NVD

CVE-2026-68305 Detail

Received

This CVE record has recently been published to the CVE List and has been included within the NVD dataset.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers CCS read/write buffers are freed during BO destruction. In some cases, BOs may be destroyed after the device is unbound but while the DRM structure remains valid, leading to NULL pointer dereferences when accessing device resources. BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 0 UID: 0 PID: 9376 Comm: xe_pat Not tainted 7.2.0-rc2+ #1 PREEMPT(lazy) RIP: 0010:xe_sriov_vf_ccs_rw_update_bb_addr+0x4d/0xa0 [xe] RSP: 0018:ffffcf304110b9c8 EFLAGS: 00010246 RAX: ffff8a85c38a0a00 RBX: 00000000810ef000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8a85c39c1888 RBP: ffffcf304110b9e8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a85c39c1888 R13: 0000000000000000 R14: ffff8a85c39b4f28 R15: ffff8a85c3885000 FS: 0000000000000000(0000) GS:ffff8a878b809000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000010314a002 CR4: 0000000000772ef0 PKRU: 55555554 Call Trace: <TASK> xe_migrate_ccs_rw_copy_clear+0x98/0x120 [xe] xe_sriov_vf_ccs_detach_bo+0x2c/0x60 [xe] xe_ttm_bo_delete_mem_notify+0xc8/0xe0 [xe] ttm_bo_cleanup_memtype_use+0x26/0x80 [ttm] ttm_bo_release+0x29e/0x2d0 [ttm] ttm_bo_fini+0x39/0x70 [ttm] xe_gem_object_free+0x1f/0x30 [xe] drm_gem_object_free+0x1d/0x40 ttm_bo_vm_close+0x5f/0x90 [ttm] remove_vma+0x2c/0x70 tear_down_vmas+0x63/0xf0 exit_mmap+0x20d/0x3f0 __mmput+0x45/0x170 mmput+0x31/0x40 do_exit+0x2ba/0xac0 do_group_exit+0x2d/0xb0 __x64_sys_exit_group+0x18/0x20 x64_sys_call+0x14a0/0x2390 do_syscall_64+0xdd/0x640 ? count_memcg_events+0xea/0x240 ? handle_mm_fault+0x1ec/0x2f0 (cherry picked from commit 1ae415a6eefe5004954a1d352b1718faca8844ef)

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

Nist CVSS score does not match with CNA score

CNA: kernel.org

Base Score: 7.8 HIGH

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/stable/c/4c92afb4c143526d340545ca581e88e6952ea511	kernel.org
https://git.kernel.org/stable/c/523ed2831ee55b2a1edabdea96781651f9df9685	kernel.org

Weakness Enumeration

CWE-ID	CWE Name	Source

Change History

3 change records found show changes

CVE Modified by kernel.org 8/17/2026 1:18:33 AM

Action

Type

Old Value

New Value

Changed

Affected

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/gpu/drm/xe/xe_migrate.c","drivers/gpu/drm/xe/xe_migrate.h","drivers/gpu/drm/xe/xe_sriov_vf_ccs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"864690cf4dd62482b6dd049d82c509886c904303","lessThan":"523ed2831ee55b2a1edabdea96781651f9df9685","versionType":"git","status":"affected"},{"version":"864690cf4dd62482b6dd049d82c509886c904303","lessThan":"4c92afb4c143526d340545ca581e88e6952ea511","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/gpu/drm/xe/xe_migrate.c","drivers/gpu/drm/xe/xe_migrate.h","drivers/gpu/drm/xe/xe_sriov_vf_ccs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc5","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/gpu/drm/xe/xe_migrate.c","drivers/gpu/drm/xe/xe_migrate.h","drivers/gpu/drm/xe/xe_sriov_vf_ccs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"864690cf4dd62482b6dd049d82c509886c904303","lessThan":"523ed2831ee55b2a1edabdea96781651f9df9685","versionType":"git","status":"affected"},{"version":"864690cf4dd62482b6dd049d82c509886c904303","lessThan":"4c92afb4c143526d340545ca581e88e6952ea511","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/gpu/drm/xe/xe_migrate.c","drivers/gpu/drm/xe/xe_migrate.h","drivers/gpu/drm/xe/xe_sriov_vf_ccs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

