CVE-2023-53307: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: rbd: avoid use-after-free in do_rbd_add() when rbd_dev_create() fails If getting an ID or setting up a work queue in rbd_dev_create() fails, use-after-free on rbd_dev->rbd_client, rbd_dev->spec and rbd_dev->opts is triggered in do_rbd_add(). The root cause is that the ownership of these structures is transfered to rbd_dev prematurely and they all end up getting freed when rbd_dev_create() calls rbd_dev_free() prior to returning to do_rbd_add(). Found by Linux Verification Center (linuxtesting.org) with SVACE, an incomplete patch submitted by Natalia Petrova <[email protected]>.

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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	4.9 — 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/71da2a151ed1adb0aea4252b16d81b53012e7afd https://git.kernel.org/stable/c/9787b328c42c13c4f31e7d5042c4e877e9344068 https://git.kernel.org/stable/c/a73783e4e0c4d1507794da211eeca75498544dff https://git.kernel.org/stable/c/ae16346078b1189aee934afd872d9f3d0a682c33 https://git.kernel.org/stable/c/cc8c0dd2984503ed09efa37bcafcef3d3da104e8 https://git.kernel.org/stable/c/e3cbb4d60764295992c95344f2d779439e8b34ce https://git.kernel.org/stable/c/f7c4d9b133c7a04ca619355574e96b6abf209fba https://git.kernel.org/stable/c/faa7b683e436664fff5648426950718277831348

Frequently Asked Questions

What is CVE-2023-53307? +

In the Linux kernel, the following vulnerability has been resolved: rbd: avoid use-after-free in do_rbd_add() when rbd_dev_create() fails If getting an ID or setting up a work queue in rbd_dev_create() fails, use-after-free on rbd_dev->rbd_client, rbd_dev->spec and rbd_dev->opts is triggered in do_rbd_add(). The root cause is that the ownership of these structures is transfered to rbd_dev prematurely and they all end up getting freed when rbd_dev_create() calls rbd_dev_free() prior to returning to do_rbd_add(). Found by Linux Verification Center (linuxtesting.org) with SVACE, an incomplete patch submitted by Natalia Petrova <[email protected]>. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53307? +

CVE-2023-53307 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-2023-53307? +

CVE-2023-53307 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-2023-53307? +

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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