CVE-2023-53298
nfc: fix memory leak of se_io context in nfc_genl_se_io
Description
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.
INFO
Published Date :
Sept. 16, 2025, 8:15 a.m.
Last Modified :
Sept. 16, 2025, 12:49 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the patch to fix the memory leak.
- Ensure context is freed on error paths.
- Free cb_context explicitly on error paths.
References to Advisories, Solutions, and Tools
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CVE-2023-53298.
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specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-53298 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
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stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-53298
weaknesses.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 16, 2025
Action Type Old Value New Value Added Description 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. Added Reference https://git.kernel.org/stable/c/25ff6f8a5a3b8dc48e8abda6f013e8cc4b14ffea Added Reference https://git.kernel.org/stable/c/271eed1736426103335c5aac50f15b0f4d236bc0 Added Reference https://git.kernel.org/stable/c/5321da6d84b87a34eea441677d649c34bd854169 Added Reference https://git.kernel.org/stable/c/8978315cb4bf8878c9c8ec05dafd8f7ff539860d Added Reference https://git.kernel.org/stable/c/af452e35b9e6a87cd49e54a7a3d60d934b194651 Added Reference https://git.kernel.org/stable/c/b2036a252381949d3b743a3de069324ae3028a57 Added Reference https://git.kernel.org/stable/c/ba98db08895748c12e5ded52cd1598dce2c79e55 Added Reference https://git.kernel.org/stable/c/c494365432dcdc549986f4d9af9eb6190cbdb153