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Fencer Vulns
high 7.8

CVE-2026-43276 json

net: mana: Fix double destroy_workqueue on service rescan PCI path

published 2026-05-06 6 mo ago modified 2026-11-06 2 d ago also EUVD-2026-27672

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: mana: Fix double destroy_workqueue on service rescan PCI path

While testing corner cases in the driver, a use-after-free crash was found on the service rescan PCI path.

When mana_serv_reset() calls mana_gd_suspend(), mana_gd_cleanup() destroys gc->service_wq. If the subsequent mana_gd_resume() fails with -ETIMEDOUT or -EPROTO, the code falls through to mana_serv_rescan() which triggers pci_stop_and_remove_bus_device(). This invokes the PCI .remove callback (mana_gd_remove), which calls mana_gd_cleanup() a second time, attempting to destroy the already- freed workqueue. Fix this by NULL-checking gc->service_wq in mana_gd_cleanup() and setting it to NULL after destruction.

Call stack of issue for reference: [Sat Feb 21 18:53:48 2026] Call Trace: [Sat Feb 21 18:53:48 2026] <TASK> [Sat Feb 21 18:53:48 2026] mana_gd_cleanup+0x33/0x70 [mana] [Sat Feb 21 18:53:48 2026] mana_gd_remove+0x3a/0xc0 [mana] [Sat Feb 21 18:53:48 2026] pci_device_remove+0x41/0xb0 [Sat Feb 21 18:53:48 2026] device_remove+0x46/0x70 [Sat Feb 21 18:53:48 2026] device_release_driver_internal+0x1e3/0x250 [Sat Feb 21 18:53:48 2026] device_release_driver+0x12/0x20 [Sat Feb 21 18:53:48 2026] pci_stop_bus_device+0x6a/0x90 [Sat Feb 21 18:53:48 2026] pci_stop_and_remove_bus_device+0x13/0x30 [Sat Feb 21 18:53:48 2026] mana_do_service+0x180/0x290 [mana] [Sat Feb 21 18:53:48 2026] mana_serv_func+0x24/0x50 [mana] [Sat Feb 21 18:53:48 2026] process_one_work+0x190/0x3d0 [Sat Feb 21 18:53:48 2026] worker_thread+0x16e/0x2e0 [Sat Feb 21 18:53:48 2026] kthread+0xf7/0x130 [Sat Feb 21 18:53:48 2026] ? __pfx_worker_thread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ret_from_fork+0x269/0x350 [Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ret_from_fork_asm+0x1a/0x30 [Sat Feb 21 18:53:48 2026] </TASK>

Patch / fix

  • Linux Linux 6.18.16, 6.19.6, 7.0
  • linux Debian 14 6.19.6-1

debian advisories DEBIAN-CVE-2026-43276

  • linux-azure Ubuntu 25.10 6.17.0-1015.15
  • linux-azure-6.17 Ubuntu 24.04 LTS 6.17.0-1015.15~24.04.1

ubuntu advisories UBUNTU-CVE-2026-43276

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 10.2 6.12.0-211.31.1.el10_2
  • rv RHEL 10.2 6.12.0-211.31.1.el10_2
  • perf RHEL 10.2 6.12.0-211.31.1.el10_2
  • rtla RHEL 10.2 6.12.0-211.31.1.el10_2
  • libperf RHEL 10.2 6.12.0-211.31.1.el10_2
  • kernel-rt RHEL 10.2 6.12.0-211.31.1.el10_2
  • kernel-64k RHEL 10.2 6.12.0-211.31.1.el10_2
  • kernel-core RHEL 10.2 6.12.0-211.31.1.el10_2

red hat advisories RHSA-2026:36541RHSA-2026:36018

  • kernel-default SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Live Patching 15 SP6 +1 more 6.4.0-150600.23.130.1
  • kernel-64kb SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS 5.14.21-150500.55.182.1
  • kernel-syms SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.182.1
  • kernel-source SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.182.1
  • kernel-default SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 5.14.21-150500.55.182.1
  • kernel-obs-build SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.182.1
  • kernel-default-base SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.182.1.150500.6.85.2
  • kernel-rt Real Time Module 15 SP7 6.4.0-150700.7.72.1

suse advisories SUSE-SU-2026:3602-1SUSE-SU-2026:3595-1SUSE-SU-2026:3810-1SUSE-SU-2026:3790-1SUSE-SU-2026:23244-1SUSE-SU-2026:23241-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.37.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.37.1

opensuse advisories openSUSE-SU-2026:21555-1

  • kernel AlmaLinux 10 6.12.0-211.31.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.31.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.31.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.31.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.31.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.31.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.31.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.31.1.el10_2

almalinux advisories ALSA-2026:36541ALSA-2026:36018

  • kernel Rocky Linux 9 5.14.0-687.22.1.el9_8

rocky linux advisories RLSA-2026:36018

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-2026-43276 updated cvss 7.0

kernel: net: mana: Fix double destroy_workqueue on service rescan PCI path

  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.22.1.el9_8, perf 5.14.0-687.22.1.el9_8, rtla 5.14.0-687.22.1.el9_8, python3-perf 5.14.0-687.22.1.el9_8, kernel-devel-matched 5.14.0-687.22.1.el9_8, kernel-64k-devel-matched 5.14.0-687.22.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.31.1.el10_2, perf 6.12.0-211.31.1.el10_2, rtla 6.12.0-211.31.1.el10_2, python3-perf 6.12.0-211.31.1.el10_2, kernel-devel-matched 6.12.0-211.31.1.el10_2, kernel-64k-devel-matched 6.12.0-211.31.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:36541
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.22.1.el9_8, kernel-64k 5.14.0-687.22.1.el9_8, kernel-core 5.14.0-687.22.1.el9_8, kernel-tools 5.14.0-687.22.1.el9_8, kernel-modules 5.14.0-687.22.1.el9_8, kernel-64k-core 5.14.0-687.22.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.31.1.el10_2, kernel-64k 6.12.0-211.31.1.el10_2, kernel-core 6.12.0-211.31.1.el10_2, kernel-tools 6.12.0-211.31.1.el10_2, kernel-modules 6.12.0-211.31.1.el10_2, kernel-64k-core 6.12.0-211.31.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:36541
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.22.1.el9_8
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.31.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.31.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.31.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.31.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.31.1.el10_2
    fixed: vendor fix RHSA-2026:36541
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.22.1.el9_8, kernel-rt-64k 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-64k-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.31.1.el10_2, kernel-rt-64k 6.12.0-211.31.1.el10_2, kernel-rt-core 6.12.0-211.31.1.el10_2, kernel-rt-modules 6.12.0-211.31.1.el10_2, kernel-rt-64k-core 6.12.0-211.31.1.el10_2, kernel-rt-debug-core 6.12.0-211.31.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:36541
show 3 more
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, kernel-rt-modules-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-modules 5.14.0-687.22.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.31.1.el10_2, kernel-rt-core 6.12.0-211.31.1.el10_2, kernel-rt-modules 6.12.0-211.31.1.el10_2, kernel-rt-debug-core 6.12.0-211.31.1.el10_2, kernel-rt-modules-core 6.12.0-211.31.1.el10_2, kernel-rt-debug-modules 6.12.0-211.31.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:36541
  • 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
partial
Assessed
3 d ago

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 1% 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.