CVE-2022-49838

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49838
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49838.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49838
Related
Published
2025-05-01T15:16:07Z
Modified
2025-05-02T14:48:29.406882Z
Summary
[none]
Details

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

sctp: clear out_curr if all frag chunks of current msg are pruned

A crash was reported by Zhen Chen:

listdel corruption, ffffa035ddf01c18->next is NULL WARNING: CPU: 1 PID: 250682 at lib/listdebug.c:49 listdelentryvalid+0x59/0xe0 RIP: 0010:listdelentryvalid+0x59/0xe0 Call Trace: sctpscheddequeuecommon+0x17/0x70 [sctp] sctpschedfcfsdequeue+0x37/0x50 [sctp] sctpoutqflushdata+0x85/0x360 [sctp] sctpoutquncork+0x77/0xa0 [sctp] sctpcmdinterpreter.constprop.0+0x164/0x1450 [sctp] sctpsideeffects+0x37/0xe0 [sctp] sctpdosm+0xd0/0x230 [sctp] sctpprimitiveSEND+0x2f/0x40 [sctp] sctpsendmsgtoasoc+0x3fa/0x5c0 [sctp] sctpsendmsg+0x3d5/0x440 [sctp] socksendmsg+0x5b/0x70

and in sctpschedfcfsdequeue() it dequeued a chunk from stream outcurr outq while this outq was empty.

Normally stream->outcurr must be set to NULL once all frag chunks of current msg are dequeued, as we can see in sctpscheddequeuedone(). However, in sctpprsctppruneunsent() as it is not a proper dequeue, sctpscheddequeuedone() is not called to do this.

This patch is to fix it by simply setting outcurr to NULL when the last frag chunk of current msg is dequeued from outcurr stream in sctpprsctpprune_unsent().

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
5.10.158-1

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
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2

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
6.0.10-1

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
6.0.10-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}