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CVE-2025-40353— arm64: mte: Do not warn if the page is already tagged in copy_highpage()

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copy_highpage中未正确处理已标记页面，可能导致警告信息。

AI Predicted 5.0 Difficulty: Theoretical EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 060913999d7a9e50c283fdb15253fc27974ddadc< 5ff5765a1fc526f07d3bbaedb061d970eb13bcf4 affected
060913999d7a9e50c283fdb15253fc27974ddadc< 0bbf3fc6e9211fce9889fe8efbb89c220504d617 affected
060913999d7a9e50c283fdb15253fc27974ddadc< b98c94eed4a975e0c80b7e90a649a46967376f58 affected
6.11 affected
< 6.11 unaffected
6.12.56≤ 6.12.* unaffected
6.17.6≤ 6.17.* unaffected
6.18≤ * unaffected
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I. Basic Information for CVE-2025-40353

Vulnerability Information
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Vulnerability Title
arm64: mte: Do not warn if the page is already tagged in copy_highpage()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: arm64: mte: Do not warn if the page is already tagged in copy_highpage() The arm64 copy_highpage() assumes that the destination page is newly allocated and not MTE-tagged (PG_mte_tagged unset) and warns accordingly. However, following commit 060913999d7a ("mm: migrate: support poisoned recover from migrate folio"), folio_mc_copy() is called before __folio_migrate_mapping(). If the latter fails (-EAGAIN), the copy will be done again to the same destination page. Since copy_highpage() already set the PG_mte_tagged flag, this second copy will warn. Replace the WARN_ON_ONCE(page already tagged) in the arm64 copy_highpage() with a comment.
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copy_highpage中未正确处理已标记页面，可能导致警告信息。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 060913999d7a9e50c283fdb15253fc27974ddadc ~ 5ff5765a1fc526f07d3bbaedb061d970eb13bcf4 -
Linux Linux 6.11 -

II. Public POCs for CVE-2025-40353

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III. Intelligence Information for CVE-2025-40353

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Other References for CVE-2025-40353 (3)

Same Patch Batch · Linux · 2025-12-16 · 157 CVEs total

CVE-2025-68263 9.8 CRITICAL ksmbd: ipc: fix use-after-free in ipc_msg_send_request
CVE-2025-68284 9.8 CRITICAL libceph: prevent potential out-of-bounds writes in handle_auth_session_key()
CVE-2025-68315 9.8 CRITICAL f2fs: fix to detect potential corrupted nid in free_nid_list
CVE-2025-68192 9.8 CRITICAL net: usb: qmi_wwan: initialize MAC header offset in qmimux_rx_fixup
CVE-2025-68301 9.8 CRITICAL net: atlantic: fix fragment overflow handling in RX path
CVE-2025-68285 9.8 CRITICAL libceph: fix potential use-after-free in have_mon_and_osd_map()
CVE-2025-40350 9.8 CRITICAL net/mlx5e: RX, Fix generating skb from non-linear xdp_buff for striding RQ
CVE-2025-68256 8.8 HIGH staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
CVE-2025-68314 8.8 HIGH drm/msm: make sure last_fence is always updated
CVE-2025-68304 8.8 HIGH Bluetooth: hci_core: lookup hci_conn on RX path on protocol side
CVE-2025-68255 8.8 HIGH staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing
CVE-2025-68226 8.8 HIGH smb: client: fix incomplete backport in cfids_invalidation_worker()
CVE-2025-40362 8.8 HIGH ceph: fix multifs mds auth caps issue
CVE-2025-68250 8.2 HIGH hung_task: fix warnings caused by unaligned lock pointers
CVE-2025-68207 7.8 HIGH drm/xe/guc: Synchronize Dead CT worker with unbind
CVE-2025-68265 7.8 HIGH nvme: fix admin request_queue lifetime
CVE-2025-68179 7.8 HIGH s390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
CVE-2025-68189 7.8 HIGH drm/msm: Fix GEM free for imported dma-bufs
CVE-2025-68181 7.8 HIGH drm/radeon: Remove calls to drm_put_dev()
CVE-2025-68183 7.8 HIGH ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr

Showing top 20 of 157 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40353

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