CVE-2022-49069

MEDIUM
Published Feb 26, 2025 Modified Oct 14, 2025

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix by adding FPU protection for dcn30_internal_validate_bw [Why] Below general protection fault observed when WebGL Aquarium is run for longer duration. If drm debug logs are enabled and set to 0x1f then the issue is observed within 10 minutes of run. [ 100.717056] general protection fault, probably for non-canonical address 0x2d33302d32323032: 0000 [#1] PREEMPT SMP NOPTI [ 100.727921] CPU: 3 PID: 1906 Comm: DrmThread Tainted: G W 5.15.30 #12 d726c6a2d6ebe5cf9223931cbca6892f916fe18b [ 100.754419] RIP: 0010:CalculateSwathWidth+0x1f7/0x44f [ 100.767109] Code: 00 00 00 f2 42 0f 11 04 f0 48 8b 85 88 00 00 00 f2 42 0f 10 04 f0 48 8b 85 98 00 00 00 f2 42 0f 11 04 f0 48 8b 45 10 0f 57 c0 <f3> 42 0f 2a 04 b0 0f 57 c9 f3 43 0f 2a 0c b4 e8 8c e2 f3 ff 48 8b [ 100.781269] RSP: 0018:ffffa9230079eeb0 EFLAGS: 00010246 [ 100.812528] RAX: 2d33302d32323032 RBX: 0000000000000500 RCX: 0000000000000000 [ 100.819656] RDX: 0000000000000001 RSI: ffff99deb712c49c RDI: 0000000000000000 [ 100.826781] RBP: ffffa9230079ef50 R08: ffff99deb712460c R09: ffff99deb712462c [ 100.833907] R10: ffff99deb7124940 R11: ffff99deb7124d70 R12: ffff99deb712ae44 [ 100.841033] R13: 0000000000000001 R14: 0000000000000000 R15: ffffa9230079f0a0 [ 100.848159] FS: 00007af121212640(0000) GS:ffff99deba780000(0000) knlGS:0000000000000000 [ 100.856240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 100.861980] CR2: 0000209000fe1000 CR3: 000000011b18c000 CR4: 0000000000350ee0 [ 100.869106] Call Trace: [ 100.871555] <TASK> [ 100.873655] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 100.878449] CalculateSwathAndDETConfiguration+0x1a3/0x6dd [ 100.883937] dml31_ModeSupportAndSystemConfigurationFull+0x2ce4/0x76da [ 100.890467] ? kallsyms_lookup_buildid+0xc8/0x163 [ 100.895173] ? kallsyms_lookup_buildid+0xc8/0x163 [ 100.899874] ? __sprint_symbol+0x80/0x135 [ 100.903883] ? dm_update_plane_state+0x3f9/0x4d2 [ 100.908500] ? symbol_string+0xb7/0xde [ 100.912250] ? number+0x145/0x29b [ 100.915566] ? vsnprintf+0x341/0x5ff [ 100.919141] ? desc_read_finalized_seq+0x39/0x87 [ 100.923755] ? update_load_avg+0x1b9/0x607 [ 100.927849] ? compute_mst_dsc_configs_for_state+0x7d/0xd5b [ 100.933416] ? fetch_pipe_params+0xa4d/0xd0c [ 100.937686] ? dc_fpu_end+0x3d/0xa8 [ 100.941175] dml_get_voltage_level+0x16b/0x180 [ 100.945619] dcn30_internal_validate_bw+0x10e/0x89b [ 100.950495] ? dcn31_validate_bandwidth+0x68/0x1fc [ 100.955285] ? resource_build_scaling_params+0x98b/0xb8c [ 100.960595] ? dcn31_validate_bandwidth+0x68/0x1fc [ 100.965384] dcn31_validate_bandwidth+0x9a/0x1fc [ 100.970001] dc_validate_global_state+0x238/0x295 [ 100.974703] amdgpu_dm_atomic_check+0x9c1/0xbce [ 100.979235] ? _printk+0x59/0x73 [ 100.982467] drm_atomic_check_only+0x403/0x78b [ 100.986912] drm_mode_atomic_ioctl+0x49b/0x546 [ 100.991358] ? drm_ioctl+0x1c1/0x3b3 [ 100.994936] ? drm_atomic_set_property+0x92a/0x92a [ 100.999725] drm_ioctl_kernel+0xdc/0x149 [ 101.003648] drm_ioctl+0x27f/0x3b3 [ 101.007051] ? drm_atomic_set_property+0x92a/0x92a [ 101.011842] amdgpu_drm_ioctl+0x49/0x7d [ 101.015679] __se_sys_ioctl+0x7c/0xb8 [ 101.015685] do_syscall_64+0x5f/0xb8 [ 101.015690] ? __irq_exit_rcu+0x34/0x96 [How] It calles populate_dml_pipes which uses doubles to initialize. Adding FPU protection avoids context switch and probable loss of vba context as there is potential contention while drm debug logs are enabled.

