In the Linux kernel, the following vulnerability has been resolved:
drm/gem: Acquire references on GEM handles for framebuffers
A GEM handle can be released while the GEM buffer object is attached to a DRM framebuffer. This leads to the release of the dma-buf backing the buffer object, if any. [1] Trying to use the framebuffer in further mode-setting operations leads to a segmentation fault. Most easily happens with driver that use shadow planes for vmap-ing the dma-buf during a page flip. An example is shown below.
[ 156.791968] ------------[ cut here ]------------ [ 156.796830] WARNING: CPU: 2 PID: 2255 at drivers/dma-buf/dma-buf.c:1527 dma_buf_vmap+0x224/0x430 [...] [ 156.942028] RIP: 0010:dma_buf_vmap+0x224/0x430 [ 157.043420] Call Trace: [ 157.045898] <TASK> [ 157.048030] ? show_trace_log_lvl+0x1af/0x2c0 [ 157.052436] ? show_trace_log_lvl+0x1af/0x2c0 [ 157.056836] ? show_trace_log_lvl+0x1af/0x2c0 [ 157.061253] ? drm_gem_shmem_vmap+0x74/0x710 [ 157.065567] ? dma_buf_vmap+0x224/0x430 [ 157.069446] ? __warn.cold+0x58/0xe4 [ 157.073061] ? dma_buf_vmap+0x224/0x430 [ 157.077111] ? report_bug+0x1dd/0x390 [ 157.080842] ? handle_bug+0x5e/0xa0 [ 157.084389] ? exc_invalid_op+0x14/0x50 [ 157.088291] ? asm_exc_invalid_op+0x16/0x20 [ 157.092548] ? dma_buf_vmap+0x224/0x430 [ 157.096663] ? dma_resv_get_singleton+0x6d/0x230 [ 157.101341] ? __pfx_dma_buf_vmap+0x10/0x10 [ 157.105588] ? __pfx_dma_resv_get_singleton+0x10/0x10 [ 157.110697] drm_gem_shmem_vmap+0x74/0x710 [ 157.114866] drm_gem_vmap+0xa9/0x1b0 [ 157.118763] drm_gem_vmap_unlocked+0x46/0xa0 [ 157.123086] drm_gem_fb_vmap+0xab/0x300 [ 157.126979] drm_atomic_helper_prepare_planes.part.0+0x487/0xb10 [ 157.133032] ? lockdep_init_map_type+0x19d/0x880 [ 157.137701] drm_atomic_helper_commit+0x13d/0x2e0 [ 157.142671] ? drm_atomic_nonblocking_commit+0xa0/0x180 [ 157.147988] drm_mode_atomic_ioctl+0x766/0xe40 [...] [ 157.346424] ---[ end trace 0000000000000000 ]---
Acquiring GEM handles for the framebuffer's GEM buffer objects prevents this from happening. The framebuffer's cleanup later puts the handle references.
Commit 1a148af06000 ("drm/gem-shmem: Use dma_buf from GEM object instance") triggers the segmentation fault easily by using the dma-buf field more widely. The underlying issue with reference counting has been present before.
v2: - acquire the handle instead of the BO (Christian) - fix comment style (Christian) - drop the Fixes tag (Christian) - rename err_ gotos - add missing Link tag
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-64k-debug-develUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-rt-debug-kvmUpgrade kernel-rt-debug-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-debug-devel-matchedUpgrade kernel-uki-virtUpgrade kernel-zfcpdump-develUpgrade kernel-devel-matchedUpgrade libperfUpgrade kernel-rt-coreUpgrade kernel-rt-debug-develUpgrade kernel-debug-coreUpgrade kernel-modulesUpgrade kernel-debug-develUpgrade kernel-modules-extraUpgrade kernel-64k-modules-coreUpgrade kernel-debug-uki-virtUpgrade kernel-rt-64k-debug-modulesUpgrade kernel-debugUpgrade kernel-rt-debug-modules-extraUpgrade kernel-64k-debug-modules-extraUpgrade kernel-develUpgrade perfUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-modules-coreUpgrade kernel-coreUpgrade python3-perfUpgrade kernel-64k-coreUpgrade rtlaUpgrade kernel-64k-develUpgrade kernel-docUpgrade kernel-zfcpdumpUpgrade kernel-rt-debug-modules-coreUpgrade kernel-headersUpgrade kernel-rt-modulesUpgrade kernel-zfcpdump-coreUpgrade kernel-64k-devel-matchedUpgrade kernel-rt-64k-modulesUpgrade kernel-rt-64kUpgrade kernel-64k-modulesUpgrade kernel-rt-64k-coreUpgrade kernel-rt-kvmUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernel-64k-debug-modulesUpgrade kernel-rtUpgrade bpftoolUpgrade kernel-64k-modules-extraUpgrade kernel-debug-modules-extraUpgrade kernel-zfcpdump-modulesUpgrade kernel-cross-headersUpgrade kernel-rt-64k-modules-extraUpgrade kernel-uki-virt-addonsUpgrade kernel-debug-modulesUpgrade kernelUpgrade kernel-rt-64k-debug-develUpgrade kernel-rt-64k-modules-coreUpgrade kernel-64kUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-64k-debug-modules-coreUpgrade kernel-rt-debugUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-rt-debug-coreUpgrade kernel-64k-debug-coreUpgrade kernel-rt-develUpgrade kernel-rt-modules-extraUpgrade kernel-rt-64k-debug-coreUpgrade kernel-rt-64k-develUpgrade kernel-abi-stablelistsUpgrade kernel-rt-modules-coreUpgrade kernel-rt-64k-debugUpgrade rvUpgrade kernel-64k-debugUpgrade kernel-tools-libs-devel | Sep 17, 2025 | Sep 15, 2025 |
