CVE-2023-53373: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: seqiv - Handle EBUSY correctly As it is seqiv only handles the special return value of EINPROGERSS, which means that in all other cases it will free data related to the request. However, as the caller of seqiv may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.25 — 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 — 5.15.99
linux	linux_kernel	5.16 — 6.1.16
linux	linux_kernel	6.2 — 6.2.3

References

Advisories & Patches

https://git.kernel.org/stable/c/1effbddaff60eeef8017c6dea1ee0ed970164d14 https://git.kernel.org/stable/c/32e62025e5e52fbe4812ef044759de7010b15dbc https://git.kernel.org/stable/c/36ec108b7bd7e280edb22de028467bd09d644620 https://git.kernel.org/stable/c/4d497e8b200a175094e0ac252ed878add39b8771 https://git.kernel.org/stable/c/63551e4b7cbcd9914258827699eb2cb6ed6e4a16 https://git.kernel.org/stable/c/9477db935eb690f697d9bcc4f608927841bc8b36 https://git.kernel.org/stable/c/ae849d2f48019ff9c104e32bf588ccbfb200e971 https://git.kernel.org/stable/c/cc4d0d4251748a8a68026938f4055d2ac47c5719

Frequently Asked Questions

What is CVE-2023-53373? +

In the Linux kernel, the following vulnerability has been resolved: crypto: seqiv - Handle EBUSY correctly As it is seqiv only handles the special return value of EINPROGERSS, which means that in all other cases it will free data related to the request. However, as the caller of seqiv may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53373? +

CVE-2023-53373 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-53373? +

CVE-2023-53373 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-2023-53373? +

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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