CVE-2024-27023: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: md: Fix missing release of 'active_io' for flush submit_flushes atomic_set(&mddev->flush_pending, 1); rdev_for_each_rcu(rdev, mddev) atomic_inc(&mddev->flush_pending); bi->bi_end_io = md_end_flush submit_bio(bi); /* flush io is done first */ md_end_flush if (atomic_dec_and_test(&mddev->flush_pending)) percpu_ref_put(&mddev->active_io) -> active_io is not released if (atomic_dec_and_test(&mddev->flush_pending)) -> missing release of active_io For consequence, mddev_suspend() will wait for 'active_io' to be zero forever. Fix this problem by releasing 'active_io' in submit_flushes() if 'flush_pending' is decreased to zero.

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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

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.1.75 — 6.1.80
linux	linux_kernel	6.6.14 — 6.6.19
linux	linux_kernel	6.7.2 — 6.7.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/02dad157ba11064d073f5499dc33552b227d5d3a https://git.kernel.org/stable/c/11f81438927f84edfaaeb5d5f10856c3a1c1fc82 https://git.kernel.org/stable/c/6b2ff10390b19a2364af622b6666b690443f9f3f https://git.kernel.org/stable/c/855678ed8534518e2b428bcbcec695de9ba248e8 https://git.kernel.org/stable/c/02dad157ba11064d073f5499dc33552b227d5d3a https://git.kernel.org/stable/c/11f81438927f84edfaaeb5d5f10856c3a1c1fc82 https://git.kernel.org/stable/c/6b2ff10390b19a2364af622b6666b690443f9f3f https://git.kernel.org/stable/c/855678ed8534518e2b428bcbcec695de9ba248e8

Frequently Asked Questions

What is CVE-2024-27023? +

In the Linux kernel, the following vulnerability has been resolved: md: Fix missing release of 'active_io' for flush submit_flushes atomic_set(&mddev->flush_pending, 1); rdev_for_each_rcu(rdev, mddev) atomic_inc(&mddev->flush_pending); bi->bi_end_io = md_end_flush submit_bio(bi); /* flush io is done first */ md_end_flush if (atomic_dec_and_test(&mddev->flush_pending)) percpu_ref_put(&mddev->active_io) -> active_io is not released if (atomic_dec_and_test(&mddev->flush_pending)) -> missing release of active_io For consequence, mddev_suspend() will wait for 'active_io' to be zero forever. Fix this problem by releasing 'active_io' in submit_flushes() if 'flush_pending' is decreased to zero. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-27023? +

CVE-2024-27023 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-2024-27023? +

CVE-2024-27023 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-2024-27023? +

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-2024-27023