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High · 7.8 CVE-2025-40096 EUVD-2025-36982GHSA-xpm8-g6rj-74pw

drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies

Published Oct 30, 2025 · Updated Aug 5, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.14 Package: linux-aws-6.17 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.14 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.14 Package: linux-azure-fde-6.2 Package: linux-azure-fde-6.8 Package: linux-azure-fips Package: linux-azure-nvidia Package: linux-azure-nvidia-6.14 Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.14 Package: linux-gcp-6.17 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.14 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-6.8 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-lowlatency Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.17 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.14 Package: linux-oem-6.17 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.14 Package: linux-oracle-6.17 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.14 Package: linux-realtime-6.17 Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.14 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies

When adding dependencies with drm_sched_job_add_dependency(), that
function consumes the fence reference both on success and failure, so in
the latter case the dma_fence_put() on the error path (xarray failed to
expand) is a double free.

Interestingly this bug appears to have been present ever since
commit ebd5f74255b9 ("drm/sched: Add dependency tracking"), since the code
back then looked like this:

drm_sched_job_add_implicit_dependencies():
...
for (i = 0; i < fence_count; i++) {
ret = drm_sched_job_add_dependency(job, fences[i]);
if (ret)
break;
}

for (; i < fence_count; i++)
dma_fence_put(fences[i]);

Which means for the failing 'i' the dma_fence_put was already a double
free. Possibly there were no users at that time, or the test cases were
insufficient to hit it.

The bug was then only noticed and fixed after
commit 9c2ba265352a ("drm/scheduler: use new iterator in drm_sched_job_add_implicit_dependencies v2")
landed, with its fixup of
commit 4eaf02d6076c ("drm/scheduler: fix drm_sched_job_add_implicit_dependencies").

At that point it was a slightly different flavour of a double free, which
commit 963d0b356935 ("drm/scheduler: fix drm_sched_job_add_implicit_dependencies harder")
noticed and attempted to fix.

But it only moved the double free from happening inside the
drm_sched_job_add_dependency(), when releasing the reference not yet
obtained, to the caller, when releasing the reference already released by
the former in the failure case.

As such it is not easy to identify the right target for the fixes tag so
lets keep it simple and just continue the chain.

While fixing we also improve the comment and explain the reason for taking
the reference and not dropping it.

