CVE-2025-21880— drm/xe/userptr: fix EFAULT handling
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.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于drm/xe未正确处理EFAULT，可能导致用户ptr vma残留。
Possible ATT&CK Techniques 1 AI
T1055 · Process InjectionAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 521db22a1d70dbc596a07544a738416025b1b63c< daad16d0a538fa938e344fd83927bbcfcd8a66ec |
affected |
521db22a1d70dbc596a07544a738416025b1b63c< 51cc278f8ffacd5f9dc7d13191b81b912829db59 |
affected | ||
521db22a1d70dbc596a07544a738416025b1b63c< a9f4fa3a7efa65615ff7db13023ac84516e99e21 |
affected | ||
6.10 |
affected | ||
< 6.10 |
unaffected | ||
6.12.18≤ 6.12.* |
unaffected | ||
6.13.6≤ 6.13.* |
unaffected | ||
6.14≤ * |
unaffected |
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I. Basic Information for CVE-2025-21880
Vulnerability Information
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Vulnerability Title
drm/xe/userptr: fix EFAULT handling
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
drm/xe/userptr: fix EFAULT handling
Currently we treat EFAULT from hmm_range_fault() as a non-fatal error
when called from xe_vm_userptr_pin() with the idea that we want to avoid
killing the entire vm and chucking an error, under the assumption that
the user just did an unmap or something, and has no intention of
actually touching that memory from the GPU. At this point we have
already zapped the PTEs so any access should generate a page fault, and
if the pin fails there also it will then become fatal.
However it looks like it's possible for the userptr vma to still be on
the rebind list in preempt_rebind_work_func(), if we had to retry the
pin again due to something happening in the caller before we did the
rebind step, but in the meantime needing to re-validate the userptr and
this time hitting the EFAULT.
This explains an internal user report of hitting:
[ 191.738349] WARNING: CPU: 1 PID: 157 at drivers/gpu/drm/xe/xe_res_cursor.h:158 xe_pt_stage_bind.constprop.0+0x60a/0x6b0 [xe]
[ 191.738551] Workqueue: xe-ordered-wq preempt_rebind_work_func [xe]
[ 191.738616] RIP: 0010:xe_pt_stage_bind.constprop.0+0x60a/0x6b0 [xe]
[ 191.738690] Call Trace:
[ 191.738692] <TASK>
[ 191.738694] ? show_regs+0x69/0x80
[ 191.738698] ? __warn+0x93/0x1a0
[ 191.738703] ? xe_pt_stage_bind.constprop.0+0x60a/0x6b0 [xe]
[ 191.738759] ? report_bug+0x18f/0x1a0
[ 191.738764] ? handle_bug+0x63/0xa0
[ 191.738767] ? exc_invalid_op+0x19/0x70
[ 191.738770] ? asm_exc_invalid_op+0x1b/0x20
[ 191.738777] ? xe_pt_stage_bind.constprop.0+0x60a/0x6b0 [xe]
[ 191.738834] ? ret_from_fork_asm+0x1a/0x30
[ 191.738849] bind_op_prepare+0x105/0x7b0 [xe]
[ 191.738906] ? dma_resv_reserve_fences+0x301/0x380
[ 191.738912] xe_pt_update_ops_prepare+0x28c/0x4b0 [xe]
[ 191.738966] ? kmemleak_alloc+0x4b/0x80
[ 191.738973] ops_execute+0x188/0x9d0 [xe]
[ 191.739036] xe_vm_rebind+0x4ce/0x5a0 [xe]
[ 191.739098] ? trace_hardirqs_on+0x4d/0x60
[ 191.739112] preempt_rebind_work_func+0x76f/0xd00 [xe]
Followed by NPD, when running some workload, since the sg was never
actually populated but the vma is still marked for rebind when it should
be skipped for this special EFAULT case. This is confirmed to fix the
user report.
v2 (MattB):
- Move earlier.
v3 (MattB):
- Update the commit message to make it clear that this indeed fixes the
issue.
(cherry picked from commit 6b93cb98910c826c2e2004942f8b060311e43618)
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于drm/xe未正确处理EFAULT，可能导致用户ptr vma残留。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-21880
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2025-21880 (3)
Same Patch Batch · Linux · 2025-03-27 · 124 CVEs total
| CVE-2023-53006 | 9.8 CRITICAL | cifs: Fix oops due to uncleared server->smbd_conn in reconnect |
| CVE-2025-21876 | 8.8 HIGH | iommu/vt-d: Fix suspicious RCU usage |
| CVE-2025-21890 | 8.2 HIGH | idpf: fix checksums set in idpf_rx_rsc() |
| CVE-2025-21887 | 7.8 HIGH | ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up |
| CVE-2023-53033 | 7.8 HIGH | netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits |
| CVE-2025-21889 | 7.8 HIGH | perf/core: Add RCU read lock protection to perf_iterate_ctx() |
| CVE-2023-52930 | 7.8 HIGH | drm/i915: Fix potential bit_17 double-free |
| CVE-2023-52931 | 7.8 HIGH | drm/i915: Avoid potential vm use-after-free |
| CVE-2023-52934 | 7.8 HIGH | mm/MADV_COLLAPSE: catch !none !huge !bad pmd lookups |
| CVE-2023-52935 | 7.8 HIGH | mm/khugepaged: fix ->anon_vma race |
| CVE-2023-53009 | 7.8 HIGH | drm/amdkfd: Add sync after creating vram bo |
| CVE-2023-52999 | 7.8 HIGH | net: fix UaF in netns ops registration error path |
| CVE-2023-52973 | 7.8 HIGH | vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF |
| CVE-2023-52983 | 7.8 HIGH | block, bfq: fix uaf for bfqq in bic_set_bfqq() |
| CVE-2023-52981 | 7.8 HIGH | drm/i915: Fix request ref counting during error capture & debugfs dump |
| CVE-2023-52975 | 7.8 HIGH | scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress |
| CVE-2023-52974 | 7.8 HIGH | scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress |
| CVE-2022-49760 | 7.8 HIGH | mm/hugetlb: fix PTE marker handling in hugetlb_change_protection() |
| CVE-2025-21867 | 7.8 HIGH | bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() |
| CVE-2023-52988 | 7.8 HIGH | ALSA: hda/via: Avoid potential array out-of-bound in add_secret_dac_path() |
Showing top 20 of 124 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
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CVE-2026-99087
dm-integrity: fix NULL pointer dereference when the 'R' flag -
CVE-2026-99086
dm-integrity: validate the superblock on resume -
CVE-2026-99084
readdir: take no inode lock on an immutable directory -
CVE-2026-99085
sched_ext: Fix CPU hotplug hang when a dying CPU's tasks sit -
CVE-2026-99083
ksmbd: fix heap out-of-bounds write in krb5_authenticate()
V. Comments for CVE-2025-21880
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