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CVE-2026-63884— Linux kernel 安全漏洞

一分钟漏洞结论

影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于drm/i915中TTM对象清理时存在潜在的释放后重用漏洞，可能导致文件指针解引用错误。

CVSS 7.8 · High EPSS 0.18% · P7

影响版本矩阵 14

厂商产品 版本范围状态
Linux Linux 7ae034590ceaefd4d37465e3434877acfbadf411< df73f3bc731af1c39ac5405bc59c4e7c6f8e9117 affected
7ae034590ceaefd4d37465e3434877acfbadf411< 28b22dbaf407598cb3bb1d2c586a6f8018690ac2 affected
7ae034590ceaefd4d37465e3434877acfbadf411< 073bcbc95e9648c976da1654c7590a8d6ee12c2d affected
7ae034590ceaefd4d37465e3434877acfbadf411< c9ae7e7e3bc98615364313b08d7acea5239ded0b affected
7ae034590ceaefd4d37465e3434877acfbadf411< a29654d451bbffe63d584a4cf64ad0efce6bcf1c affected
7ae034590ceaefd4d37465e3434877acfbadf411< 5c4063c87a619e4df954c179d24628636f5db15f affected
5.17 affected
< 5.17 unaffected
… +6 条更多
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一、 漏洞 CVE-2026-63884 基础信息

