clsa-2026:1790082267
csaf_tuxcare
Description
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 Cloud Linux Inc. and provide a link to the original.
Timeline
- Published
- 2026-09-22 13:05 UTC
- Last Modified
- 2026-09-22
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
{
"document": {
"aggregate_severity": {
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "TuxCare License Agreement",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "legal_disclaimer",
"text": "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 Cloud Linux Inc. and provide a link to the original.",
"title": "Terms of Use"
},
{
"category": "details",
"text": "* SECURITY UPDATE: Heap buffer overflow in CMS AES-WRAP-PAD key unwrap\n - debian/patches/CVE-2026-63072.patch: size the key-unwrap output buffer\n in crypto/cms/cms_kari.c for the worst case so a failed AES-WRAP-PAD\n unwrap cannot write 8 bytes past the allocation, with the upstream\n regression test in test/cmsapitest.c and test/recipes/80-test_cmsapi.t\n - CVE-2026-63072",
"title": "Details"
}
],
"publisher": {
"category": "vendor",
"contact_details": "https://tuxcare.com/contact/",
"name": "TuxCare",
"namespace": "https://tuxcare.com/"
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"references": [
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"category": "self",
"summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1790082267",
"url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1790082267"
},
{
"category": "self",
"summary": "Canonical URL",
"url": "https://security.tuxcare.com/csaf/v2/els_os/debian11els/advisories/2026/clsa-2026_1790082267.json"
}
],
"title": "Fix CVE(s): CVE-2026-63072",
"tracking": {
"current_release_date": "2026-09-22T13:05:15Z",
"generator": {
"date": "2026-09-22T13:05:15Z",
"engine": {
"name": "pyCSAF"
}
},
"id": "CLSA-2026:1790082267",
"initial_release_date": "2026-09-22T13:05:15Z",
"revision_history": [
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"date": "2026-09-22T13:05:15Z",
"number": "1",
"summary": "Initial version"
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"product_id": "Debian-11:libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els1.all"
},
"product_reference": "libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els1.all",
"relates_to_product_reference": "Debian-11"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64 as a component of Debian 11",
"product_id": "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64"
},
"product_reference": "libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64",
"relates_to_product_reference": "Debian-11"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.armel as a component of Debian 11",
"product_id": "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.armel"
},
"product_reference": "libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.armel",
"relates_to_product_reference": "Debian-11"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64 as a component of Debian 11",
"product_id": "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64"
},
"product_reference": "libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
"relates_to_product_reference": "Debian-11"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-63072",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"notes": [
{
"category": "description",
"text": "Issue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient's private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.",
"title": "Vulnerability description"
}
],
"product_status": {
"fixed": [
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els2.amd64",
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els2.armel",
"Debian-11:libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els2.all",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.amd64",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.armel",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.amd64",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.armel"
],
"known_affected": [
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64",
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.armel",
"Debian-11:libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els1.all",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els1.armel",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els1.armel"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://cve.tuxcare.com/els/cve/CVE-2026-63072"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/2a3dac874c8057c1f0186849bf1ede1ae7b6b756",
"url": "https://github.com/openssl/openssl/commit/2a3dac874c8057c1f0186849bf1ede1ae7b6b756"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/87784ad619af36b8807c2044b3940006fccc1e42",
"url": "https://github.com/openssl/openssl/commit/87784ad619af36b8807c2044b3940006fccc1e42"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/9530a5fd1aacaeccdced4478ea2340a480613335",
"url": "https://github.com/openssl/openssl/commit/9530a5fd1aacaeccdced4478ea2340a480613335"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/9ec2f6d2ae2bcad907cf7ee38584855bafe4979a",
"url": "https://github.com/openssl/openssl/commit/9ec2f6d2ae2bcad907cf7ee38584855bafe4979a"
},
{
"category": "external",
"summary": "https://github.com/openssl/openssl/commit/a0c8ec557d9cac078f032d76cdf684fe743eb382",
"url": "https://github.com/openssl/openssl/commit/a0c8ec557d9cac078f032d76cdf684fe743eb382"
},
{
"category": "external",
"summary": "https://openssl-library.org/news/secadv/20260825.txt",
"url": "https://openssl-library.org/news/secadv/20260825.txt"
}
],
"release_date": "2026-08-25T13:19:00Z",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-22T13:04:30.935534Z",
"details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1790082267",
"product_ids": [
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els2.amd64",
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els2.armel",
"Debian-11:libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els2.all",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.amd64",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
"Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.armel",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.amd64",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
"Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.armel"
],
"url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1790082267"
},
{
"category": "none_available",
"date": "2026-08-25T13:19:00Z",
"details": "Affected",
"product_ids": [
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64",
"Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
]
}
]
}