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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.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48863.json" } ], "title": "libsolv: Stack-based buffer overflow in libsolv EdDSA PGP signature verification allows denial of service", "tracking": { "current_release_date": "2026-07-16T01:05:50+00:00", "generator": { "date": "2026-07-16T01:05:50+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.3.6" } }, "id": "CVE-2026-48863", "initial_release_date": 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"relates_to_product_reference": "red_hat_update_infrastructure_4_for_cloud_providers" } ] }, "vulnerabilities": [ { "acknowledgments": [ { "names": [ "AISLE Research" ], "summary": "This issue was discovered by Red Hat." } ], "cve": "CVE-2026-48863", "cwe": { "id": "CWE-121", "name": "Stack-based Buffer Overflow" }, "discovery_date": "2026-04-23T00:57:48+00:00", "flags": [ { "label": "vulnerable_code_not_present", "product_ids": [ "red_hat_enterprise_linux_10:libsolv", "red_hat_enterprise_linux_10:libsolv-devel", "red_hat_enterprise_linux_10:libsolv-tools", "red_hat_enterprise_linux_10:libsolv-tools-base", "red_hat_enterprise_linux_10:libsolv.src", "red_hat_enterprise_linux_10:python3-solv", "red_hat_enterprise_linux_7:libsolv", "red_hat_enterprise_linux_7:libsolv-demo", "red_hat_enterprise_linux_7:libsolv-devel", "red_hat_enterprise_linux_7:libsolv-tools", "red_hat_enterprise_linux_7:libsolv.src", "red_hat_enterprise_linux_7:python2-solv", "red_hat_enterprise_linux_8:libsolv", "red_hat_enterprise_linux_8:libsolv-devel", "red_hat_enterprise_linux_8:libsolv-tools", "red_hat_enterprise_linux_8:libsolv.src", "red_hat_enterprise_linux_8:python3-solv", "red_hat_enterprise_linux_9:libsolv", "red_hat_enterprise_linux_9:libsolv-devel", "red_hat_enterprise_linux_9:libsolv-tools", "red_hat_enterprise_linux_9:libsolv.src", "red_hat_enterprise_linux_9:python3-solv", "red_hat_hardened_images:libsolv.src", "red_hat_openshift_container_platform_4:rhcos", "red_hat_satellite_6:libsolv.src::satellite-capsule:el8", "red_hat_satellite_6:libsolv::satellite-capsule:el8", "red_hat_satellite_6:python2-solv::satellite-capsule:el8", "red_hat_satellite_6:python3-solv::satellite-capsule:el8", "red_hat_update_infrastructure_4_for_cloud_providers:libsolv.src" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2460975" } ], "notes": [ { "category": "description", "text": "A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP verification component due to incorrect length handling when copying EdDSA 's' MPI into a stack buffer. A remote attacker could craft a malicious Ed25519 PGP signature with mismatched MPI lengths. Processing this crafted signature could lead to a denial of service in automated package or repository processing workflows.", "title": "Vulnerability description" }, { "category": "summary", "text": "libsolv: Stack-based buffer overflow in libsolv EdDSA PGP signature verification allows denial of service", "title": "Vulnerability summary" }, { "category": "other", "text": "This is an Important memory-safety flaw in libsolv's PGP verification component, which can be triggered by specially crafted Ed25519 signatures. The vulnerability allows for a stack-based buffer overflow, potentially leading to a denial of service in automated package or repository processing workflows when verifying attacker-controlled signed content or metadata. This vulnerability doesn't affect any support Red Hat products as the vulnerable function is only compiled when `ENABLE_PUBKEY` configuration is enabled during build time. Such configuration option is disabled when the `libsolv` package is built for Red Hat Enterprise Linux versions, thus the affected code is not present in the final distributed binary.