CVE-2024-35869: smb: client: guarantee refcounted children from parent session
First published: Sun May 19 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.6.29 | 6.6.29 |
| redhat/kernel | <6.8.5 | 6.8.5 |
| redhat/kernel | <6.9 | 6.9 |
| Linux Kernel | <6.6.29 | |
| Linux Kernel | >=6.7<6.8.5 | |
| Linux Kernel | =6.9-rc1 | |
| Linux Kernel | =6.9-rc2 | |
| debian/linux | <=5.10.223-1<=5.10.234-1<=6.1.129-1<=6.1.135-1 | 6.12.22-1 6.12.25-1 |
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Reference Links
- https://git.kernel.org/stable/c/062a7f0ff46eb57aff526897bd2bebfdb1d3046a
- https://git.kernel.org/stable/c/645f332c6b63499cc76197f9b6bffcc659ba64cc
- https://git.kernel.org/stable/c/e1db9ae87b7148c021daee1fcc4bc71b2ac58a79
- https://launchpad.net/bugs/cve/CVE-2024-35869
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35869
- https://nvd.nist.gov/vuln/detail/CVE-2024-35869
- https://security-tracker.debian.org/tracker/CVE-2024-35869
- https://ubuntu.com/security/CVE-2024-35869
- https://git.kernel.org/linus/062a7f0ff46eb57aff526897bd2bebfdb1d3046a
- https://access.redhat.com/security/cve/CVE-2024-35869
- https://lore.kernel.org/linux-cve-announce/2024051940-CVE-2024-35869-73f8@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2281744
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2281742
Frequently Asked Questions
What is the severity of CVE-2024-35869?
CVE-2024-35869 has been classified as a moderate severity vulnerability affecting the Linux kernel.
How do I fix CVE-2024-35869?
To fix CVE-2024-35869, update the kernel to the appropriate versions such as 6.6.29 for Red Hat or 6.12.11-1 for Debian.
Which Linux distributions are affected by CVE-2024-35869?
CVE-2024-35869 affects various Linux distributions including certain versions of Red Hat and Debian kernels.
What impact does CVE-2024-35869 have on Linux systems?
CVE-2024-35869 may lead to potential use-after-free bugs when walking DFS referrals or during failover operations.
Is there a workaround for CVE-2024-35869?
Currently, the recommended preventive measure for CVE-2024-35869 is to ensure your Linux kernel is updated to the patched versions.
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