CVE-2021-47320: nfs: fix acl memory leak of posix_acl_create()
First published: Tue May 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: nfs: fix acl memory leak of posix_acl_create() When looking into another nfs xfstests report, I found acl and default_acl in nfs3_proc_create() and nfs3_proc_mknod() error paths are possibly leaked. Fix them in advance.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.14<4.4.276 | |
| Linux Kernel | >=4.5<4.9.276 | |
| Linux Kernel | >=4.10<4.14.240 | |
| Linux Kernel | >=4.15<4.19.198 | |
| Linux Kernel | >=4.20<5.4.134 | |
| Linux Kernel | >=5.5<5.10.52 | |
| Linux Kernel | >=5.11<5.12.19 | |
| Linux Kernel | >=5.13<5.13.4 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.22-1 |
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Reference Links
- https://git.kernel.org/stable/c/2e3960f276b4574a9bb0dfa31a7497302f6363b2
- https://git.kernel.org/stable/c/cef9d9acb7c80ed6bace894b6334557fd493863b
- https://git.kernel.org/stable/c/8a2b308a54c5ec224fedc753617f99b29ffcd883
- https://git.kernel.org/stable/c/0704f617040c397ae73c1f88f3956787ec5d6529
- https://git.kernel.org/stable/c/d0b32dc1409f7e65e4fcc34e236462268e69a357
- https://git.kernel.org/stable/c/4b515308ab875c7e8ada8e606fe0c64762da5ed4
- https://git.kernel.org/stable/c/c8fc86e9df6a6a03f5a8e15a3b7a5c75fd05aa38
- https://git.kernel.org/stable/c/687cf32865b2d6960214bce523f2afac58dd3cd2
- https://git.kernel.org/stable/c/1fcb6fcd74a222d9ead54d405842fc763bb86262
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47320
- https://nvd.nist.gov/vuln/detail/CVE-2021-47320
- https://launchpad.net/bugs/cve/CVE-2021-47320
- https://security-tracker.debian.org/tracker/CVE-2021-47320
- https://ubuntu.com/security/CVE-2021-47320
- https://git.kernel.org/linus/1fcb6fcd74a222d9ead54d405842fc763bb86262
Frequently Asked Questions
What is the severity of CVE-2021-47320?
CVE-2021-47320 has a severity rating of medium, as it involves a memory leak in the Linux kernel.
How do I fix CVE-2021-47320?
To fix CVE-2021-47320, update your Linux kernel to a version that includes the patch addressing this vulnerability.
Which Linux kernel versions are affected by CVE-2021-47320?
CVE-2021-47320 affects multiple Linux kernel versions ranging from 3.14 to 5.13.4.
What is the impact of CVE-2021-47320?
The impact of CVE-2021-47320 is primarily a memory leak, which could potentially lead to increased memory usage over time.
Is CVE-2021-47320 related to NFS?
Yes, CVE-2021-47320 is related to the NFS subsystem in the Linux kernel, specifically affecting the handling of access control lists.
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