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CVE-2026-99145— drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change

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/xe：当处于可清除状态变更时，不要为已固定的 BO 转移 shrinker 页面 已固定（pinned）的 BO（Buffer Object）在固定时，其页面会从 shrinker 的可收缩（shrinkable）/可清除（purgeable）计数中移除；而在取消固定时，则会根据该 BO 当时的可清除状态将页面重新加回计数中。 然而， 函数会无条件地在可收缩计数和可清除计数之间转移页面。如果某个已固定的 BO 的可清除状态发生变化（例如，用户空间通过 对某个 V

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1068.002

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 536a2ead3a8f2048643da3e8340a4d73fdf71903< 135e998dd1e66b8854db7bd356b6563baf8b9d51 affected
536a2ead3a8f2048643da3e8340a4d73fdf71903< ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f affected
7.1 affected
< 7.1 unaffected
7.2.13≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-99145

Vulnerability Information
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Vulnerability Title
drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change Pinned bos have their pages removed from the shrinker's shrinkable / purgeable counts on pin, and added back on unpin according to the bo's purgeable state at that time. However, xe_bo_set_purgeable_shrinker() unconditionally transfers pages between the shrinkable and purgeable counts. If the purgeable state of a pinned bo changes, for example by userspace madvising DONTNEED on a VMA of a bo that is also pinned as a scanout buffer, this underflows one count and, after unpin, leaves the other one permanently inflated. Only update the purgeable flag for pinned bos, and leave the page accounting to unpin. (cherry picked from commit afe6bc012034123fd838328668e609bf57e46bd3)
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 536a2ead3a8f2048643da3e8340a4d73fdf71903 ~ 135e998dd1e66b8854db7bd356b6563baf8b9d51 -
Linux Linux 7.1 -

II. Public POCs for CVE-2026-99145

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III. Intelligence Information for CVE-2026-99145

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Patches & Fixes for CVE-2026-99145 (1)

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