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CVE-2026-99106— drm/amdgpu: free the userptr ranges when a CS fails after parser_bos

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： drm/amdgpu：在解析器提交（CS）失败后释放 userptr 范围 会为缓冲区对象（BO）列表中的每个 userptr 条目分配一个 HMM 范围，并查找对应的用户页。这些范围仅在 自身失败，或在 中通过通知器锁进行检查时才会被释放。然而，如果 、 、 或 的早期阶段发生失败，则没有任何代码会释放这些范围： 和 均未处理 字段。 因此，每次此类命令提交（CS）失败时，都会导致以下资源泄漏： HMM 范围本身； 该范围持有的 数组（每页 userptr BO 占用

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1069.001 · Local Groups

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux fec8fdb54e8f74d88951c9f998f47bf4f2031fe0< 6ac46ae5ac561d4fc7d4246ad83d71bed0d9af9a affected
fec8fdb54e8f74d88951c9f998f47bf4f2031fe0< 2d9d24385201f476a2f754495b71bbac5ba6ea7b affected
fec8fdb54e8f74d88951c9f998f47bf4f2031fe0< 1b4da805a0ba354a549ce07459c871c17dd94fe0 affected
6.2 affected
< 6.2 unaffected
6.18.59≤ 6.18.* unaffected
7.2.13≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-99106

Vulnerability Information
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Vulnerability Title
drm/amdgpu: free the userptr ranges when a CS fails after parser_bos
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: free the userptr ranges when a CS fails after parser_bos amdgpu_cs_parser_bos() allocates an HMM range for every userptr entry of the BO list and looks up the user pages. Those ranges are only freed when amdgpu_cs_parser_bos() itself fails or when amdgpu_cs_submit() checks them under the notifier lock. If amdgpu_cs_patch_jobs(), amdgpu_cs_vm_handling(), amdgpu_cs_sync_rings() or the early part of amdgpu_cs_submit() fails, nothing frees them: neither amdgpu_cs_parser_fini() nor amdgpu_bo_list_free() touch e->range. Each such CS then leaks the range, its hmm_pfns array (8 bytes per page of the userptr BO) and the BO reference the range holds. An IB on a ring that patches the CS in place (e.g. VCN) with an unmapped va_start fails in amdgpu_cs_patch_ibs() and takes this path. Free the ranges on those error paths. Ranges amdgpu_cs_submit() already dropped are NULL, so freeing them again is a no-op. (cherry picked from commit c52a9542ed7cfd527feb938bd0accada2ac8d267)
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux fec8fdb54e8f74d88951c9f998f47bf4f2031fe0 ~ 6ac46ae5ac561d4fc7d4246ad83d71bed0d9af9a -
Linux Linux 6.2 -

II. Public POCs for CVE-2026-99106

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III. Intelligence Information for CVE-2026-99106

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Patches & Fixes for CVE-2026-99106 (3)

Same Patch Batch · Linux · 2026-10-28 · 117 CVEs total

CVE-2026-99144 sched_ext: Fix use-after-free of a destroyed user DSQ by a deferred reenqueue
CVE-2026-99130 io_uring/cancel: don't spin on local work the task can't run
CVE-2026-99131 xfs: fix capability check in xfs
CVE-2026-99133 net/iucv: fix the recvmsg window update
CVE-2026-99132 xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf
CVE-2026-99134 mac802154: fix data race and NULL deref on local->assoc_dev
CVE-2026-99135 dm-integrity: fix infinite loop on discard with large tag size
CVE-2026-99137 cifs: don't update i_size in cifs_do_truncate without a cached handle
CVE-2026-99136 dm-crypt: fix a tiny race condition in crypt_dec_pending
CVE-2026-99138 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CC_INFO)
CVE-2026-99140 tracing: Fix hist trigger timestamps for buffered events
CVE-2026-99139 tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION)
CVE-2026-99141 tracing: Fix crash in print_graph_function_event()
CVE-2026-99142 tracing: Check operator stack capacity before pushing
CVE-2026-99143 tracing: Keep the predicate limit separate from program capacity
CVE-2026-99156 scsi: st: Fix use-after-free race between st_remove() and st_open()
CVE-2026-99153 scsi: libiscsi: Validate the ITT reflected in a Reject PDU
CVE-2026-99152 scsi: libiscsi: Validate the task named by a management response
CVE-2026-99154 scsi: libiscsi: Reject a negative task index from parse_pdu_itt
CVE-2026-99151 drm/amd/display: Fix NULL sink dereference in USB4 bandwidth functions

Showing top 20 of 117 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux