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Fencer Vulns
high 7.8

CVE-2026-43056 json

net: mana: fix use-after-free in add_adev() error path

published 2026-05-01 6 mo ago modified 2026-10-19 20 d ago also EUVD-2026-26655

cvss
7.8
version 3.1, CNA
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 use-after-free in add_adev() error path

If auxiliary_device_add() fails, add_adev() jumps to add_fail and calls auxiliary_device_uninit(adev).

The auxiliary device has its release callback set to adev_release(), which frees the containing struct mana_adev. Since adev is embedded in struct mana_adev, the subsequent fall-through to init_fail and access to adev->id may result in a use-after-free.

Fix this by saving the allocated auxiliary device id in a local variable before calling auxiliary_device_add(), and use that saved id in the cleanup path after auxiliary_device_uninit().

Patch / fix

  • Linux Linux 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0
  • linux Debian 13 6.12.85-1
  • linux Debian 14 6.19.12-1

debian advisories DEBIAN-CVE-2026-43056

  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1059.67
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1061.62
  • linux-azure Ubuntu 24.04 LTS 6.8.0-1063.71
  • linux-gkeop Ubuntu 24.04 LTS 6.8.0-1046.50
  • linux-raspi Ubuntu 24.04 LTS 6.8.0-1061.65

ubuntu advisories UBUNTU-CVE-2026-43056

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 8 4.18.0-553.136.1.el8_10
  • perf RHEL 8 4.18.0-553.136.1.el8_10
  • bpftool RHEL 8 4.18.0-553.136.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.136.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.136.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.136.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.136.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.136.1.el8_10

red hat advisories RHSA-2026:27353RHSA-2026:27354RHSA-2026:27288RHSA-2026:25217

  • 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 6.12.0-211.26.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.26.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.26.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.26.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.26.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.26.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.26.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.26.1.el10_2

almalinux advisories ALSA-2026:27288ALSA-2026:27353ALSA-2026:27354ALSA-2026:25217

  • kernel Rocky Linux 8 4.18.0-553.136.1.el8_10
  • kernel Rocky Linux 10 6.12.0-211.26.1.el10_2
  • kernel-rt Rocky Linux 8 4.18.0-553.136.1.rt7.477.el8_10
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_7.cloud.1.0
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_8

rocky linux advisories RLSA-2026:27353RLSA-2026:27288RLSA-2026:27354RXSA-2026:25217RLSA-2026:25217

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-2026-43056 updated cvss 7.1

kernel: net: mana: fix use-after-free in add_adev() error path

  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.15.1.el9_8, perf 5.14.0-687.15.1.el9_8, rtla 5.14.0-687.15.1.el9_8, python3-perf 5.14.0-687.15.1.el9_8, kernel-devel-matched 5.14.0-687.15.1.el9_8, kernel-64k-devel-matched 5.14.0-687.15.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.26.1.el10_2, perf 6.12.0-211.26.1.el10_2, rtla 6.12.0-211.26.1.el10_2, python3-perf 6.12.0-211.26.1.el10_2, kernel-devel-matched 6.12.0-211.26.1.el10_2, kernel-64k-devel-matched 6.12.0-211.26.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:27288
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.136.1.el8_10, kernel 4.18.0-553.136.1.el8_10, bpftool 4.18.0-553.136.1.el8_10, kernel-core 4.18.0-553.136.1.el8_10, kernel-tools 4.18.0-553.136.1.el8_10, python3-perf 4.18.0-553.136.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:27353
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.15.1.el9_8, kernel-64k 5.14.0-687.15.1.el9_8, kernel-core 5.14.0-687.15.1.el9_8, kernel-tools 5.14.0-687.15.1.el9_8, kernel-modules 5.14.0-687.15.1.el9_8, kernel-64k-core 5.14.0-687.15.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.26.1.el10_2, kernel-64k 6.12.0-211.26.1.el10_2, kernel-core 6.12.0-211.26.1.el10_2, kernel-tools 6.12.0-211.26.1.el10_2, kernel-modules 6.12.0-211.26.1.el10_2, kernel-64k-core 6.12.0-211.26.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:27288
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.15.1.el9_8
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.26.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.26.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.26.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.26.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.26.1.el10_2
    fixed: vendor fix RHSA-2026:27288
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.136.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.136.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.136.1.el8_10
    fixed: vendor fix RHSA-2026:27353
show 7 more
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-kvm 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-core 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-modules 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-kvm 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-core 4.18.0-553.136.1.rt7.477.el8_10, +4 more
    fixed: vendor fix RHSA-2026:27354
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-64k 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-64k-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.26.1.el10_2, kernel-rt-64k 6.12.0-211.26.1.el10_2, kernel-rt-core 6.12.0-211.26.1.el10_2, kernel-rt-modules 6.12.0-211.26.1.el10_2, kernel-rt-64k-core 6.12.0-211.26.1.el10_2, kernel-rt-debug-core 6.12.0-211.26.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:27288
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, kernel-rt-modules-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-modules 5.14.0-687.15.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.26.1.el10_2, kernel-rt-core 6.12.0-211.26.1.el10_2, kernel-rt-modules 6.12.0-211.26.1.el10_2, kernel-rt-debug-core 6.12.0-211.26.1.el10_2, kernel-rt-modules-core 6.12.0-211.26.1.el10_2, kernel-rt-debug-modules 6.12.0-211.26.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:27288
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-core 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-modules 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-core 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-modules 4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-modules-extra 4.18.0-553.136.1.rt7.477.el8_10, +2 more
    fixed: vendor fix RHSA-2026:27354
  • 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 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
24 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
CNA 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.