 24.04 LTS 6.8.0-1030.33
  • linux-raspi Ubuntu 24.04 LTS 6.8.0-1047.51

ubuntu advisories UBUNTU-CVE-2025-38109

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 6.12.0-124.49.1.el10_1
  • rv RHEL 10.1 6.12.0-124.49.1.el10_1
  • perf RHEL 10.1 6.12.0-124.49.1.el10_1
  • rtla RHEL 10.1 6.12.0-124.49.1.el10_1
  • libperf RHEL 10.1 6.12.0-124.49.1.el10_1
  • kernel-rt RHEL 10.1 6.12.0-124.49.1.el10_1
  • kernel-64k RHEL 10.1 6.12.0-124.49.1.el10_1
  • kernel-core RHEL 10.1 6.12.0-124.49.1.el10_1

red hat advisories RHSA-2026:6632RHSA-2026:6570

  • kernel-rt Linux Micro 6.2 6.12.0-160000.6.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.6.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1.160000.2.4
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-obs-qa SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1

suse advisories SUSE-SU-2025:21074-1SUSE-SU-2025:21139-1SUSE-SU-2026:20560-1SUSE-SU-2025:21179-1SUSE-SU-2025:03419-1SUSE-SU-2025:03418-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.6.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall openSUSE Leap 16.0 6.12.0-160000.6.1

opensuse advisories openSUSE-SU-2025:20081-1

  • kernel AlmaLinux 9 5.14.0-611.47.1.el9_7
  • rv AlmaLinux 9 5.14.0-611.47.1.el9_7
  • perf AlmaLinux 9 5.14.0-611.47.1.el9_7
  • rtla AlmaLinux 9 5.14.0-611.47.1.el9_7
  • libperf AlmaLinux 9 5.14.0-611.47.1.el9_7
  • kernel-rt AlmaLinux 9 5.14.0-611.47.1.el9_7
  • kernel-64k AlmaLinux 9 5.14.0-611.47.1.el9_7
  • kernel-core AlmaLinux 9 5.14.0-611.47.1.el9_7

almalinux advisories ALSA-2026:6570ALSA-2026:6632

  • kernel Rocky Linux 10 6.12.0-124.49.1.el10_1
  • kernel Rocky Linux 9 5.14.0-611.47.1.el9_7

rocky linux advisories RLSA-2026:6632RLSA-2026:6570

  • kernel Azure Linux 3.0 6.6.96.1-1

azure linux advisories AZL-64517

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2025-38109 updated cvss 7.3

kernel: Linux kernel (net/mlx5): Use-after-free in ECVF vports unload leads to denial of service

  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.47.1.el9_7, perf 5.14.0-611.47.1.el9_7, rtla 5.14.0-611.47.1.el9_7, python3-perf 5.14.0-611.47.1.el9_7, kernel-devel-matched 5.14.0-611.47.1.el9_7, kernel-64k-devel-matched 5.14.0-611.47.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.49.1.el10_1, perf 6.12.0-124.49.1.el10_1, rtla 6.12.0-124.49.1.el10_1, python3-perf 6.12.0-124.49.1.el10_1, kernel-devel-matched 6.12.0-124.49.1.el10_1, kernel-64k-devel-matched 6.12.0-124.49.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.47.1.el9_7, kernel-64k 5.14.0-611.47.1.el9_7, kernel-core 5.14.0-611.47.1.el9_7, kernel-tools 5.14.0-611.47.1.el9_7, kernel-modules 5.14.0-611.47.1.el9_7, kernel-64k-core 5.14.0-611.47.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.49.1.el10_1, kernel-64k 6.12.0-124.49.1.el10_1, kernel-core 6.12.0-124.49.1.el10_1, kernel-tools 6.12.0-124.49.1.el10_1, kernel-modules 6.12.0-124.49.1.el10_1, kernel-64k-core 6.12.0-124.49.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.47.1.el9_7
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.49.1.el10_1
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.47.1.el9_7, kernel-rt-64k 5.14.0-611.47.1.el9_7, kernel-rt-core 5.14.0-611.47.1.el9_7, kernel-rt-modules 5.14.0-611.47.1.el9_7, kernel-rt-64k-core 5.14.0-611.47.1.el9_7, kernel-rt-debug-core 5.14.0-611.47.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.49.1.el10_1, kernel-rt-64k 6.12.0-124.49.1.el10_1, kernel-rt-core 6.12.0-124.49.1.el10_1, kernel-rt-modules 6.12.0-124.49.1.el10_1, kernel-rt-64k-core 6.12.0-124.49.1.el10_1, kernel-rt-debug-core 6.12.0-124.49.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:6632
show 3 more
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.47.1.el9_7, kernel-rt-core 5.14.0-611.47.1.el9_7, kernel-rt-modules 5.14.0-611.47.1.el9_7, kernel-rt-debug-core 5.14.0-611.47.1.el9_7, kernel-rt-modules-core 5.14.0-611.47.1.el9_7, kernel-rt-debug-modules 5.14.0-611.47.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.49.1.el10_1, kernel-rt-core 6.12.0-124.49.1.el10_1, kernel-rt-modules 6.12.0-124.49.1.el10_1, kernel-rt-debug-core 6.12.0-124.49.1.el10_1, kernel-rt-modules-core 6.12.0-124.49.1.el10_1, kernel-rt-debug-modules 6.12.0-124.49.1.el10_1, +4 more
    fixed: vendor fix RHSA-2026:6632
  • 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 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
    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

0.20% 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
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.