CVE-2021-47086: phonet/pep: refuse to enable an unbound pipe
First published: Mon Mar 04 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: phonet/pep: refuse to enable an unbound pipe This ioctl() implicitly assumed that the socket was already bound to a valid local socket name, i.e. Phonet object. If the socket was not bound, two separate problems would occur: 1) We'd send an pipe enablement request with an invalid source object. 2) Later socket calls could BUG on the socket unexpectedly being connected yet not bound to a valid object.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <4.4.297 | |
| Linux Kernel | >=4.5<4.9.295 | |
| Linux Kernel | >=4.10<4.14.260 | |
| Linux Kernel | >=4.15<4.19.223 | |
| Linux Kernel | >=4.20<5.4.169 | |
| Linux Kernel | >=5.5<5.10.89 | |
| Linux Kernel | >=5.11<5.15.12 | |
| Linux Kernel | =5.16-rc1 | |
| Linux Kernel | =5.16-rc2 | |
| Linux Kernel | =5.16-rc3 | |
| Linux Kernel | =5.16-rc4 | |
| Linux Kernel | =5.16-rc5 | |
| Linux Kernel | =5.16-rc6 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59
- https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161
- https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b
- https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52
- https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa
- https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068
- https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235
- https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47086
- https://nvd.nist.gov/vuln/detail/CVE-2021-47086
- https://launchpad.net/bugs/cve/CVE-2021-47086
- https://security-tracker.debian.org/tracker/CVE-2021-47086
- https://ubuntu.com/security/CVE-2021-47086
- https://git.kernel.org/linus/75a2f31520095600f650597c0ac41f48b5ba0068
Frequently Asked Questions
What is the severity of CVE-2021-47086?
CVE-2021-47086 is considered a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2021-47086?
To fix CVE-2021-47086, update your Linux kernel to versions 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.10-1, or 6.12.11-1.
Which versions of the Linux kernel are affected by CVE-2021-47086?
CVE-2021-47086 affects several versions of the Linux kernel, specifically versions prior to 4.4.297 and between 4.5 and 5.15.12.
What components are involved in CVE-2021-47086?
CVE-2021-47086 involves the phonet/pep component of the Linux kernel.
Is CVE-2021-47086 a remote code execution vulnerability?
No, CVE-2021-47086 does not directly lead to remote code execution; it primarily concerns socket binding issues.
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