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Frequently Asked Questions

What is CVE-2022-49069? +
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix by adding FPU protection for dcn30_internal_validate_bw [Why] Below general protection fault observed when WebGL Aquarium is run for longer duration. If drm debug logs are enabled and set to 0x1f then the issue is observed within 10 minutes of run. [ 100.717056] general protection fault, probably for non-canonical address 0x2d33302d32323032: 0000 [#1] PREEMPT SMP NOPTI [ 100.727921] CPU: 3 PID: 1906 Comm: DrmThread Tainted: G W 5.15.30 #12 d726c6a2d6ebe5cf9223931cbca6892f916fe18b [ 100.754419] RIP: 0010:CalculateSwathWidth+0x1f7/0x44f [ 100.767109] Code: 00 00 00 f2 42 0f 11 04 f0 48 8b 85 88 00 00 00 f2 42 0f 10 04 f0 48 8b 85 98 00 00 00 f2 42 0f 11 04 f0 48 8b 45 10 0f 57 c0 <f3> 42 0f 2a 04 b0 0f 57 c9 f3 43 0f 2a 0c b4 e8 8c e2 f3 ff 48 8b [ 100.781269] RSP: 0018:ffffa9230079eeb0 EFLAGS: 00010246 [ 100.812528] RAX: 2d33302d32323032 RBX: 0000000000000500 RCX: 0000000000000000 [ 100.819656] RDX: 0000000000000001 RSI: ffff99deb712c49c RDI: 0000000000000000 [ 100.826781] RBP: ffffa9230079ef50 R08: ffff99deb712460c R09: ffff99deb712462c [ 100.833907] R10: ffff99deb7124940 R11: ffff99deb7124d70 R12: ffff99deb712ae44 [ 100.841033] R13: 0000000000000001 R14: 0000000000000000 R15: ffffa9230079f0a0 [ 100.848159] FS: 00007af121212640(0000) GS:ffff99deba780000(0000) knlGS:0000000000000000 [ 100.856240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 100.861980] CR2: 0000209000fe1000 CR3: 000000011b18c000 CR4: 0000000000350ee0 [ 100.869106] Call Trace: [ 100.871555] <TASK> [ 100.873655] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 100.878449] CalculateSwathAndDETConfiguration+0x1a3/0x6dd [ 100.883937] dml31_ModeSupportAndSystemConfigurationFull+0x2ce4/0x76da [ 100.890467] ? kallsyms_lookup_buildid+0xc8/0x163 [ 100.895173] ? kallsyms_lookup_buildid+0xc8/0x163 [ 100.899874] ? __sprint_symbol+0x80/0x135 [ 100.903883] ? dm_update_plane_state+0x3f9/0x4d2 [ 100.908500] ? symbol_string+0xb7/0xde [ 100.912250] ? number+0x145/0x29b [ 100.915566] ? vsnprintf+0x341/0x5ff [ 100.919141] ? desc_read_finalized_seq+0x39/0x87 [ 100.923755] ? update_load_avg+0x1b9/0x607 [ 100.927849] ? compute_mst_dsc_configs_for_state+0x7d/0xd5b [ 100.933416] ? fetch_pipe_params+0xa4d/0xd0c [ 100.937686] ? dc_fpu_end+0x3d/0xa8 [ 100.941175] dml_get_voltage_level+0x16b/0x180 [ 100.945619] dcn30_internal_validate_bw+0x10e/0x89b [ 100.950495] ? dcn31_validate_bandwidth+0x68/0x1fc [ 100.955285] ? resource_build_scaling_params+0x98b/0xb8c [ 100.960595] ? dcn31_validate_bandwidth+0x68/0x1fc [ 100.965384] dcn31_validate_bandwidth+0x9a/0x1fc [ 100.970001] dc_validate_global_state+0x238/0x295 [ 100.974703] amdgpu_dm_atomic_check+0x9c1/0xbce [ 100.979235] ? _printk+0x59/0x73 [ 100.982467] drm_atomic_check_only+0x403/0x78b [ 100.986912] drm_mode_atomic_ioctl+0x49b/0x546 [ 100.991358] ? drm_ioctl+0x1c1/0x3b3 [ 100.994936] ? drm_atomic_set_property+0x92a/0x92a [ 100.999725] drm_ioctl_kernel+0xdc/0x149 [ 101.003648] drm_ioctl+0x27f/0x3b3 [ 101.007051] ? drm_atomic_set_property+0x92a/0x92a [ 101.011842] amdgpu_drm_ioctl+0x49/0x7d [ 101.015679] __se_sys_ioctl+0x7c/0xb8 [ 101.015685] do_syscall_64+0x5f/0xb8 [ 101.015690] ? __irq_exit_rcu+0x34/0x96 [How] It calles populate_dml_pipes which uses doubles to initialize. Adding FPU protection avoids context switch and probable loss of vba context as there is potential contention while drm debug logs are enabled. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2022-49069? +
CVE-2022-49069 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2022-49069? +
CVE-2022-49069 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2022-49069? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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