CVE-2023-53298: linux kernel — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
linux	linux_kernel	3.13 — 4.14.308
linux	linux_kernel	4.15 — 4.19.276
linux	linux_kernel	4.20 — 5.4.235
linux	linux_kernel	5.5 — 5.10.173
linux	linux_kernel	5.11 — 5.15.100
linux	linux_kernel	5.16 — 6.1.18
linux	linux_kernel	6.2 — 6.2.5

References

Advisories & Patches

https://git.kernel.org/stable/c/25ff6f8a5a3b8dc48e8abda6f013e8cc4b14ffea https://git.kernel.org/stable/c/271eed1736426103335c5aac50f15b0f4d236bc0 https://git.kernel.org/stable/c/5321da6d84b87a34eea441677d649c34bd854169 https://git.kernel.org/stable/c/8978315cb4bf8878c9c8ec05dafd8f7ff539860d https://git.kernel.org/stable/c/af452e35b9e6a87cd49e54a7a3d60d934b194651 https://git.kernel.org/stable/c/b2036a252381949d3b743a3de069324ae3028a57 https://git.kernel.org/stable/c/ba98db08895748c12e5ded52cd1598dce2c79e55 https://git.kernel.org/stable/c/c494365432dcdc549986f4d9af9eb6190cbdb153

Frequently Asked Questions

What is CVE-2023-53298? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53298? +

CVE-2023-53298 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-53298? +

CVE-2023-53298 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53298? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2023-53298