New CVE Received from kernel.org 8/10/2026 9:20:20 AM

Action	Type	New Value
Added	Description	In the Linux kernel, the following vulnerability has been resolved: drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers CCS read/write buffers are freed during BO destruction. In some cases, BOs may be destroyed after the device is unbound but while the DRM structure remains valid, leading to NULL pointer dereferences when accessing device resources. BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 0 UID: 0 PID: 9376 Comm: xe_pat Not tainted 7.2.0-rc2+ #1 PREEMPT(lazy) RIP: 0010:xe_sriov_vf_ccs_rw_update_bb_addr+0x4d/0xa0 [xe] RSP: 0018:ffffcf304110b9c8 EFLAGS: 00010246 RAX: ffff8a85c38a0a00 RBX: 00000000810ef000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8a85c39c1888 RBP: ffffcf304110b9e8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a85c39c1888 R13: 0000000000000000 R14: ffff8a85c39b4f28 R15: ffff8a85c3885000 FS: 0000000000000000(0000) GS:ffff8a878b809000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000010314a002 CR4: 0000000000772ef0 PKRU: 55555554 Call Trace: <TASK> xe_migrate_ccs_rw_copy_clear+0x98/0x120 [xe] xe_sriov_vf_ccs_detach_bo+0x2c/0x60 [xe] xe_ttm_bo_delete_mem_notify+0xc8/0xe0 [xe] ttm_bo_cleanup_memtype_use+0x26/0x80 [ttm] ttm_bo_release+0x29e/0x2d0 [ttm] ttm_bo_fini+0x39/0x70 [ttm] xe_gem_object_free+0x1f/0x30 [xe] drm_gem_object_free+0x1d/0x40 ttm_bo_vm_close+0x5f/0x90 [ttm] remove_vma+0x2c/0x70 tear_down_vmas+0x63/0xf0 exit_mmap+0x20d/0x3f0 __mmput+0x45/0x170 mmput+0x31/0x40 do_exit+0x2ba/0xac0 do_group_exit+0x2d/0xb0 __x64_sys_exit_group+0x18/0x20 x64_sys_call+0x14a0/0x2390 do_syscall_64+0xdd/0x640 ? count_memcg_events+0xea/0x240 ? handle_mm_fault+0x1ec/0x2f0 (cherry picked from commit 1ae415a6eefe5004954a1d352b1718faca8844ef)
Added	Reference	https://git.kernel.org/stable/c/4c92afb4c143526d340545ca581e88e6952ea511
Added	Reference	https://git.kernel.org/stable/c/523ed2831ee55b2a1edabdea96781651f9df9685
Added	Affected	[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/gpu/drm/xe/xe_migrate.c","drivers/gpu/drm/xe/xe_migrate.h","drivers/gpu/drm/xe/xe_sriov_vf_ccs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"864690cf4dd62482b6dd049d82c509886c904303","lessThan":"523ed2831ee55b2a1edabdea96781651f9df9685","versionType":"git","status":"affected"},{"version":"864690cf4dd62482b6dd049d82c509886c904303","lessThan":"4c92afb4c143526d340545ca581e88e6952ea511","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/gpu/drm/xe/xe_migrate.c","drivers/gpu/drm/xe/xe_migrate.h","drivers/gpu/drm/xe/xe_sriov_vf_ccs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.","versionType":"semver","status":"unaffected"},{"version":"7.2-rc5","lessThanOrEqual":"","versionType":"original_commit_for_fix","status":"unaffected"}]}]

Quick Info

CVE Dictionary Entry:
CVE-2026-68305
NVD Published Date:
08/10/2026
NVD Last Modified:
08/17/2026
Source:
kernel.org

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National Vulnerability Database

National Vulnerability Database

CVE-2026-68305 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Change History

CVE Modified by kernel.org 8/17/2026 1:18:33 AM

CVE Modified by kernel.org 8/13/2026 7:17:29 PM

New CVE Received from kernel.org 8/10/2026 9:20:20 AM

Quick Info