CVE-2021-38166: Integer Overflow
First published: Sat Aug 07 2021(Updated: )
In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without the CAP_SYS_ADMIN capability.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=5.13.8 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Debian Debian Linux | =11.0 | |
| debian/linux | 5.10.223-1 6.1.106-3 6.1.99-1 6.10.9-1 |
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Reference Links
- https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GUVLBJKZMWA3E3YXSH4SZ7BOYGJP4GXP/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UL6CH5M5PRLMA3KPBX4LPUO6Z73GRISO/
- https://lore.kernel.org/bpf/20210806150419.109658-1-th.yasumatsu@gmail.com/
- https://security.netapp.com/advisory/ntap-20210909-0001/
- https://www.debian.org/security/2021/dsa-4978
- https://launchpad.net/bugs/cve/CVE-2021-38166
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUVLBJKZMWA3E3YXSH4SZ7BOYGJP4GXP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UL6CH5M5PRLMA3KPBX4LPUO6Z73GRISO/
- https://lore.kernel.org/bpf/20210806150419.109658-1-th.yasumatsu%40gmail.com/
- https://security-tracker.debian.org/tracker/CVE-2021-38166
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38166
- https://nvd.nist.gov/vuln/detail/CVE-2021-38166
- https://ubuntu.com/security/CVE-2021-38166
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