SUSE-SU-2026:22836-1
Vulnerability from csaf_suse - Published: 2026-07-21 15:15 - Updated: 2026-09-16 20:06Summary
Security update for radvd
Severity
Important
Notes
Title of the patch: Security update for radvd
Description of the patch: This update for radvd fixes the following issue
- CVE-2026-48715: crafted ICMPv6 Router Advertisement can lead to a stack-based buffer overflow (bsc#1268641).
Changes for radvd:
- Update to version 2.21.
* feat: RFC8319 support: Increase max AdvDefaultLifetime and MaxRtrAdvInterval.
* feat: Add DHCPv6-PD preferred flag.
* fix: improve file checks for procfs knobs.
* feat: allow libc strlcpy.
* fix: make libcheck fatal if missing with --with-check.
* refactor: make drop_root_privileges reusable.
* fix: support incoming jumbo packets.
* Avoid libbsd header with libc strlcpy.
Patchnames: SUSE-SLES-16.0-1310
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.5 (High)
Affected products
Recommended
8 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
References
8 references
{
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"csaf_version": "2.0",
"distribution": {
"text": "Copyright 2024 SUSE LLC. All rights reserved.",
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"notes": [
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"category": "summary",
"text": "Security update for radvd",
"title": "Title of the patch"
},
{
"category": "description",
"text": "This update for radvd fixes the following issue\n\n - CVE-2026-48715: crafted ICMPv6 Router Advertisement can lead to a stack-based buffer overflow (bsc#1268641).\n\nChanges for radvd:\n\n- Update to version 2.21.\n * feat: RFC8319 support: Increase max AdvDefaultLifetime and MaxRtrAdvInterval.\n * feat: Add DHCPv6-PD preferred flag.\n * fix: improve file checks for procfs knobs.\n * feat: allow libc strlcpy.\n * fix: make libcheck fatal if missing with --with-check.\n * refactor: make drop_root_privileges reusable.\n * fix: support incoming jumbo packets.\n * Avoid libbsd header with libc strlcpy.\n",
"title": "Description of the patch"
},
{
"category": "details",
"text": "SUSE-SLES-16.0-1310",
"title": "Patchnames"
},
{
"category": "legal_disclaimer",
"text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
"title": "Terms of use"
}
],
"publisher": {
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"name": "SUSE Product Security Team",
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"url": "https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_22836-1.json"
},
{
"category": "self",
"summary": "URL for SUSE-SU-2026:22836-1",
"url": "https://www.suse.com/support/update/announcement/2026/suse-su-202622836-1/"
},
{
"category": "self",
"summary": "E-Mail link for SUSE-SU-2026:22836-1",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027912.html"
},
{
"category": "self",
"summary": "SUSE Bug 1268641",
"url": "https://bugzilla.suse.com/1268641"
},
{
"category": "self",
"summary": "SUSE CVE CVE-2026-48715 page",
"url": "https://www.suse.com/security/cve/CVE-2026-48715/"
}
],
"title": "Security update for radvd",
"tracking": {
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"generator": {
"date": "2026-07-21T15:15:00Z",
"engine": {
"name": "cve-database.git:bin/generate-csaf.pl",
"version": "1"
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"id": "SUSE-SU-2026:22836-1",
"initial_release_date": "2026-07-21T15:15:00Z",
"revision_history": [
{
"date": "2026-07-21T15:15:00Z",
"number": "1",
"summary": "Current version"
},
{
"date": "2026-09-16T19:18:16Z",
"number": "2",
"summary": "unknown changes"
},
{
"date": "2026-09-16T20:06:41Z",
"number": "3",
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}
],
"status": "final",
"version": "3"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "radvd-2.21-160000.1.1.aarch64",
"product": {
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"product_id": "radvd-2.21-160000.1.1.aarch64",
"product_identification_helper": {
"cpe": "cpe:2.3:a:litech:router_advertisement_daemon:2.21:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/radvd@2.21-160000.1.1?arch=aarch64\u0026upstream=radvd-2.21-160000.1.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "aarch64"
},
{
"branches": [
{
"category": "product_version",
"name": "radvd-2.21-160000.1.1.ppc64le",
"product": {
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"product_id": "radvd-2.21-160000.1.1.ppc64le",
"product_identification_helper": {
"cpe": "cpe:2.3:a:litech:router_advertisement_daemon:2.21:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/radvd@2.21-160000.1.1?arch=ppc64le\u0026upstream=radvd-2.21-160000.1.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "ppc64le"
},
{
"branches": [
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"category": "product_version",
"name": "radvd-2.21-160000.1.1.s390x",
"product": {
"name": "radvd-2.21-160000.1.1.s390x",
"product_id": "radvd-2.21-160000.1.1.s390x",
"product_identification_helper": {
"cpe": "cpe:2.3:a:litech:router_advertisement_daemon:2.21:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/radvd@2.21-160000.1.1?arch=s390x\u0026upstream=radvd-2.21-160000.1.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "s390x"
},
{
"branches": [
{
"category": "product_version",
"name": "radvd-2.21-160000.1.1.x86_64",
"product": {
"name": "radvd-2.21-160000.1.1.x86_64",
"product_id": "radvd-2.21-160000.1.1.x86_64",
"product_identification_helper": {
"cpe": "cpe:2.3:a:litech:router_advertisement_daemon:2.21:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/radvd@2.21-160000.1.1?arch=x86_64\u0026upstream=radvd-2.21-160000.1.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "x86_64"