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "known_not_affected": [ "red_hat_enterprise_linux_10:libsolv", "red_hat_enterprise_linux_10:libsolv-devel", "red_hat_enterprise_linux_10:libsolv-tools", "red_hat_enterprise_linux_10:libsolv-tools-base", "red_hat_enterprise_linux_10:libsolv.src", "red_hat_enterprise_linux_10:python3-solv", "red_hat_enterprise_linux_7:libsolv", "red_hat_enterprise_linux_7:libsolv-demo", "red_hat_enterprise_linux_7:libsolv-devel", "red_hat_enterprise_linux_7:libsolv-tools", "red_hat_enterprise_linux_7:libsolv.src", "red_hat_enterprise_linux_7:python2-solv", "red_hat_enterprise_linux_8:libsolv", "red_hat_enterprise_linux_8:libsolv-devel", "red_hat_enterprise_linux_8:libsolv-tools", "red_hat_enterprise_linux_8:libsolv.src", "red_hat_enterprise_linux_8:python3-solv", "red_hat_enterprise_linux_9:libsolv", "red_hat_enterprise_linux_9:libsolv-devel", "red_hat_enterprise_linux_9:libsolv-tools", "red_hat_enterprise_linux_9:libsolv.src", "red_hat_enterprise_linux_9:python3-solv", "red_hat_hardened_images:libsolv.src", "red_hat_openshift_container_platform_4:rhcos", "red_hat_satellite_6:libsolv.src::satellite-capsule:el8", "red_hat_satellite_6:libsolv::satellite-capsule:el8", "red_hat_satellite_6:python2-solv::satellite-capsule:el8", "red_hat_satellite_6:python3-solv::satellite-capsule:el8", "red_hat_update_infrastructure_4_for_cloud_providers:libsolv.src" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2026-48863" }, { "category": "external", "summary": "RHBZ#2460975", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460975" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2026-48863", "url": "https://www.cve.org/CVERecord?id=CVE-2026-48863" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-48863", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48863" }, { "category": "external", "summary": "https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592", "url": "https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592" } ], "release_date": "2026-05-26T18:53:04.400000+00:00", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "products": [ "red_hat_enterprise_linux_10:libsolv", "red_hat_enterprise_linux_10:libsolv-devel", "red_hat_enterprise_linux_10:libsolv-tools", "red_hat_enterprise_linux_10:libsolv-tools-base", "red_hat_enterprise_linux_10:libsolv.src", "red_hat_enterprise_linux_10:python3-solv", "red_hat_enterprise_linux_7:libsolv", "red_hat_enterprise_linux_7:libsolv-demo", "red_hat_enterprise_linux_7:libsolv-devel", "red_hat_enterprise_linux_7:libsolv-tools", "red_hat_enterprise_linux_7:libsolv.src", "red_hat_enterprise_linux_7:python2-solv", "red_hat_enterprise_linux_8:libsolv", "red_hat_enterprise_linux_8:libsolv-devel", "red_hat_enterprise_linux_8:libsolv-tools", "red_hat_enterprise_linux_8:libsolv.src", "red_hat_enterprise_linux_8:python3-solv", "red_hat_enterprise_linux_9:libsolv", "red_hat_enterprise_linux_9:libsolv-devel", "red_hat_enterprise_linux_9:libsolv-tools", "red_hat_enterprise_linux_9:libsolv.src", "red_hat_enterprise_linux_9:python3-solv", "red_hat_hardened_images:libsolv.src", "red_hat_openshift_container_platform_4:rhcos", "red_hat_satellite_6:libsolv.src::satellite-capsule:el8", "red_hat_satellite_6:libsolv::satellite-capsule:el8", "red_hat_satellite_6:python2-solv::satellite-capsule:el8", "red_hat_satellite_6:python3-solv::satellite-capsule:el8", "red_hat_update_infrastructure_4_for_cloud_providers:libsolv.src" ] } ], "threats": [ { "category": "impact", "details": "Important", "product_ids": [ "red_hat_enterprise_linux_10:libsolv", "red_hat_enterprise_linux_10:libsolv-devel", "red_hat_enterprise_linux_10:libsolv-tools", "red_hat_enterprise_linux_10:libsolv-tools-base", "red_hat_enterprise_linux_10:libsolv.src", "red_hat_enterprise_linux_10:python3-solv", "red_hat_enterprise_linux_7:libsolv", "red_hat_enterprise_linux_7:libsolv-demo", "red_hat_enterprise_linux_7:libsolv-devel", "red_hat_enterprise_linux_7:libsolv-tools", "red_hat_enterprise_linux_7:libsolv.src", "red_hat_enterprise_linux_7:python2-solv", "red_hat_enterprise_linux_8:libsolv", "red_hat_enterprise_linux_8:libsolv-devel", "red_hat_enterprise_linux_8:libsolv-tools", "red_hat_enterprise_linux_8:libsolv.src", "red_hat_enterprise_linux_8:python3-solv", "red_hat_enterprise_linux_9:libsolv", "red_hat_enterprise_linux_9:libsolv-devel", "red_hat_enterprise_linux_9:libsolv-tools", "red_hat_enterprise_linux_9:libsolv.src", "red_hat_enterprise_linux_9:python3-solv", "red_hat_hardened_images:libsolv.src", "red_hat_openshift_container_platform_4:rhcos", "red_hat_satellite_6:libsolv.src::satellite-capsule:el8", "red_hat_satellite_6:libsolv::satellite-capsule:el8", "red_hat_satellite_6:python2-solv::satellite-capsule:el8", "red_hat_satellite_6:python3-solv::satellite-capsule:el8", "red_hat_update_infrastructure_4_for_cloud_providers:libsolv.src" ] } ], "title": "libsolv: Stack-based buffer overflow in libsolv EdDSA PGP signature verification allows denial of service" } ] }