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CVE-2025-68239

UnknownEPSS 0.16%

Last modified

CVE-2025-68239 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.16%

6.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= e7850f4d844e0acfac7e570af611d89deade3146, < 54274ff90488b6c0f595a6518faed3cf0bc966eb; >= e7850f4d844e0acfac7e570af611d89deade3146, < 480ac88431703f2adbb8e6b5bd73c3f3cf9f3d7f; >= e7850f4d844e0acfac7e570af611d89deade3146, < fbab8c08e1a6dbaef81e22d672a7647553101d16; >= e7850f4d844e0acfac7e570af611d89deade3146, < 6cce7bc7fac8471c832696720d9c8f2a976d9c54; >= e7850f4d844e0acfac7e570af611d89deade3146, < e785f552ab04dbca01d31f0334f4561240b04459; >= e7850f4d844e0acfac7e570af611d89deade3146, < 90f601b497d76f40fa66795c3ecf625b6aced9fd; 467a50d5db7deaf656e18a1f633be9ecd94b393a; 4a8b4124ea4156ca52918b66c750a69c6d932aa5; 3fe116e33a855bbfdd32dc207e9be2a41e3ed3a6; c0e0ab60d0b15469e69db93215dad009999f5a5b; 5ab9464a2a3c538eedbb438f1802f2fd98d0953f; d28492be82e19fc69cc69975fc2052b37ef0c821; >= 4.9.262, < 4.10; >= 4.14.226, < 4.15; >= 4.19.181, < 4.20; >= 5.4.106, < 5.5; >= 5.10.24, < 5.11; >= 5.11.7, < 5.12
LinuxLinux5.12

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2025-68239?
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.
How severe is CVE-2025-68239?
Severity scoring for CVE-2025-68239 is pending analysis. The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2025-68239?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST