CVE-2021-47356: mISDN: fix possible use-after-free in HFC_cleanup()
First published: Tue May 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() The Linux kernel CVE team has assigned <a href="https://access.redhat.com/security/cve/CVE-2021-47356">CVE-2021-47356</a> to this issue. Upstream advisory: <a href="https://lore.kernel.org/linux-cve-announce/2024052142-CVE-2021-47356-a3d4@gregkh/T">https://lore.kernel.org/linux-cve-announce/2024052142-CVE-2021-47356-a3d4@gregkh/T</a>
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.4.276 | 4.4.276 |
| redhat/kernel | <4.9.276 | 4.9.276 |
| redhat/kernel | <4.14.240 | 4.14.240 |
| redhat/kernel | <4.19.198 | 4.19.198 |
| redhat/kernel | <5.4.133 | 5.4.133 |
| redhat/kernel | <5.10.51 | 5.10.51 |
| redhat/kernel | <5.12.18 | 5.12.18 |
| redhat/kernel | <5.13.3 | 5.13.3 |
| redhat/kernel | <5.14 | 5.14 |
| Linux Kernel | <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<5.4.133 | |
| Linux Kernel | >=5.5<5.10.51 | |
| Linux Kernel | >=5.11<5.12.18 | |
| Linux Kernel | >=5.13<5.13.3 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2021-47356
- https://lore.kernel.org/linux-cve-announce/2024052142-CVE-2021-47356-a3d4@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:4211
- https://access.redhat.com/errata/RHSA-2024:4352
- https://access.redhat.com/errata/RHSA-2024:5692
- https://access.redhat.com/errata/RHSA-2024:6993
- https://bugzilla.redhat.com/show_bug.cgi?id=2282394
- https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe
- https://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7
- https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5
- https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124
- https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0
- https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d
- https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020
- https://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda
- https://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-47356?
CVE-2021-47356 is rated as a medium severity vulnerability due to its potential to cause use-after-free issues.
How do I fix CVE-2021-47356?
To fix CVE-2021-47356, ensure that your Linux kernel version is updated to a patched version that is higher than 4.4.276, 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3, or 5.14.
Which Linux kernel versions are affected by CVE-2021-47356?
CVE-2021-47356 affects Linux kernel versions older than or equal to 4.4.276, 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3, and 5.14.
What is the potential impact of CVE-2021-47356?
The potential impact of CVE-2021-47356 includes exploitation that may lead to a denial of service or arbitrary code execution.
How can I determine if my system is vulnerable to CVE-2021-47356?
You can determine if your system is vulnerable to CVE-2021-47356 by checking your current Linux kernel version against the affected versions listed in the vulnerability details.
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