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CVE-2026-89800— drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE

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/nouveau/uvmm：在执行 OP_UNMAP_SPARSE 失败回滚时清除 dirty 标志 成功的 OP_UNMAP_SPARSE 操作会通过 将对应区域标记为脏（dirty），并将清理工作延迟到 处理，但它并未将该区域从 树中移除。 如果作业中后续的某个操作失败，回滚（unwind）路径既没有清除 （该标志只在一处被设置，却从未被清除），又将 设为 ，导致清理阶段跳过该区域的拆除（teardown）。结果是该区域以“脏”状态残留在树中，且其完成事件（c

AI Predicted 5.0 Difficulty: Hard EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux b88baab828713ce0b49b185444b2ee83bed373a8< a129b2b875c148aba233ace8447a0c36ca3bae07 affected
b88baab828713ce0b49b185444b2ee83bed373a8< 196ce9e5e93202da097062be24e404984dbc5ac2 affected
b88baab828713ce0b49b185444b2ee83bed373a8< 1101cbfe7f342e5eaaf7444965d4f1215abdac4c affected
b88baab828713ce0b49b185444b2ee83bed373a8< c60033c172420179b7bbb3d1f843f8dc90164dc5 affected
b88baab828713ce0b49b185444b2ee83bed373a8< 38a62306c4266bcb3cd89e33c7111ee33096ebb3 affected
6.6 affected
< 6.6 unaffected
6.6.157≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-89800

Vulnerability Information
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Vulnerability Title
drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE A successful OP_UNMAP_SPARSE marks its region dirty with nouveau_uvma_region_dirty() and defers the teardown to nouveau_uvmm_bind_job_cleanup(); it does not remove the region from uvmm->region_mt. If a later op in the job fails, the unwind path never clears reg->dirty (set in one place, cleared nowhere) and sets op->reg = NULL, so cleanup skips the teardown. The region is left in the tree with dirty set and its completion never signalled. Later binds over that range then fail permanently -- -ENOENT or -EINVAL from the dirty checks, or an unkillable wait_for_completion() in bind_validate_region() -- for the lifetime of the uvmm. Clear reg->dirty when the unwind reverts the sparse unmap, restoring the region to the state it was found in.
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 b88baab828713ce0b49b185444b2ee83bed373a8 ~ a129b2b875c148aba233ace8447a0c36ca3bae07 -
Linux Linux 6.6 -

II. Public POCs for CVE-2026-89800

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III. Intelligence Information for CVE-2026-89800

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Other References for CVE-2026-89800 (5)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89800

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