| Amazon_linux_2023 | — | Upgrade kernel6.12-modules-extraUpgrade perf6.12Upgrade kernel6.12-tools-debuginfoUpgrade python3-perf6.12Upgrade kernel-livepatch-6.12.40-63.114Upgrade python3-perf6.12-debuginfoUpgrade kernel6.12-libbpf-staticUpgrade kernel6.12-libbpfUpgrade kernel6.12-toolsUpgrade kernel6.12-modules-extra-commonUpgrade bpftool6.12Upgrade kernel6.12-headersUpgrade kernel6.12-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-tools-develUpgrade kernel6.12Upgrade kernel6.12-develUpgrade kernel6.12-libbpf-develUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-libbpf-debuginfoUpgrade perf6.12-debuginfo | Sep 16, 2025 | Jul 25, 2025 |
| Debian | — | Upgrade linux | Jul 28, 2025 | Jul 28, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-tools | Nov 12, 2025 | Oct 10, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade kernelUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Oct 14, 2025 | Oct 10, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade python3-perfUpgrade kernel-tools | Nov 12, 2025 | Oct 10, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernel | Oct 24, 2025 | Oct 10, 2025 |
| Oracle_linux | — | Upgrade kernel | Sep 12, 2025 | Jul 25, 2025 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | Jul 31, 2025 | Jul 25, 2025 |
| Rocky_linux | — | Upgrade kernel-rt-debug-debuginfoUpgrade kernelUpgrade python3-perfUpgrade kernel-rt-develUpgrade kernel-debug-modulesUpgrade kernel-rt-modules-extraUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-coreUpgrade kernel-rt-debug-coreUpgrade libperf-debuginfoUpgrade kernel-develUpgrade kernel-rt-kvmUpgrade kernel-debug-devel-matchedUpgrade kernel-debuginfoUpgrade kernel-tools-libsUpgrade rtlaUpgrade python3-perf-debuginfoUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-tools-libs-develUpgrade perf-debuginfoUpgrade kernel-debug-develUpgrade kernel-zfcpdump-develUpgrade kernel-uki-virt-addonsUpgrade kernel-toolsUpgrade kernel-rt-debug-modulesUpgrade kernel-zfcpdump-coreUpgrade kernel-zfcpdumpUpgrade kernel-debug-modules-coreUpgrade kernel-debug-uki-virtUpgrade kernel-debug-modules-extraUpgrade kernel-modules-extraUpgrade kernel-zfcpdump-modulesUpgrade kernel-devel-matchedUpgrade kernel-uki-virtUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-modules-coreUpgrade kernel-rt-debug-develUpgrade kernel-rt-debugUpgrade kernel-debug-coreUpgrade kernel-rt-debug-kvmUpgrade perfUpgrade kernel-debug-debuginfoUpgrade kernel-debugUpgrade kernel-rt-modules-coreUpgrade kernel-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-rt-debuginfoUpgrade kernel-tools-debuginfoUpgrade rvUpgrade kernel-rtUpgrade kernel-modules-coreUpgrade kernel-modulesUpgrade libperf | Feb 5, 2026 | Oct 10, 2025 |
| Suse | — | Upgrade kselftests-kmp-defaultUpgrade dlm-kmp-defaultUpgrade kernel-rt_debug-vdsoUpgrade kernel-rt-develUpgrade kernel-64kb-extraUpgrade kernel-default-optionalUpgrade dlm-kmp-rtUpgrade kernel-default-extraUpgrade kernel-rtUpgrade kernel-rt-extraUpgrade kernel-syms-azureUpgrade kernel-docsUpgrade dtb-amlogicUpgrade kernel-default-baseUpgrade kernel-macrosUpgrade cluster-md-kmp-64kbUpgrade dtb-apmUpgrade kernel-rt-livepatchUpgrade kernel-azure-develUpgrade kernel-develUpgrade dtb-xilinxUpgrade kernel-devel-rtUpgrade cluster-md-kmp-defaultUpgrade dtb-mediatekUpgrade dtb-rockchipUpgrade kernel-defaultUpgrade dtb-nvidiaUpgrade dtb-qcomUpgrade reiserfs-kmp-azureUpgrade kernel-default-base-rebuildUpgrade kernel-default-vdsoUpgrade dtb-armUpgrade kernel-obs-qaUpgrade dlm-kmp-azureUpgrade kernel-symsUpgrade ocfs2-kmp-azureUpgrade kernel-obs-buildUpgrade cluster-md-kmp-rtUpgrade dtb-sprdUpgrade kernel-64kb-develUpgrade kselftests-kmp-rtUpgrade kernel-rt_debugUpgrade gfs2-kmp-64kbUpgrade kernel-debug-develUpgrade dtb-amdUpgrade cluster-md-kmp-azureUpgrade ocfs2-kmp-rtUpgrade kernel-default-manUpgrade kernel-debug-vdsoUpgrade kernel-azure-extraUpgrade kernel-azure-optionalUpgrade gfs2-kmp-azureUpgrade kselftests-kmp-azureUpgrade kernel-azure-vdsoUpgrade kernel-default-livepatchUpgrade kernel-64kb-optionalUpgrade reiserfs-kmp-defaultUpgrade kernel-kvmsmall-vdsoUpgrade kernel-default-livepatch-develUpgrade kernel-rt-livepatch-develUpgrade kernel-source-azureUpgrade dtb-renesasUpgrade kernel-default-develUpgrade dtb-marvellUpgrade