CVE-2024-39494: ima: Fix use-after-free on a dentry's dname.name
First published: Fri Jul 12 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ima: Fix use-after-free on a dentry's dname.name ->d_name.name can change on rename and the earlier value can be freed; there are conditions sufficient to stabilize it (->d_lock on dentry, ->d_lock on its parent, ->i_rwsem exclusive on the parent's inode, rename_lock), but none of those are met at any of the sites. Take a stable snapshot of the name instead.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.1.97 | |
| Linux Linux kernel | >=6.2<6.6.35 | |
| Linux Linux kernel | >=6.7<6.9.6 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- https://git.kernel.org/stable/c/7fb374981e31c193b1152ed8d3b0a95b671330d4
- https://git.kernel.org/stable/c/a78a6f0da57d058e2009e9958fdcef66f165208c
- https://git.kernel.org/stable/c/be84f32bb2c981ca670922e047cdde1488b233de
- https://git.kernel.org/stable/c/dd431c3ac1fc34a9268580dd59ad3e3c76b32a8c
- https://launchpad.net/bugs/cve/CVE-2024-39494
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39494
- https://nvd.nist.gov/vuln/detail/CVE-2024-39494
- https://security-tracker.debian.org/tracker/CVE-2024-39494
- https://ubuntu.com/security/CVE-2024-39494
- https://git.kernel.org/linus/be84f32bb2c981ca670922e047cdde1488b233de
- https://git.kernel.org/stable/c/0b31e28fbd773aefb6164687e0767319b8199829
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