RHSA-2026:21333
Vulnerability from csaf_redhat - Published: 2026-05-27 13:21 - Updated: 2026-06-28 09:38Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
libsolv:
* libsolv-0.7.38-2.hum1 (aarch64, x86_64)
* libsolv-demo-0.7.38-2.hum1 (aarch64, x86_64)
* libsolv-devel-0.7.38-2.hum1 (aarch64, x86_64)
* libsolv-tools-0.7.38-2.hum1 (aarch64, x86_64)
* libsolv-tools-base-0.7.38-2.hum1 (aarch64, x86_64)
* perl-solv-0.7.38-2.hum1 (aarch64, x86_64)
* python3-solv-0.7.38-2.hum1 (aarch64, x86_64)
* ruby-solv-0.7.38-2.hum1 (aarch64, x86_64)
* libsolv-0.7.38-2.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted `.solv` file containing negative size values in the `repo_add_solv` function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).
6.5 (Medium)
Affected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in libsolv. This stack-based buffer overflow vulnerability occurs in libsolv's Debian metadata parser when processing specially crafted Debian repository metadata. An attacker could exploit this by providing malicious SHA384 or SHA512 checksum tags, leading to memory corruption and a denial of service (DoS) in the affected system.
6.5 (Medium)
Affected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in libsolv. This heap buffer overflow occurs during the decompression of attacker-controlled compressed data within `.solv` files due to insufficient input validation. An attacker can provide a specially crafted `.solv` file, which, when processed by a vulnerable application, can lead to out-of-bounds memory access. This could result in information disclosure, alteration of program execution, or a denial of service.
7.8 (High)
Affected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libsolv-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
References
21 references
Acknowledgments
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"notes": [
{
"category": "description",
"text": "A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted `.solv` file containing negative size values in the `repo_add_solv` function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).",
"title": "Vulnerability description"
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{
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"text": "libsolv: Heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Moderate impact heap buffer overflow in libsolv occurs when processing specially crafted `.solv` files with negative size values. Exploitation requires a victim to process attacker-controlled input, such as an untrusted `.solv` file, which can lead to a denial of service. The vulnerability is not easily exploitable without user interaction or specific application workflows that handle untrusted solvdb inputs.",
"title": "Statement"
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"product_ids": [
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"threats": [
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"details": "Moderate"
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"title": "libsolv: Heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file"
},
{
"acknowledgments": [
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}
],
"cve": "CVE-2026-9150",
"cwe": {
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"name": "Stack-based Buffer Overflow"
},
"discovery_date": "2026-04-21T21:15:41+00:00",
"ids": [
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"notes": [
{
"category": "description",
"text": "A flaw was found in libsolv. This stack-based buffer overflow vulnerability occurs in libsolv\u0027s Debian metadata parser when processing specially crafted Debian repository metadata. An attacker could exploit this by providing malicious SHA384 or SHA512 checksum tags, leading to memory corruption and a denial of service (DoS) in the affected system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libsolv: Stack-based buffer overflow in libsolv\u0027s Debian metadata parser when handling SHA384/SHA512 checksums",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Moderate impact flaw in libsolv\u0027s Debian metadata parser can lead to a denial of service due to a stack-based buffer overflow. Exploitation requires a victim to process specially crafted, untrusted Debian repository metadata containing malicious SHA384 or SHA512 checksums. While memory corruption occurs, reliable system compromise has not been demonstrated, and the vulnerability is not typically exposed in default Red Hat product configurations.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"Red Hat Hardened Images:libsolv-main@src",
"Red Hat Hardened Images:libsolv-main@x86_64"
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"restart_required": {
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"url": "https://access.redhat.com/errata/RHSA-2026:21333"
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"category": "workaround",
"details": "To mitigate this issue, ensure that libsolv only processes trusted and cryptographically signed Debian repository metadata. Avoid ingesting or processing `Packages` files from untrusted or unverified sources.",
"product_ids": [
"Red Hat Hardened Images:libsolv-main@aarch64",
"Red Hat Hardened Images:libsolv-main@src",
"Red Hat Hardened Images:libsolv-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:libsolv-main@aarch64",
"Red Hat Hardened Images:libsolv-main@src",
"Red Hat Hardened Images:libsolv-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "libsolv: Stack-based buffer overflow in libsolv\u0027s Debian metadata parser when handling SHA384/SHA512 checksums"
},
{
"acknowledgments": [
{
"summary": "This issue was discovered by Red Hat."
}
],
"cve": "CVE-2026-48864",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2026-04-21T23:19:41+00:00",
"ids": [
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"system_name": "Red Hat Bugzilla ID",
"text": "2460425"
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{
"category": "description",
"text": "A flaw was found in libsolv. This heap buffer overflow occurs during the decompression of attacker-controlled compressed data within `.solv` files due to insufficient input validation. An attacker can provide a specially crafted `.solv` file, which, when processed by a vulnerable application, can lead to out-of-bounds memory access. This could result in information disclosure, alteration of program execution, or a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libsolv: Heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This heap buffer overflow in libsolv\u0027s page decompression logic can lead to out-of-bounds reads and writes when processing specially crafted `.solv` files. Exploitation requires a victim application to ingest malicious repository metadata, limiting the attack vector to scenarios involving user interaction or untrusted content sources. Given the user interaction needed, Red Hat Product Security has rated this vulnerability as having a impact of Moderate.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"Red Hat Hardened Images:libsolv-main@src",
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"release_date": "2026-05-26T16:07:55.363000+00:00",
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"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:libsolv-main@aarch64",
"Red Hat Hardened Images:libsolv-main@src",
"Red Hat Hardened Images:libsolv-main@x86_64"
],
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},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"Red Hat Hardened Images:libsolv-main@aarch64",
"Red Hat Hardened Images:libsolv-main@src",
"Red Hat Hardened Images:libsolv-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:libsolv-main@aarch64",
"Red Hat Hardened Images:libsolv-main@src",
"Red Hat Hardened Images:libsolv-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "libsolv: Heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data"
}
]
}
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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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