CVE-2021-47491: mm: khugepaged: skip huge page collapse for special files
First published: Wed May 22 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: mm: khugepaged: skip huge page collapse for special files The Linux kernel CVE team has assigned <a href="https://access.redhat.com/security/cve/CVE-2021-47491">CVE-2021-47491</a> to this issue. Upstream advisory: <a href="https://lore.kernel.org/linux-cve-announce/2024052241-CVE-2021-47491-437d@gregkh/T">https://lore.kernel.org/linux-cve-announce/2024052241-CVE-2021-47491-437d@gregkh/T</a>
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.10.78 | 5.10.78 |
| redhat/kernel | <5.14.16 | 5.14.16 |
| redhat/kernel | <5.15 | 5.15 |
| 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://git.kernel.org/stable/c/5fcb6fce74ffa614d964667110cf1a516c48c6d9
- https://git.kernel.org/stable/c/6d67b2a73b8e3a079c355bab3c1aef7d85a044b8
- https://git.kernel.org/stable/c/a4aeaa06d45e90f9b279f0b09de84bd00006e733
- https://access.redhat.com/security/cve/CVE-2021-47491
- https://lore.kernel.org/linux-cve-announce/2024052241-CVE-2021-47491-437d@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://bugzilla.redhat.com/show_bug.cgi?id=2282925
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-47491?
CVE-2021-47491 is considered a moderate severity vulnerability due to its potential impact on system stability and performance.
How do I fix CVE-2021-47491?
To address CVE-2021-47491, it is recommended to upgrade the Linux kernel to version 5.10.78, 5.14.16, or any version higher than 5.15.
What systems are affected by CVE-2021-47491?
CVE-2021-47491 affects specific Red Hat kernel versions and IBM Security Verify Governance versions up to ISVG 10.0.2.
What impact does CVE-2021-47491 have on users?
Users may experience performance degradation or system instability related to huge page management in the Linux kernel due to CVE-2021-47491.
Is there a workaround for CVE-2021-47491?
Currently, there are no official workarounds for CVE-2021-47491; upgrading the kernel is the recommended solution.
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