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CVE-2026-98508: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: drm/virtio: fix NULL pointer dereference on fence allocation failure virtio_gpu_fence_alloc() can fail due to memory pressure and return NULL, but its caller like virtio_gpu_init_submit() never checks it. Later, virtio_gpu_init_submit() passes the NULL fence to virtio_gpu_fence_event_create(), which unconditionally dereferences it. Found when fuzzing the virtio driver with Syzkaller: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 1 UID: 0 PID: 9991 Comm: syz.0.121 Not tainted 7.2.0 #4 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 RIP: 0010:virtio_gpu_fence_event_create drivers/gpu/drm/virtio/virtgpu_submit.c:295 [inline] RIP: 0010:virtio_gpu_init_submit drivers/gpu/drm/virtio/virtgpu_submit.c:398 [inline] RIP: 0010:virtio_gpu_execbuffer_ioctl+0xc78/0x1aa0 drivers/gpu/drm/virtio/virtgpu_submit.c:505 Code: 85 ed 0f 85 21 09 00 00 e8 05 5a c9 fb 48 8b 44 24 10 48 8d b8 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 9a 0d 00 00 48 8b 44 24 10 4c 89 b0 90 00 00 00 RSP: 0018:ffffc900039dfad0 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: ffffc900039dfdd8 RCX: ffffffff85f6fd3d RDX: 0000000000000012 RSI: ffffffff85f6fd4b RDI: 0000000000000090 RBP: 0000000000000000 R0virtio_gpu_virgl_process_cmd: ctrl 0x102, error 0x1203 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880132c4000 R13: 0000000000000000 R14: ffff888073b6c700 R15: 000000000000003b FS: 00007fab480b96c0(0000) GS:ffff8880eb6e9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007effbf5e55a8 CR3: 0000000048d19000 CR4: 0000000000350ef0 Call Trace: <TASK> drm_ioctl_kernel+0x1f4/0x3e0 drivers/gpu/drm/drm_ioctl.c:817 drm_ioctl+0x5f

    Засегнати продукти

    • Linux Linux: 70d1ace56db6c79d39dbe9c0d5244452b67e2fde преди 9571ab7493561afb4624d69572a7ebb67d76d10f; 70d1ace56db6c79d39dbe9c0d5244452b67e2fde преди a8b83ed4a4b1d04c756f53e375e86d3881f66e72; 70d1ace56db6c79d39dbe9c0d5244452b67e2fde преди f2f1683955b95c9b958069da3050f7e8e129ff88; 70d1ace56db6c79d39dbe9c0d5244452b67e2fde преди ecced0076b700b5896e52af10d0776be8be36b0d; 70d1ace56db6c79d39dbe9c0d5244452b67e2fde преди 846b3c64fe3e77d9db20a7e3e62dbbb637c773e1; 98d3e7c5f757577394f036e0301db9e570342566; 4037dcd70c3335600a2a95ec6229d70859bd37a1; 6.1.54 преди 6.2; 6.5.4 преди 6.6
    • Linux Linux: 6.6; преди 6.6; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; от 7.3 нататък

    История

    • 18 октомври 2026 Публикувано

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    Първоизточници

    CVE-2026-98508: Linux | freedomonline.bg