SUSE-SU-2026:2334-1
Vulnerability from csaf_suse - Published: 2026-06-10 08:42 - Updated: 2026-06-10 08:42Summary
Security update for libyang
Severity
Important
Notes
Title of the patch: Security update for libyang
Description of the patch: This update for libyang fixes the following issues
- CVE-2026-41401: use-after-free in `lyd_parser_set_data_flags` when processing crafted YANG XML documents with specific
metadata attributes (bsc#1266316).
- CVE-2026-44673: integer overflow in `lyb_read_string()` of `src/parser_lyb.c` leads to heap buffer overflow when
parsing a maliciously crafted LYB binary blob (bsc#1265330).
Patchnames: SUSE-2026-2334,SUSE-SLE-SERVER-12-SP5-LTSS-2026-2334,SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2334
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
8.1 (High)
Affected products
Recommended
5 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libyang2-2.1.148-8.8.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
8.6 (High)
Affected products
Recommended
5 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libyang2-2.1.148-8.8.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
References
12 references
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{
"category": "general",
"text": "libyang before 5.2.6 contains a heap use-after-free write vulnerability in lyd_parser_set_data_flags that incorrectly updates metadata list pointers when freeing non-head default metadata entries. Attackers can trigger this vulnerability by submitting crafted YANG XML documents with specific metadata attributes to applications parsing untrusted XML data, causing process crashes or potential code execution.",
"title": "CVE description"
}
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{
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"details": "important"
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},
{
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"text": "https://www.suse.com/security/cve/CVE-2026-44673"
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"notes": [
{
"category": "general",
"text": "libyang is a YANG data modeling language library. Prior to SO 5.2.15, lyb_read_string() in src/parser_lyb.c contains an integer overflow that results in a heap buffer overflow when parsing a maliciously crafted LYB binary blob. An attacker who can supply LYB data to any libyang consumer (NETCONF server, sysrepo, etc.) can trigger a crash or potential heap corruption. This vulnerability is fixed in SO 5.2.15.",
"title": "CVE description"
}
],
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{
"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 12 SP5-LTSS:libyang2-2.1.148-8.8.1.aarch64",
"SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.ppc64le",
"SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.s390x",
"SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.x86_64",
"SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libyang2-2.1.148-8.8.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 8.6,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
},
"products": [
"SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.aarch64",
"SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.ppc64le",
"SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.s390x",
"SUSE Linux Enterprise Server 12 SP5-LTSS:libyang2-2.1.148-8.8.1.x86_64",
"SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libyang2-2.1.148-8.8.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-06-10T08:42:41Z",
"details": "important"
}
],
"title": "CVE-2026-44673"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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