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CVE-2025-68239— binfmt_misc: restore write access before closing files opened by open_exec()

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bm_register_write未恢复文件写权限，可能导致后续写操作失败。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 26

VendorProduct Version RangeStatus
Linux Linux e7850f4d844e0acfac7e570af611d89deade3146< 54274ff90488b6c0f595a6518faed3cf0bc966eb affected
e7850f4d844e0acfac7e570af611d89deade3146< 480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f affected
e7850f4d844e0acfac7e570af611d89deade3146< fbab8c08e1a6dbaef81e22d672a7647553101d16 affected
e7850f4d844e0acfac7e570af611d89deade3146< 6cce7bc7fac8471c832696720d9c8f2a976d9c54 affected
e7850f4d844e0acfac7e570af611d89deade3146< e785f552ab04dbca01d31f0334f4561240b04459 affected
e7850f4d844e0acfac7e570af611d89deade3146< 90f601b497d76f40fa66795c3ecf625b6aced9fd affected
467a50d5db7deaf656e18a1f633be9ecd94b393a affected
4a8b4124ea4156ca52918b66c750a69c6d932aa5 affected
… +18 more rows
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I. Basic Information for CVE-2025-68239

Vulnerability Information
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Vulnerability Title
binfmt_misc: restore write access before closing files opened by open_exec()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: restore write access before closing files opened by open_exec() bm_register_write() opens an executable file using open_exec(), which internally calls do_open_execat() and denies write access on the file to avoid modification while it is being executed. However, when an error occurs, bm_register_write() closes the file using filp_close() directly. This does not restore the write permission, which may cause subsequent write operations on the same file to fail. Fix this by calling exe_file_allow_write_access() before filp_close() to restore the write permission properly.
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bm_register_write未恢复文件写权限，可能导致后续写操作失败。
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 e7850f4d844e0acfac7e570af611d89deade3146 ~ 54274ff90488b6c0f595a6518faed3cf0bc966eb -
Linux Linux 5.12 -

II. Public POCs for CVE-2025-68239

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III. Intelligence Information for CVE-2025-68239

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Patches & Fixes for CVE-2025-68239 (3)

Other References for CVE-2025-68239 (2)

Same Patch Batch · Linux · 2025-12-16 · 156 CVEs total

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-2025-68263 9.8 CRITICAL ksmbd: ipc: fix use-after-free in ipc_msg_send_request
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-2025-68284 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-2025-68255 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-2025-68256 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-2025-40362 8.8 HIGH ceph: fix multifs mds auth caps issue
CVE-2025-68304 8.8 HIGH Bluetooth: hci_core: lookup hci_conn on RX path on protocol side
CVE-2025-68250 8.2 HIGH hung_task: fix warnings caused by unaligned lock pointers
CVE-2025-68181 7.8 HIGH drm/radeon: Remove calls to drm_put_dev()
CVE-2025-68179 7.8 HIGH s390: Disable ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
CVE-2025-68175 7.8 HIGH media: nxp: imx8-isi: Fix streaming cleanup on release
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-2025-68208 7.8 HIGH bpf: account for current allocated stack depth in widen_imprecise_scalars()

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68239

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