CVE-2023-1838: Use After Free
First published: Wed May 18 2022(Updated: )
A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network subcomponent in the Linux kernel due to a double fget. This flaw could allow a local attacker to crash the system, and could even lead to a kernel information leak problem.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel 5.18 | <25 | 25 |
| Linux Kernel | <5.18_25 | |
| Linux Kernel | >=4.13<4.14.317 | |
| Linux Kernel | >=4.15<4.19.245 | |
| Linux Kernel | >=4.20<5.4.196 | |
| Linux Kernel | >=5.5<5.10.118 | |
| Linux Kernel | >=5.11<5.15.42 | |
| Linux Kernel | >=5.16<5.17.10 | |
| NetApp H300S Firmware | ||
| NetApp H410C Firmware | ||
| NetApp H410S Firmware | ||
| NetApp H500e Firmware | ||
| NetApp H700S | ||
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.21-1 6.12.22-1 |
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Reference Links
- https://lore.kernel.org/netdev/20220516084213.26854-1-jasowang@redhat.com/T/
- https://security.netapp.com/advisory/ntap-20230517-0003/
- https://access.redhat.com/errata/RHSA-2024:0412
- https://access.redhat.com/errata/RHSA-2024:0575
- https://access.redhat.com/errata/RHSA-2024:0881
- https://access.redhat.com/errata/RHSA-2024:0897
- https://bugzilla.redhat.com/show_bug.cgi?id=2087568
- https://launchpad.net/bugs/cve/CVE-2023-1838
- https://lore.kernel.org/netdev/20220516084213.26854-1-jasowang%40redhat.com/T/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1838
- https://nvd.nist.gov/vuln/detail/CVE-2023-1838
- https://security-tracker.debian.org/tracker/CVE-2023-1838
- https://ubuntu.com/security/CVE-2023-1838
- https://git.kernel.org/linus/fb4554c2232e44d595920f4d5c66cf8f7d13f9bc
- https://www.ibm.com/support/pages/node/7172423 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-1838?
CVE-2023-1838 has a high severity due to the potential for local attackers to crash systems or exploit kernel information leaks.
How do I fix CVE-2023-1838?
To fix CVE-2023-1838, update your Linux kernel to versions that are patched, such as those above 5.18 and specified remedied versions from Debian and IBM.
What are the affected systems for CVE-2023-1838?
CVE-2023-1838 affects various versions of the Linux kernel, IBM Security Verify Governance, and specific NetApp models.
What type of vulnerability is CVE-2023-1838?
CVE-2023-1838 is a use-after-free vulnerability in the Linux kernel, specifically in the vhost_net_set_backend function.
Can CVE-2023-1838 lead to remote code execution?
While CVE-2023-1838 primarily allows for system crashes and information leaks, it does not directly lead to remote code execution.
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