漏洞信息
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Vulnerability Title
drm/i915: Fix potential UAF in TTM object purge
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/i915: Fix potential UAF in TTM object purge TLDR: The bo->ttm object might be changed by calling ttm_bo_validate(), move casting it to an i915_tt object later to actually get the right pointer. A user reported hitting the following bug under heavy use on DG2: [26620.095550] Oops: general protection fault, probably for non-canonical address 0xa56b6b6b6b6b6b8b: 0000 1 SMP NOPTI [26620.095556] CPU: 2 UID: 0 PID: 631 Comm: Xorg Not tainted 6.18.8 #1 PREEMPT(lazy) [26620.095558] Hardware name: ASRock B850M Steel Legend WiFi/B850M Steel Legend WiFi, BIOS 3.50 09/18/2025 [26620.095559] RIP: 0010:i915_ttm_purge+0x84/0x100 [i915] [26620.095604] Code: 00 00 00 48 8d 54 24 10 48 89 e6 48 89 fb e8 83 aa ae ff 85 c0 75 6f 48 83 bb a8 01 00 00 00 74 2c 48 8b 45 78 48 85 c0 74 23 <48> 8b 78 20 48 c7 c2 ff ff ff ff 31 f6 e8 7a 73 e3 e0 48 8b 7d 78 [26620.095605] RSP: 0018:ffffc90005fd7430 EFLAGS: 00010282 [26620.095607] RAX: a56b6b6b6b6b6b6b RBX: ffff8881f46c3dc0 RCX: 0000000000000000 [26620.095608] RDX: 0000000000000000 RSI: 0000000000000246 RDI: 00000000ffffffff [26620.095609] RBP: ffff888289610f00 R08: 0000000000000001 R09: ffff88823b022000 [26620.095609] R10: ffff888103029b28 R11: ffff8881fc7f3800 R12: ffff88810b6150d0 [26620.095609] R13: ffff888289610f00 R14: 0000000000000000 R15: ffff8881f46c3dc0 [26620.095610] FS: 00007f1004d86900(0000) GS:ffff88901c858000(0000) knlGS:0000000000000000 [26620.095611] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [26620.095611] CR2: 00007f0fdf489000 CR3: 000000035b0c1000 CR4: 0000000000750ef0 [26620.095612] PKRU: 55555554 [26620.095612] Call Trace: [26620.095615] <TASK> [26620.095615] i915_ttm_move+0x2b9/0x420 [i915] [26620.095642] ? ttm_tt_init+0x65/0x80 [ttm] [26620.095644] ? i915_ttm_tt_create+0xc6/0x150 [i915] [26620.095667] ttm_bo_handle_move_mem+0xb6/0x160 [ttm] [26620.095669] ttm_bo_evict+0x100/0x150 [ttm] [26620.095671] ? preempt_count_add+0x64/0xa0 [26620.095673] ? _raw_spin_lock+0xe/0x30 [26620.095675] ? _raw_spin_unlock+0xd/0x30 [26620.095675] ? i915_gem_object_evictable+0xb7/0xd0 [i915] [26620.095704] ttm_bo_evict_cb+0x6e/0xd0 [ttm] [26620.095705] ttm_lru_walk_for_evict+0xa6/0x200 [ttm] [26620.095708] ttm_bo_alloc_resource+0x185/0x4f0 [ttm] [26620.095709] ? init_object+0x62/0xd0 [26620.095712] ttm_bo_validate+0x7a/0x180 [ttm] [26620.095713] ? _raw_spin_unlock_irqrestore+0x16/0x30 [26620.095714] __i915_ttm_get_pages+0xb0/0x170 [i915] [26620.095737] i915_ttm_get_pages+0x9f/0x150 [i915] [26620.095759] ? i915_gem_do_execbuffer+0xedc/0x2b40 [i915] [26620.095786] ? alloc_debug_processing+0xd0/0x100 [26620.095787] ? _raw_spin_unlock_irqrestore+0x16/0x30 [26620.095788] ? i915_vma_instance+0xa0/0x4e0 [i915] [26620.095822] __i915_gem_object_get_pages+0x2f/0x40 [i915] [26620.095848] i915_vma_pin_ww+0x706/0x980 [i915] [26620.095875] ? i915_gem_do_execbuffer+0xedc/0x2b40 [i915] [26620.095904] eb_validate_vmas+0x170/0xa00 [i915] [26620.095930] i915_gem_do_execbuffer+0x1201/0x2b40 [i915] [26620.095953] ? alloc_debug_processing+0xd0/0x100 [26620.095954] ? _raw_spin_unlock_irqrestore+0x16/0x30 [26620.095955] ? i915_gem_execbuffer2_ioctl+0xc9/0x240 [i915] [26620.095977] ? __wake_up_sync_key+0x32/0x50 [26620.095979] ? i915_gem_execbuffer2_ioctl+0xc9/0x240 [i915] [26620.096001] ? __slab_alloc.isra.0+0x67/0xc0 [26620.096003] i915_gem_execbuffer2_ioctl+0x11a/0x240 [i915] Results from decode_stacktrace.sh pointed to dereference of a file pointer field of a i915 TTM page vector container associated with an object being purged on eviction. That path is taken when the object is marked as no longer needed. Code analysis revealed a possibility of the i915 TTM page vector container being replaced with a new instance inside a function that purges content of the object, should it be still busy. That function is called, indirectly via a more general function that changes the object's placement and caching policy, ---truncated---
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于drm/i915中TTM对象清理时存在潜在的释放后重用漏洞，可能导致文件指针解引用错误。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
Linux Linux 7ae034590ceaefd4d37465e3434877acfbadf411 ~ df73f3bc731af1c39ac5405bc59c4e7c6f8e9117 -
Linux Linux 5.17 -

二、漏洞 CVE-2026-63884 的公开POC

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三、漏洞 CVE-2026-63884 的情报信息

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CVE-2026-63884 补丁与修复 (4)

同批安全公告 · Linux · 2026-07-19 · 共 429 条

CVE-2026-63795 10.0 CRITICAL Linux kernel 安全漏洞
CVE-2026-64091 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63984 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-64025 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63922 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63979 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-64056 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63800 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63978 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-64055 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63808 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-64033 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63888 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63887 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-64113 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63825 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63924 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-64125 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-64160 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-63857 9.8 CRITICAL Linux kernel 安全漏洞

显示前 20 条，共 429 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-63884

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