CVE-2022-2526
Published: 24 August 2022
A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
systemd Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(249.11-0ubuntu3.4)
|
| xenial |
Not vulnerable
(code not present)
|
|
| focal |
Not vulnerable
(245.4-4ubuntu3.17)
|
|
| upstream |
Released
(240-1)
|
|
| bionic |
Released
(237-3ubuntu10.56)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
|
Patches: upstream: https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c (v240) |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |