CVE-2024-35869: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: guarantee refcounted children from parent session Avoid potential use-after-free bugs when walking DFS referrals, mounting and performing DFS failover by ensuring that all children from parent @tcon->ses are also refcounted. They're all needed across the entire DFS mount. Get rid of @tcon->dfs_ses_list while we're at it, too.

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CVSS v3.1 Score

8.4

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/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	6.2.8 — 6.3
linux	linux_kernel	6.4 — 6.6.29
linux	linux_kernel	6.7 — 6.8.5
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/062a7f0ff46eb57aff526897bd2bebfdb1d3046a https://git.kernel.org/stable/c/645f332c6b63499cc76197f9b6bffcc659ba64cc https://git.kernel.org/stable/c/e1db9ae87b7148c021daee1fcc4bc71b2ac58a79 https://git.kernel.org/stable/c/062a7f0ff46eb57aff526897bd2bebfdb1d3046a https://git.kernel.org/stable/c/645f332c6b63499cc76197f9b6bffcc659ba64cc https://git.kernel.org/stable/c/e1db9ae87b7148c021daee1fcc4bc71b2ac58a79

Frequently Asked Questions

What is CVE-2024-35869? +

In the Linux kernel, the following vulnerability has been resolved: smb: client: guarantee refcounted children from parent session Avoid potential use-after-free bugs when walking DFS referrals, mounting and performing DFS failover by ensuring that all children from parent @tcon->ses are also refcounted. They're all needed across the entire DFS mount. Get rid of @tcon->dfs_ses_list while we're at it, too. It has a CVSS v3.1 base score of 8.4 (HIGH).

How severe is CVE-2024-35869? +

CVE-2024-35869 has a CVSS v3.1 score of 8.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-35869? +

CVE-2024-35869 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-2024-35869? +

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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