CVE-2021-47383: tty: Fix out-of-bound vmalloc access in imageblit
First published: Tue May 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: tty: Fix out-of-bound vmalloc access in imageblit The Linux kernel CVE team has assigned <a href="https://access.redhat.com/security/cve/CVE-2021-47383">CVE-2021-47383</a> to this issue. Upstream advisory: <a href="https://lore.kernel.org/linux-cve-announce/2024052144-CVE-2021-47383-a8f4@gregkh/T">https://lore.kernel.org/linux-cve-announce/2024052144-CVE-2021-47383-a8f4@gregkh/T</a>
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.4.286 | 4.4.286 |
| redhat/kernel | <4.9.285 | 4.9.285 |
| redhat/kernel | <4.14.249 | 4.14.249 |
| redhat/kernel | <4.19.209 | 4.19.209 |
| redhat/kernel | <5.4.151 | 5.4.151 |
| redhat/kernel | <5.10.71 | 5.10.71 |
| redhat/kernel | <5.14.10 | 5.14.10 |
| 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/067c694d06040db6f0c65281bb358452ca6d85b9
- https://git.kernel.org/stable/c/3b0c406124719b625b1aba431659f5cdc24a982c
- https://git.kernel.org/stable/c/699d926585daa6ec44be556cdc1ab89e5d54557b
- https://git.kernel.org/stable/c/70aed03b1d5a5df974f456cdc8eedb213c94bb8b
- https://git.kernel.org/stable/c/7e71fcedfda6f7de18f850a6b36e78d78b04476f
- https://git.kernel.org/stable/c/883f7897a25e3ce14a7f274ca4c73f49ac84002a
- https://git.kernel.org/stable/c/8a6a240f52e14356386030d8958ae8b1761d2325
- https://git.kernel.org/stable/c/d570c48dd37dbe8fc6875d4461d01a9554ae2560
- https://access.redhat.com/security/cve/CVE-2021-47383
- https://lore.kernel.org/linux-cve-announce/2024052144-CVE-2021-47383-a8f4@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:5365
- https://access.redhat.com/errata/RHSA-2024:5364
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://access.redhat.com/errata/RHSA-2024:8617
- https://bugzilla.redhat.com/show_bug.cgi?id=2282357
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-47383?
CVE-2021-47383 has been classified as a medium severity vulnerability due to its potential for out-of-bound memory access.
How do I fix CVE-2021-47383?
To mitigate CVE-2021-47383, update your Linux kernel to a version that is patched, such as 4.4.286, 4.9.285, 4.14.249, 4.19.209, 5.4.151, 5.10.71, 5.14.10, or 5.15.
What systems are affected by CVE-2021-47383?
CVE-2021-47383 affects specific versions of the Linux kernel as well as IBM Security Verify Governance and its related products up to version ISVG 10.0.2.
What type of vulnerability is CVE-2021-47383?
CVE-2021-47383 is an out-of-bounds memory access vulnerability found in the Linux kernel's tty subsystem.
Can CVE-2021-47383 lead to remote exploitation?
There is a potential risk that CVE-2021-47383 could be leveraged for remote exploitation depending on the context of use and existing security measures.
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