},
{
"branches": [
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"name": "SUSE Linux Enterprise Server 16.0",
"product": {
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"product_id": "SUSE Linux Enterprise Server 16.0",
"product_identification_helper": {
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}
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},
{
"category": "product_name",
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"product": {
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}
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],
"category": "vendor",
"name": "SUSE"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "radvd-2.21-160000.1.1.aarch64 as component of SUSE Linux Enterprise Server 16.0",
"product_id": "SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.aarch64"
},
"product_reference": "radvd-2.21-160000.1.1.aarch64",
"relates_to_product_reference": "SUSE Linux Enterprise Server 16.0"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "radvd-2.21-160000.1.1.ppc64le as component of SUSE Linux Enterprise Server 16.0",
"product_id": "SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.ppc64le"
},
"product_reference": "radvd-2.21-160000.1.1.ppc64le",
"relates_to_product_reference": "SUSE Linux Enterprise Server 16.0"
},
{
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},
"product_reference": "radvd-2.21-160000.1.1.s390x",
"relates_to_product_reference": "SUSE Linux Enterprise Server 16.0"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "radvd-2.21-160000.1.1.x86_64 as component of SUSE Linux Enterprise Server 16.0",
"product_id": "SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.x86_64"
},
"product_reference": "radvd-2.21-160000.1.1.x86_64",
"relates_to_product_reference": "SUSE Linux Enterprise Server 16.0"
},
{
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"product_id": "SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.aarch64"
},
"product_reference": "radvd-2.21-160000.1.1.aarch64",
"relates_to_product_reference": "SUSE Linux Enterprise Server for SAP applications 16.0"
},
{
"category": "default_component_of",
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"product_id": "SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.ppc64le"
},
"product_reference": "radvd-2.21-160000.1.1.ppc64le",
"relates_to_product_reference": "SUSE Linux Enterprise Server for SAP applications 16.0"
},
{
"category": "default_component_of",
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},
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"relates_to_product_reference": "SUSE Linux Enterprise Server for SAP applications 16.0"
},
{
"category": "default_component_of",
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},
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]
},
"vulnerabilities": [
{
"cve": "CVE-2026-48715",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-48715"
}
],
"notes": [
{
"category": "general",
"text": "radvd is a router advertisement daemon for IPv6. Prior to version 2.21, the `radvdump` utility shipped with radvd contains a stack buffer overflow in the Route Information option parser. When processing a crafted ICMPv6 Router Advertisement, `print_ff()` copies up to 2032 bytes from attacker-controlled packet data into a 16-byte `struct in6_addr` on the stack, overflowing by up to 2016 bytes. Note that the main `radvd` daemon is not affected by the vulnerability. Version 2.21 patches the issue.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.aarch64",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.ppc64le",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.s390x",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.x86_64",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.aarch64",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.ppc64le",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.s390x",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-48715",
"url": "https://www.suse.com/security/cve/CVE-2026-48715"
},
{
"category": "external",
"summary": "SUSE Bug 1268641 for CVE-2026-48715",
"url": "https://bugzilla.suse.com/1268641"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.aarch64",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.ppc64le",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.s390x",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.x86_64",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.aarch64",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.ppc64le",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.s390x",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.aarch64",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.ppc64le",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.s390x",
"SUSE Linux Enterprise Server 16.0:radvd-2.21-160000.1.1.x86_64",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.aarch64",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.ppc64le",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.s390x",
"SUSE Linux Enterprise Server for SAP applications 16.0:radvd-2.21-160000.1.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-07-21T15:15:00Z",
"details": "important"
}
],
"title": "CVE-2026-48715"
}
]
}
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| Author | Source | Type | Date | Other |
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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