Bug 2395668 (CVE-2023-53298)

Summary: CVE-2023-53298 kernel: nfc: fix memory leak of se_io context in nfc_genl_se_io
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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OS: Linux   
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Description OSIDB Bzimport 2025-09-16 09:02:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nfc: fix memory leak of se_io context in nfc_genl_se_io

The callback context for sending/receiving APDUs to/from the selected
secure element is allocated inside nfc_genl_se_io and supposed to be
eventually freed in se_io_cb callback function. However, there are several
error paths where the bwi_timer is not charged to call se_io_cb later, and
the cb_context is leaked.

The patch proposes to free the cb_context explicitly on those error paths.

At the moment we can't simply check 'dev->ops->se_io()' return value as it
may be negative in both cases: when the timer was charged and was not.
Comment 1 Keith Grant 2025-09-16 13:49:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091627-CVE-2023-53298-2ca9@gregkh/T