CVE-2024-26940

CVE Details

Release Date:

2024-05-01

Description

In the Linux kernel, the following vulnerability has been resolved:\ndrm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed\nThe driver creates /sys/kernel/debug/dri/0/mob_ttm even when the\ncorresponding ttm_resource_manager is not allocated.\nThis leads to a crash when trying to read from this file.\nAdd a check to create mob_ttm, system_mob_ttm, and gmr_ttm debug file\nonly when the corresponding ttm_resource_manager is allocated.\ncrash> bt\nPID: 3133409 TASK: ffff8fe4834a5000 CPU: 3 COMMAND: 'grep'\n#0 [ffffb954506b3b20] machine_kexec at ffffffffb2a6bec3\n#1 [ffffb954506b3b78] __crash_kexec at ffffffffb2bb598a\n#2 [ffffb954506b3c38] crash_kexec at ffffffffb2bb68c1\n#3 [ffffb954506b3c50] oops_end at ffffffffb2a2a9b1\n#4 [ffffb954506b3c70] no_context at ffffffffb2a7e913\n#5 [ffffb954506b3cc8] __bad_area_nosemaphore at ffffffffb2a7ec8c\n#6 [ffffb954506b3d10] do_page_fault at ffffffffb2a7f887\n#7 [ffffb954506b3d40] page_fault at ffffffffb360116e\n[exception RIP: ttm_resource_manager_debug+0x11]\nRIP: ffffffffc04afd11 RSP: ffffb954506b3df0 RFLAGS: 00010246\nRAX: ffff8fe41a6d1200 RBX: 0000000000000000 RCX: 0000000000000940\nRDX: 0000000000000000 RSI: ffffffffc04b4338 RDI: 0000000000000000\nRBP: ffffb954506b3e08 R8: ffff8fee3ffad000 R9: 0000000000000000\nR10: ffff8fe41a76a000 R11: 0000000000000001 R12: 00000000ffffffff\nR13: 0000000000000001 R14: ffff8fe5bb6f3900 R15: ffff8fe41a6d1200\nORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\n#8 [ffffb954506b3e00] ttm_resource_manager_show at ffffffffc04afde7 [ttm]\n#9 [ffffb954506b3e30] seq_read at ffffffffb2d8f9f3\nRIP: 00007f4c4eda8985 RSP: 00007ffdbba9e9f8 RFLAGS: 00000246\nRAX: ffffffffffffffda RBX: 000000000037e000 RCX: 00007f4c4eda8985\nRDX: 000000000037e000 RSI: 00007f4c41573000 RDI: 0000000000000003\nRBP: 000000000037e000 R8: 0000000000000000 R9: 000000000037fe30\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007f4c41573000\nR13: 0000000000000003 R14: 00007f4c41572010 R15: 0000000000000003\nORIG_RAX: 0000000000000000 CS: 0033 SS: 002b

See more information about CVE-2024-26940 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14