CVE-2021-38208: Null Pointer Dereference
First published: Sun Aug 08 2021(Updated: )
A flaw in the Linux kernels NFC implementation allowed local unpriviledged users to cause a kernel panic to create a denial of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure of a bind call. Reference and upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4ac06a1e013cf5fdd963317ffd3b968560f33bba">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4ac06a1e013cf5fdd963317ffd3b968560f33bba</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.12.10 | |
| redhat/kernel | <5.13 | 5.13 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/08/17/1
- http://www.openwall.com/lists/oss-security/2021/08/17/2
- http://www.openwall.com/lists/oss-security/2021/08/24/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1992810
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- https://github.com/torvalds/linux/commit/4ac06a1e013cf5fdd963317ffd3b968560f33bba
- https://launchpad.net/bugs/cve/CVE-2021-38208
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4ac06a1e013cf5fdd963317ffd3b968560f33bba
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1992811
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1968057
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1992810#c7
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1992810#c9
- https://www.openwall.com/lists/oss-security/2021/08/24/2
- https://access.redhat.com/security/cve/cve-2021-38208
- https://git.kernel.org/linus/4ac06a1e013cf5fdd963317ffd3b968560f33bba
- https://security-tracker.debian.org/tracker/CVE-2021-38208
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38208
- https://nvd.nist.gov/vuln/detail/CVE-2021-38208
- https://ubuntu.com/security/CVE-2021-38208
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