Affected products

VendorProductAffectedFixed
Linux Linux 5.16 6.1.158

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.17.6-1 —
Debian 13 linux 6.12.57-1 —
Debian 12 linux 6.1.158-1 DSA-6053-1
Debian 11 linux-6.1 6.1.158-1~deb11u1 DLA-4379-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 24.04 LTS linux-bluefield 6.8.0-1017.21 —
Ubuntu 25.10 linux 6.17.0-14.14 USN-8029-1
Ubuntu 25.10 linux-aws +2 6.17.0-1007.7 USN-8030-1, USN-8029-2
Ubuntu 25.10 linux-azure +1 6.17.0-1008.8 USN-8029-3, USN-8029-1
Ubuntu 25.10 linux-azure-fde No fix yet —
Ubuntu 25.10 linux-realtime 6.17.0-1006.7 USN-8029-1
Ubuntu 25.10 linux-riscv 6.17.0-14.14.1 —
Ubuntu 24.04 LTS linux 6.8.0-106.106 USN-8095-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1050.53 USN-8095-1
Ubuntu 24.04 LTS linux-aws-6.17 +1 6.17.0-1007.7~24.04.1 —
Ubuntu 24.04 LTS linux-azure 6.8.0-1051.57 USN-8125-1
Ubuntu 24.04 LTS linux-azure-fde 6.8.0-1058.65 —
Ubuntu 24.04 LTS linux-azure-nvidia 6.8.0-1039.42 —
Ubuntu 24.04 LTS linux-gcp 6.8.0-1052.55 USN-8095-1
Ubuntu 24.04 LTS linux-gcp-6.17 6.17.0-1008.8~24.04.1 —
Ubuntu 24.04 LTS linux-gke 6.8.0-1048.53 USN-8095-1
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1035.38 USN-8095-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1049.49 USN-8095-1
Ubuntu 24.04 LTS linux-lowlatency 6.8.0-106.106.1 USN-8095-1
Ubuntu 24.04 LTS linux-nvidia 6.8.0-1049.52 USN-8100-1
Ubuntu 24.04 LTS linux-nvidia-6.17 6.17.0-1008.8 —
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1049.52.1 USN-8100-1
Ubuntu 24.04 LTS linux-nvidia-tegra 6.8.0-1020.20 —
Ubuntu 24.04 LTS linux-oem-6.17 6.17.0-1011.11 USN-8048-1
Ubuntu 24.04 LTS linux-oracle 6.8.0-1047.48 USN-8095-1
Ubuntu 24.04 LTS linux-raspi 6.8.0-1050.54 USN-8095-5
Ubuntu 24.04 LTS linux-riscv +18 No fix yet —
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1028.29 USN-8261-1
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1050.53~22.04.1 USN-8095-4
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1051.57~22.04.1 USN-8126-1
Ubuntu 22.04 LTS linux-azure-fde-6.8 6.8.0-1058.65~22.04.1 —
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1052.55~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-hwe-6.8 +1 6.8.0-106.106~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1049.49~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.8 6.8.0-106.106.1~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-nvidia-6.8 6.8.0-1049.52~22.04.1 USN-8100-1
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1047.48~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Show 5 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2040.41 USN-8095-5
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1045.46 USN-8095-3
Ubuntu Pro Realtime 24.04 LTS linux-realtime-6.14 No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-realtime-6.17 6.17.0-1006.7~24.04.1 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1045.46~22.04.1 USN-8095-3
Ubuntu Pro FIPS-updates 24.04 LTS linux-aws-fips 6.8.0-1050.53+fips1 USN-8095-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-azure-fips 6.8.0-1052.58+fips1 USN-8165-1
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-106.106+fips1 USN-8095-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-gcp-fips 6.8.0-1052.55+fips1 USN-8095-2
ReleasePackageFixed inAdvisory
RHEL 10 rv +76 6.12.0-124.39.1.el10_1 RHSA-2026:3275
RHEL 9 rv +75 5.14.0-611.45.1.el9_7 RHSA-2026:6153
RHEL 8 kernel-rt +11 4.18.0-553.94.1.rt7.435.el8_10 RHSA-2026:0760
RHEL 8 perf +22 4.18.0-553.94.1.el8_10 RHSA-2026:0759
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 10.0 EUS rv +77 6.12.0-55.65.1.el10_0 RHSA-2026:6193
RHEL 9.6 EUS rv +77 5.14.0-570.103.1.el9_6 RHSA-2026:6164
RHEL 9.4 EUS bpftool 7.3.0-427.109.1.el9_4 RHSA-2026:1879
RHEL 9.4 EUS rv +64 5.14.0-427.109.1.el9_4 RHSA-2026:1879
RHEL 9.2 E4S bpftool 7.0.0-284.156.1.el9_2 RHSA-2026:2560
RHEL 9.2 E4S kernel-rt +14 5.14.0-284.156.1.rt14.441.el9_2 RHSA-2026:2583
RHEL 9.2 E4S perf +47 5.14.0-284.156.1.el9_2 RHSA-2026:2560
RHEL 8.8 TUS perf +17 4.18.0-477.128.1.el8_8 RHSA-2026:2535
RHEL 8.8 E4S perf +18 4.18.0-477.128.1.el8_8 RHSA-2026:2535

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 kernel-doc +1 6.12.0-124.39.1.el10_1 ALSA-2026:3275
AlmaLinux 9 rv +73 5.14.0-611.45.1.el9_7 ALSA-2026:6153
AlmaLinux 8 kernel-rt +9 4.18.0-553.94.1.rt7.435.el8_10 ALSA-2026:0760
AlmaLinux 8 perf +24 4.18.0-553.94.1.el8_10 ALSA-2026:0759

