CVE-2021-47086
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Record status
- Analyzed
Affected
- Linux Kernel < 4.4.297
- Linux Kernel < 4.9.295
- Linux Kernel < 4.14.260
- Linux Kernel < 4.19.223
- Linux Kernel < 5.4.169
- Linux Kernel < 5.10.89
- Linux Kernel < 5.15.12
- Linux Kernel 5.16
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-47086.md and follow it. Check whether this project is affected by CVE-2021-47086. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- 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://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59
- https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161
References
- 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://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