CVE-2022-48909

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48909
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48909.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48909
Related
Published
2024-08-22T02:15:05Z
Modified
2024-09-18T03:22:39.996905Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

net/smc: fix connection leak

There's a potential leak issue under following execution sequence :

smcrelease smcconnectwork if (sk->skstate == SMCINIT) sendclcconfirim tcpabort(); ... sk.skstate = SMCACTIVE smccloseactive switch(sk->skstate) { ... case SMCACTIVE: smcclosefinal() // then wait peer closed

Unfortunately, tcp_abort() may discard CLC CONFIRM messages that are still in the tcp send buffer, in which case our connection token cannot be delivered to the server side, which means that we cannot get a passive close message at all. Therefore, it is impossible for the to be disconnected at all.

This patch tries a very simple way to avoid this issue, once the state has changed to SMCACTIVE after tcpabort(), we can actively abort the smc connection, considering that the state is SMCINIT before tcpabort(), abandoning the complete disconnection process should not cause too much problem.

In fact, this problem may exist as long as the CLC CONFIRM message is not received by the server. Whether a timer should be added after smcclosefinal() needs to be discussed in the future. But even so, this patch provides a faster release for connection in above case, it should also be valuable.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.106-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.14-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.14-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}