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 9 kernel 5.14.0-611.45.1.el9_7 RLSA-2026:6153
Rocky Linux 8 kernel 4.18.0-553.94.1.el8_10 RLSA-2026:0759
Rocky Linux 8 kernel-rt 4.18.0-553.94.1.rt7.435.el8_10 RLSA-2026:0760
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +6 6.4.0-150700.53.22.1 SUSE-SU-2025:4057-1
SLES 15 SP7 kernel-azure +2 6.4.0-150700.20.18.1 SUSE-SU-2025:4132-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.22.1.150700.17.15.1 SUSE-SU-2025:4057-1
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.78.1 SUSE-SU-2025:4140-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.55.1 SUSE-SU-2025:4128-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.78.1.150600.12.34.2 SUSE-SU-2025:4140-1
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 kernel-64kb +7 6.12.0-160000.7.1 SUSE-SU-2025:21147-1
SLES for SAP 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21147-1
SLES 16.0 kernel-64kb +7 6.12.0-160000.7.1 SUSE-SU-2025:21180-1, SUSE-SU-2025:21147-1
SLES 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21147-1
SLE Micro 6.2 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21080-1
SLE Micro 6.2 kernel-rt +5 6.12.0-160000.7.1 SUSE-SU-2026:20561-1, SUSE-SU-2025:21080-1
SLE Micro 6.1 kernel-default-base 6.4.0-36.1.21.13 SUSE-SU-2025:21056-1
SLE Micro 6.1 kernel-rt +1 6.4.0-38.1 SUSE-SU-2025:21064-1
SLE Micro 6.1 kernel-source +2 6.4.0-36.1 SUSE-SU-2025:21056-1
SLE Micro 6.0 kernel-default-base 6.4.0-36.1.21.13 SUSE-SU-2025:21040-1
SLE Micro 6.0 kernel-rt +1 6.4.0-38.1 SUSE-SU-2025:21052-1
SLE Micro 6.0 kernel-source +2 6.4.0-36.1 SUSE-SU-2025:21040-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.22.1 SUSE-SU-2025:4057-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_6 1-150700.1.3.1 SUSE-SU-2025:4141-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_6 1-150700.15.3.1 SUSE-SU-2025:4057-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.78.1 SUSE-SU-2025:4140-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_17 1-150600.1.3.1 SUSE-SU-2025:4301-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_17 1-150600.13.5.1 SUSE-SU-2025:4140-1
SUSE Real Time Module 15 SP7 kernel-rt +2 6.4.0-150700.7.22.1 SUSE-SU-2025:4141-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.58.1 SUSE-SU-2025:4301-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed kernel-source 6.17.7-1.1 openSUSE-SU-2025:15702-1
openSUSE Tumbleweed kernel-source-longterm 6.18.16-1.1 openSUSE-SU-2026:10301-1
openSUSE Leap 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 openSUSE-SU-2025:20091-1
openSUSE Leap 16.0 kernel-rt +10 6.12.0-160000.7.1 openSUSE-SU-2025:20091-1
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.78.1 SUSE-SU-2025:4140-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.55.1 SUSE-SU-2025:4128-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.78.1.150600.12.34.2 SUSE-SU-2025:4140-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.58.1 SUSE-SU-2025:4301-1

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 kernel 6.6.117.1-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 10 rv +29 6.12.0-124.39.1.el10_1 ELSA-2026-3275
Oracle Linux 9 kernel-uek +34 6.12.0-106.55.4.1.el10uek ELSA-2025-28040
Oracle Linux 9 rv +28 5.14.0-611.45.1.el9_7 ELSA-2026-6153
Oracle Linux 8 perf +19 4.18.0-553.94.1.el8_10 ELSA-2026-0759

Advisories 50

References