reiserfs-kmp-rtUpgrade ocfs2-kmp-64kbUpgrade kernel-kvmsmallUpgrade kernel-sourceUpgrade kernel-docs-htmlUpgrade dtb-appleUpgrade dtb-alteraUpgrade kernel-azureUpgrade ocfs2-kmp-defaultUpgrade kselftests-kmp-64kbUpgrade kernel-syms-rtUpgrade kernel-source-rtUpgrade gfs2-kmp-rtUpgrade reiserfs-kmp-64kbUpgrade kernel-devel-azureUpgrade dtb-exynosUpgrade dtb-allwinnerUpgrade dtb-freescaleUpgrade kernel-64kbUpgrade gfs2-kmp-defaultUpgrade kernel-rt-vdsoUpgrade kernel-rt-optionalUpgrade dlm-kmp-64kbUpgrade kernel-zfcpdumpUpgrade dtb-lgUpgrade dtb-hisiliconUpgrade dtb-broadcomUpgrade dtb-amazonUpgrade kernel-rt_debug-develUpgrade dtb-caviumUpgrade kernel-source-vanillaUpgrade kernel-kvmsmall-develUpgrade kernel-debugUpgrade dtb-socionext | Dec 5, 2025 | Sep 12, 2025 |
| Ubuntu | — | Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-100-genericUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-6.14.0-1020-gcpUpgrade linux-image-gcp-6.8Upgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-ibmUpgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-azure-lts-24.04Upgrade linux-image-nvidiaUpgrade linux-image-generic-lpaeUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1046-azureUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-genericUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.14.0-36-generic-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-generic-64k-6.14Upgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-gcp-fipsUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-gkeopUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-fipsUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-aws-fipsUpgrade linux-image-oracle-6.14Upgrade linux-image-6.14.0-1017-aws-64kUpgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-lowlatency-6.8Upgrade linux-image-oracleUpgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-virtualUpgrade linux-image-gke-64kUpgrade linux-image-6.14.0-1017-awsUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-oem-6.14Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-azure-6.14Upgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-6.8.0-1051-azureUpgrade linux-image-virtual-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-azureUpgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-gkeUpgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-aws-6.14Upgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-6.14.0-1017-oracle-64kUpgrade linux-image-fips-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-aws-64kUpgrade linux-image-intel-iotgUpgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-aws-6.8Upgrade linux-image-raspiUpgrade linux-image-gke-6.8Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-raspi-6.14Upgrade linux-image-kvmUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-generic-64k-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-aws-fips-6.8Upgrade linux-image-xilinxUpgrade linux-image-oem-24.04aUpgrade linux-image-xilinx-6.8Upgrade linux-image-6.14.0-1018-raspiUpgrade linux-image-6.14.0-1017-azureUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-aws-64k-6.14Upgrade linux-image-gke-64k-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.14.0-1020-gcp-64kUpgrade linux-image-gcp-6.14Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-generic-64kUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-oem-22.04bUpgrade linux-image-gcpUpgrade linux-image-oem-22.04cUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-awsUpgrade linux-image-azure-fips-6.8Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.14.0-36-genericUpgrade linux-image-raspi-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-6.8.0-1046-awsUpgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-realtime-6.8.1Upgrade linux-image-6.14.0-1017-oracleUpgrade linux-image-gcp-64kUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oracle-6.8Upgrade linux-image-gcp-64k-6.14Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-aws-lts-24.04Upgrade linux-image-virtual-6.14Upgrade linux-image-realtimeUpgrade linux-image-6.14.0-1016-realtimeUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-6.14.0-1016-oemUpgrade linux-image-realtime-6.14Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-generic-6.14Upgrade linux-image-azure-fipsUpgrade linux-image-oem-22.04dUpgrade linux-image-oracle-64k | Jul 31, 2025 | Jul 25, 2025 |
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