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Linux Kernel CVE-2026-43298

| EUVDEUVD-2026-28568 MEDIUM
2026-05-08 Linux GHSA-f32h-8q3x-fpmq
Amd Red Hat Information Disclosure Ubuntu Linux Suse
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SUSE
MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Analysis Generated
May 15, 2026 - 15:07 vuln.today
CVSS changed
May 15, 2026 - 15:07 NVD
5.5 (MEDIUM)
Patch available
May 08, 2026 - 14:33 EUVD
CVE Published
May 08, 2026 - 13:11 nvd
UNKNOWN (no severity yet)

DescriptionCVE.org

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

drm/amdgpu: Skip vcn poison irq release on VF

VF doesn't enable VCN poison irq in VCNv2.5. Skip releasing it and avoid call trace during deinitialization.

[ 71.913601] [drm] clean up the vf2pf work item [ 71.915088] ------------[ cut here ]------------ [ 71.915092] WARNING: CPU: 3 PID: 1079 at /tmp/amd.aFkFvSQl/amd/amdgpu/amdgpu_irq.c:641 amdgpu_irq_put+0xc6/0xe0 [amdgpu] [ 71.915355] Modules linked in: amdgpu(OE-) amddrm_ttm_helper(OE) amdttm(OE) amddrm_buddy(OE) amdxcp(OE) amddrm_exec(OE) amd_sched(OE) amdkcl(OE) drm_suballoc_helper drm_display_helper cec rc_core i2c_algo_bit video wmi binfmt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common input_leds joydev serio_raw mac_hid qemu_fw_cfg sch_fq_codel dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua efi_pstore ip_tables x_tables autofs4 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 hid_generic crct10dif_pclmul crc32_pclmul polyval_clmulni polyval_generic ghash_clmulni_intel usbhid 8139too sha256_ssse3 sha1_ssse3 hid psmouse bochs i2c_i801 ahci drm_vram_helper libahci i2c_smbus lpc_ich drm_ttm_helper 8139cp mii ttm aesni_intel crypto_simd cryptd [ 71.915484] CPU: 3 PID: 1079 Comm: rmmod Tainted: G OE 6.8.0-87-generic #88~22.04.1-Ubuntu [ 71.915489] Hardware name: Red Hat KVM/RHEL, BIOS 1.16.3-2.el9_5.1 04/01/2014 [ 71.915492] RIP: 0010:amdgpu_irq_put+0xc6/0xe0 [amdgpu] [ 71.915768] Code: 75 84 b8 ea ff ff ff eb d4 44 89 ea 48 89 de 4c 89 e7 e8 fd fc ff ff 5b 41 5c 41 5d 41 5e 5d 31 d2 31 f6 31 ff e9 55 30 3b c7 <0f> 0b eb d4 b8 fe ff ff ff eb a8 e9 b7 3b 8a 00 66 2e 0f 1f 84 00 [ 71.915771] RSP: 0018:ffffcf0800eafa30 EFLAGS: 00010246 [ 71.915775] RAX: 0000000000000000 RBX: ffff891bda4b0668 RCX: 0000000000000000 [ 71.915777] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 71.915779] RBP: ffffcf0800eafa50 R08: 0000000000000000 R09: 0000000000000000 [ 71.915781] R10: 0000000000000000 R11: 0000000000000000 R12: ffff891bda480000 [ 71.915782] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 71.915792] FS: 000070cff87c4c40(0000) GS:ffff893abfb80000(0000) knlGS:0000000000000000 [ 71.915795] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.915797] CR2: 00005fa13073e478 CR3: 000000010d634006 CR4: 0000000000770ef0 [ 71.915800] PKRU: 55555554 [ 71.915802] Call Trace: [ 71.915805] <TASK> [ 71.915809] vcn_v2_5_hw_fini+0x19e/0x1e0 [amdgpu]

AnalysisAI

Denial of service in Linux kernel drm/amdgpu driver (VCNv2.5) affects virtual function (VF) GPU environments running kernel versions prior to 6.18.16, 6.19.6, and 7.0. During module unload or system deinitialization, VF configurations trigger a kernel warning and potential crash when attempting to release an uninitialized VCN poison interrupt handler. EPSS exploitation probability is very low (0.02%, 4th percentile) with no public exploit or active exploitation (not in CISA KEV). Vendor patches available across multiple stable kernel branches via upstream commits.

Technical ContextAI

This vulnerability resides in the AMD GPU (amdgpu) Direct Rendering Manager (DRM) driver, specifically in the Video Core Next (VCN) 2.5 hardware acceleration component used for video encoding/decoding. In virtualized GPU environments using SR-IOV (Single Root I/O Virtualization), Virtual Functions (VFs) have a different initialization path than Physical Functions (PFs). The VCNv2.5 implementation does not enable the VCN poison interrupt for VFs during initialization, but the cleanup code in vcn_v2_5_hw_fini() unconditionally attempts to release this interrupt via amdgpu_irq_put(). This triggers a kernel WARNING at amdgpu_irq.c:641 because the interrupt source was never registered. The issue manifests during module removal (rmmod amdgpu) or GPU device teardown in virtualized environments where AMD GPUs are passed through to virtual machines or containers. The affected code path is visible in the call trace through vcn_v2_5_hw_fini() attempting cleanup operations that assume resources were initialized.

RemediationAI

Update to patched Linux kernel versions: 6.18.16 or later for the 6.18 stable series, 6.19.6 or later for the 6.19 series, or 7.0 and above for mainline kernels. Patches are available through standard distribution update channels-Ubuntu users should apply kernel updates via apt, Red Hat/RHEL via yum/dnf. Upstream fixes are committed in git.kernel.org stable branches at commits 8ee9aa80d4f1 (7.0), f1db6fc5a834 (6.18.16), and 8980be03b3f9 (6.19.6). The fix adds a conditional check to skip VCN poison interrupt release in VF configurations where it was never initialized. Workaround: if immediate patching is not feasible, avoid repeatedly unloading the amdgpu module in virtualized GPU environments-this limits exposure to the cleanup code path. For SR-IOV VF deployments, maintain persistent VF attachments rather than hot-plugging to minimize driver reinitialization cycles. Note that the workaround does not eliminate the bug but reduces trigger frequency; it introduces operational constraints on GPU management flexibility. No configuration changes can fully mitigate without the code fix since the issue is in driver logic during teardown.

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed

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CVE-2026-43298 vulnerability details – vuln.today
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