{ "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: buffer overrun in the script engine where copy\n operations wrote past the buffer end when a variable's length changed\n between the length and copy passes (e.g. captures or volatile variables\n with side effects), trailing uninitialised bytes could leak when the\n result was shorter than predicted, and an uninitialised memory read\n caused by stale regex captures could leak data or overrun the buffer\n - debian/patches/CVE-2026-42533.patch: add the e->end buffer-end pointer\n and ngx_http_script_check_length() guard to all script copy operations,\n extend the protection to direct script evaluation in the proxy, fastcgi,\n scgi, uwsgi, grpc, index and try_files modules and to the http and\n stream access log script engines, cut the result string to its\n actual size, and reset r->ncaptures when reallocating r->captures in\n src/http/ngx_http_script.{c,h}, src/stream/ngx_stream_script.{c,h},\n src/http/modules/ngx_http_*_module.c, src/stream/ngx_stream_log_module.c\n and src/http/ngx_http_variables.c\n - CVE-2026-42533", "title": "Details" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1784707592", "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1784707592" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_docker/debian13/advisories/2026/clsa-2026_1784707592.json" } ], "tracking": { "current_release_date": "2026-07-22T08:07:43Z", "generator": { "date": "2026-07-22T08:07:43Z", "engine": { "name": "pyCSAF" } }, "id": "CLSA-2026:1784707592", "initial_release_date": "2026-07-22T08:07:43Z", "revision_history": [ { "date": "2026-07-22T08:07:43Z", "number": "1", "summary": "Initial version" } ], "status": "final", "version": "1" }, "title": "Fix CVE(s): CVE-2026-42533, CVE-2026-49975" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Debian 13", "product": { "name": "Debian 13", "product_id": "Debian-13", "product_identification_helper": { "cpe": "cpe:2.3:o:debian:debian_linux:13:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Debian" } ], "category": "vendor", "name": "Software in the Public Interest, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64", "product": { "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64", "product_id": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/nginx1.27@1.27.5-1~trixie%2Btuxcare.els15?arch=arm64&os_name=debian&os_version=13" } } }, { "category": "product_version", "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.arm64", "product": { "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.arm64", "product_id": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.arm64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/nginx1.27@1.27.5-1~trixie%2Btuxcare.els13?arch=arm64&os_name=debian&os_version=13" } } }, { "category": "product_version", "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.arm64", "product": { "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.arm64", "product_id": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.arm64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/nginx1.27@1.27.5-1~trixie%2Btuxcare.els12?arch=arm64&os_name=debian&os_version=13" } } }, { "category": "product_version", "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.arm64", "product": { "name": 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"pkg:deb/tuxcare/nginx1.27@1.27.5-1~trixie%2Btuxcare.els5?arch=arm64&os_name=debian&os_version=13" } } }, { "category": "product_version", "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.arm64", "product": { "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.arm64", "product_id": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.arm64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/nginx1.27@1.27.5-1~trixie%2Btuxcare.els2?arch=arm64&os_name=debian&os_version=13" } } } ], "category": "architecture", "name": "arm64" }, { "branches": [ { "category": "product_version", "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "product": { "name": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "product_id": "nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/nginx1.27@1.27.5-1~trixie%2Btuxcare.els15?arch=amd64&os_name=debian&os_version=13" } } }, { "category": "product_version", "name": 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"vulnerabilities": [ { "cve": "CVE-2026-42533", "notes": [ { "category": "description", "text": "A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or to possibly trigger a code execution. There is no control plane exposure; this is a data plane issue only.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.", "title": "Vulnerability description" } ], "product_status": { "fixed": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64" ], "known_affected": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els1.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.arm64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els-docker/cve/CVE-2026-42533" } ], "remediations": [ { "category": "vendor_fix", "date": "2026-07-22T08:06:38.489481Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1784707592", "product_ids": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64" ], "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1784707592" }, { "category": "none_available", "details": "Affected", "product_ids": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els1.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.arm64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] }, { "cve": "CVE-2026-49975", "cwe": { "id": "CWE-409", "name": "Improper Handling of Highly Compressed Data (Data Amplification)" }, "notes": [ { "category": "description", "text": "Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests.\nThis issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.", "title": "Vulnerability description" }, { "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": { "fixed": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64" ], "known_affected": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els1.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.arm64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els-docker/cve/CVE-2026-49975" } ], "release_date": "2026-06-08T16:16:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-07-22T08:06:38.489481Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1784707592", "product_ids": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64" ], "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1784707592" }, { "category": "none_available", "date": "2026-06-08T16:16:00Z", "details": "Affected", "product_ids": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els1.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els10.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els12.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els13.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els2.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els5.arm64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els8.arm64" ] } ], "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": [ "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.amd64", "Debian-13:nginx1.27-0:1.27.5-1~trixie+tuxcare.els15.arm64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] } ] }