{"id":"CVE-2026-8836","aliases":["DEBIAN-CVE-2026-8836","EUVD-2026-30793","GHSA-3w8m-3w76-f6mh","OESA-2026-2480","UBUNTU-CVE-2026-8836"],"status":"published","title":"lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01097,"percentile":0.65885,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119","CWE-121"],"published":"2026-05-18T18:45:12Z","modified":"2026-10-31T19:10:03Z","fixes":[{"ecosystem":"Debian:13","package":"lwip","fixed_in":["2.2.1+dfsg1-1+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"lwip","fixed_in":["2.2.1+dfsg1-5"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS","package":"lwip","fixed_in":["2.2.0-76.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"lwip","fixed_in":["2.2.0-76.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"lwip","fixed_in":["2.2.0-76.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP4","package":"lwip","fixed_in":["2.2.0-76.oe2003sp4"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"lwip","fixed_in":["2.2.0-76.oe2203sp4"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"lwip","fixed_in":["2.1.2+dfsg1-4ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:22.04:LTS","package":"lwip","fixed_in":["2.1.3+dfsg1-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:24.04:LTS","package":"lwip","fixed_in":["2.2.0+dfsg1-6.1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:26.04:LTS","package":"lwip","fixed_in":["2.2.1+dfsg1-4ubuntu0.1~esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.3+dfsg1-2","2.1.3+dfsg1-3","2.1.3+dfsg1-4","2.2.0+dfsg1-1","2.2.0+dfsg1-2","2.2.0+dfsg1-3","2.2.0+dfsg1-4","2.2.0+dfsg1-5","2.2.0+dfsg1-6","2.2.0+dfsg1-6.1","2.2.0+dfsg1-6.1~exp1","2.2.0+dfsg1-7","2.2.0+dfsg1-8","2.2.0+dfsg1-9","2.2.1+dfsg1-1","2.2.1+dfsg1-2","2.2.1+dfsg1-3","2.2.1+dfsg1-4","2.2.1+dfsg1-5","2.2.1+dfsg1-6","2.2.1+dfsg1-7"]},{"source":"osv","ecosystem":"Debian:13","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.1+dfsg1-1+deb13u1"}]}],"versions":["2.2.1+dfsg1-1"]},{"source":"osv","ecosystem":"Debian:14","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.1+dfsg1-5"}]}],"versions":["2.2.1+dfsg1-1","2.2.1+dfsg1-2","2.2.1+dfsg1-3","2.2.1+dfsg1-4"]},{"source":"osv","ecosystem":"openEuler:24.03-LTS","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0-76.oe2403sp3"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0-76.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0-76.oe2403sp3"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP4","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0-76.oe2003sp4"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0-76.oe2203sp4"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.2+dfsg1-4ubuntu0.1~esm1"}]}],"versions":["2.1.2-3","2.1.2-5.1","2.1.2+dfsg1-1","2.1.2+dfsg1-4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.3+dfsg1-1ubuntu0.1~esm1"}]}],"versions":["2.1.2+dfsg1-8","2.1.2+dfsg1-9","2.1.3+dfsg1-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0+dfsg1-6.1ubuntu0.1~esm1"}]}],"versions":["2.1.3+dfsg1-2","2.1.3+dfsg1-4","2.2.0+dfsg1-2","2.2.0+dfsg1-3","2.2.0+dfsg1-4","2.2.0+dfsg1-5","2.2.0+dfsg1-6","2.2.0+dfsg1-6.1","2.2.0+dfsg1-6.1build1","2.2.0+dfsg1-6.1build2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1+dfsg1-1","2.2.1+dfsg1-2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1+dfsg1-4","2.2.1+dfsg1-5","2.2.1+dfsg1-7"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.1+dfsg1-4ubuntu0.1~esm1"}]}],"versions":["2.2.1+dfsg1-2","2.2.1+dfsg1-3","2.2.1+dfsg1-4"]}],"references":[{"url":"https://vuldb.com/vuln/364474","tags":["vdb-entry","technical-description","advisory","report"]},{"url":"https://vuldb.com/vuln/364474/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-8836","tags":["third-party-advisory","advisory"]},{"url":"https://vuldb.com/submit/829798","tags":["third-party-advisory","advisory","report"]},{"url":"https://savannah.nongnu.org/bugs/?68055","tags":["broken-link","web"]},{"url":"https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c","tags":["broken-link","patch","fix","report"]},{"url":"https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c","tags":["patch","fix","report"]},{"url":"https://savannah.nongnu.org/bugs/?68194","tags":["broken-link","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8836","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-3w8m-3w76-f6mh"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8836.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-8836","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2480","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-8836","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-8836","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8423-1","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-8836","title":"lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.","status":"published","published":"2026-05-18T18:45:12.791Z","modified":"2026-08-22T08:42:12.843Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"critical","assessor":"cna"},{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"critical","assessor":"cna"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C","assessor":"cna"}],"cwes":["CWE-121","CWE-119"],"updated_at":"2026-11-02T13:48:13.398044Z"}],"euvd":[{"id":"EUVD-2026-30793","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.","status":"published","published":"2026-05-18T18:45:12Z","modified":"2026-08-22T08:42:12Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","level":"critical"}],"updated_at":"2026-11-02T18:01:36.154425Z"}],"ghsa":[{"id":"GHSA-3w8m-3w76-f6mh","title":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame...","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue.","status":"published","published":"2026-05-18T21:31:50Z","modified":"2026-08-22T09:31:28Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:10:50.919771Z"}],"nvd":[{"id":"CVE-2026-8836","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.","status":"published","published":"2026-05-18T19:16:28.533Z","modified":"2026-08-22T09:16:53.713Z","cvss":[{"version":"4.0","score":8.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"secondary"}],"cwes":["CWE-119","CWE-121"],"updated_at":"2026-11-02T14:12:19.39893Z"}],"osv":[{"id":"CVE-2026-8836","title":"lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.","status":"published","published":"2026-05-18T18:45:12.791Z","modified":"2026-10-31T19:10:03.771618925Z","cvss":[{"version":"4.0","score":8.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","level":"high"}],"cwes":["CWE-119","CWE-121"],"updated_at":"2026-11-02T15:45:19.210277Z"},{"id":"DEBIAN-CVE-2026-8836","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.","status":"published","published":"2026-05-18T19:16:28.533Z","modified":"2026-10-01T03:03:53.776799773Z","cvss":[{"version":"4.0","score":8.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:46:05.506112Z"},{"id":"UBUNTU-CVE-2026-8836","description":"A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.","status":"published","published":"2026-05-18T19:16:00Z","modified":"2026-10-17T13:01:15.65220125Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"4.0","score":8.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","level":"high"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"OESA-2026-2480","title":"lwip security update","description":"lwip is a small independent implementation of the TCP/IP protocol suite.\r\n\r\nSecurity Fix(es):\n\nA vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue.(CVE-2026-8836)","status":"published","published":"2026-05-29T11:11:26Z","modified":"2026-08-06T11:11:26Z","updated_at":"2026-11-02T15:52:46.449097Z"}]}}