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CVE-2026-99147— drm/exec: don't immediately add prelocked obj to array of locked objs

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/exec：不要立即将预锁定对象加入已锁定对象数组 当检测到资源争用时，drm_exec 对象会获取争用对象的引用，解锁所有其他对象，并在执行其他操作之前先对该争用对象进行预锁定。 问题在于：该预锁定对象可能即将被销毁，而此时 drm_exec 正持有对该对象的最后一个引用。 因此，该预锁定对象永远不会再次被显式锁定，系统也从未为其预留 dma_fence 对象的槽位。 若驱动程序随后调用 drm_exec_for_each_locked_object() 向所有

AI Predicted 8.8 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 09593216bff15866f95c8ad406cb7fdcec1ee40a< 96d9996e5dbcfabed052c0d9377a382c95fed607 affected
09593216bff15866f95c8ad406cb7fdcec1ee40a< 7a10cd79c4d9a90334fece32fef3a8e5b1a9727b affected
09593216bff15866f95c8ad406cb7fdcec1ee40a< 26401a4999f1596a515b2e704e7066ac09306488 affected
6.6 affected
< 6.6 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-2026-99147

Vulnerability Information
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Vulnerability Title
drm/exec: don't immediately add prelocked obj to array of locked objs
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/exec: don't immediately add prelocked obj to array of locked objs When a contention is detected the drm_exec object grabs a reference to the contended object, unlocks all other objects and pre-locks the contended one before anything else. The problem is that it is possible that this pre-locked object was about to be destroyed and drm_exec is now holding the last reference to it. So we never actually see this pre-locked object again to be explicitly locked and so also never reserve a slot for a dma_fence object on it. Should the driver now use drm_exec_for_each_locked_object() to add a new fence to all locked objects we eventually see a warning or even a BUG_ON() to prevent random memory corruption. Fix this by keeping the prelocked object out of the array of locked objs until it was explicitly mentioned by the driver again. If the prelocked object is never mentioned again by the driver just unlock and drop the reference at the end of the locking loop.
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 09593216bff15866f95c8ad406cb7fdcec1ee40a ~ 96d9996e5dbcfabed052c0d9377a382c95fed607 -
Linux Linux 6.6 -

II. Public POCs for CVE-2026-99147

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III. Intelligence Information for CVE-2026-99147

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Patches & Fixes for CVE-2026-99147 (2)

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

CVE-2026-99143 tracing: Keep the predicate limit separate from program capacity
CVE-2026-99129 selinux: fix BPF token permission checks
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-2026-99156 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