Bug 2567239

Summary:	CVE-2026-121943 sngrep: sngrep: Denial of Service via crafted SIP packet [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Samuele Negrini <snegrini>
Component:	sngrep	Assignee:	Peter Lemenkov <lemenkov>
Status:	ON_QA ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	lemenkov
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["55f88801-03d4-4cc8-9a73-913eeddff1cd"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2566875

Description Samuele Negrini 2026-11-05 11:23:54 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Irontec sngrep through 1.9.0 contains an out-of-bounds stack read vulnerability in sip_check_packet and sip_validate_packet caused by an off-by-one length check on 10240-byte SIP payloads. Remote attackers can send a crafted UDP or TCP SIP packet or supply a pcap file to crash sngrep or leak adjacent stack bytes into displayed SIP fields.

Comment 1 Fedora Update System 2026-11-05 16:20:47 UTC

FEDORA-2026-39f14c4384 (sngrep-1.9.0-4.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-39f14c4384

Comment 2 Fedora Update System 2026-11-05 16:20:50 UTC

FEDORA-2026-1e72c25706 (sngrep-1.9.0-4.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-1e72c25706

Comment 3 Fedora Update System 2026-11-05 16:20:53 UTC

FEDORA-2026-f194aee07b (sngrep-1.9.0-4.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f194aee07b

Comment 4 Fedora Update System 2026-11-06 03:13:05 UTC

FEDORA-2026-1e72c25706 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-1e72c25706`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-1e72c25706

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-11-06 03:33:30 UTC

FEDORA-2026-f194aee07b has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-f194aee07b`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f194aee07b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-11-06 18:17:43 UTC

FEDORA-2026-39f14c4384 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-39f14c4384`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-39f14c4384

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.