UBUNTU-CVE-2024-40938
In the Linux kernel, the following vulnerability has been resolved: landlock: Fix d_parent walk The WARN_ON_ONCE() in collect_domain_accesses() can be triggered when trying to link a root mount point. This cannot work in practice because this directory is mounted, but the VFS check is done after the call to security_path_link(). Do not use source directory's d_parent when the source directory is the mount point. [mic: Fix commit message]
02 / AFFECTED SOFTWARE
Affected packages
4 explicit affected versions
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35 explicit affected versions
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: landlock: Fix d_parent walk The WARN_ON_ONCE() in collect_domain_accesses() can be triggered when trying to link a root mount point. This cannot work in practice because this directory is mounted, but the VFS check is done after the call to security_path_link(). Do not use source directory's d_parent when the source directory is the mount point. [mic: Fix commit message]
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc
- https://git.kernel.org/stable/c/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc
- https://git.kernel.org/stable/c/b6e5e696435832b33e40775f060ef5c95f4fda1f
- https://git.kernel.org/stable/c/c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6
- https://git.kernel.org/stable/c/cc30d05b34f9a087a6928d09b131f7b491e9ab11
- https://ubuntu.com/security/CVE-2024-40938
- https://ubuntu.com/security/notices/USN-6999-1
- https://ubuntu.com/security/notices/USN-6999-2
- https://ubuntu.com/security/notices/USN-7004-1
- https://ubuntu.com/security/notices/USN-7005-1
- https://ubuntu.com/security/notices/USN-7005-2
- https://ubuntu.com/security/notices/USN-7008-1
- https://ubuntu.com/security/notices/USN-7029-1
- https://www.cve.org/CVERecord?id=CVE-2024-40938