{"id":"CVE-2026-11623","aliases":["AZL-90188","BELL-CVE-2026-11623","DEBIAN-CVE-2026-11623","EUVD-2026-35297","GHSA-4cw9-jpqf-99x8","MGASA-2026-0255","UBUNTU-CVE-2026-11623","USN-8428-1","openSUSE-SU-2026:11006-1"],"status":"published","title":"tmux image.c image_free use after free","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","severity":{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00124,"percentile":0.02168,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119","CWE-416"],"published":"2026-06-09T03:15:12Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Azure Linux:3","package":"tmux","fixed_in":["3.4-2"],"sources":["osv"]},{"ecosystem":"Alpaquita:25","package":"tmux","fixed_in":["3.5a-r1"],"sources":["osv"]},{"ecosystem":"Alpaquita:stream","package":"tmux","fixed_in":["3.6b-r0"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"tmux","fixed_in":["3.6b-1"],"sources":["osv"]},{"ecosystem":"Mageia:10","package":"tmux","fixed_in":["3.7b-1.mga10"],"sources":["osv"]},{"ecosystem":"Mageia:9","package":"tmux","fixed_in":["3.6b-1.mga9"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"tmux","fixed_in":["3.6a-2ubuntu0.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"tmux","fixed_in":["3.6b-2.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4-2"}]}]},{"source":"osv","ecosystem":"Alpaquita:25","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.5a-r0"},{"fixed":"3.5a-r1"}]}]},{"source":"osv","ecosystem":"Alpaquita:stream","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4-r1"},{"fixed":"3.6b-r0"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6b-1"}]}],"versions":["3.5a-3","3.6a-1","3.6a-2","3.6b-1~bpo13+1"]},{"source":"osv","ecosystem":"Mageia:10","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7b-1.mga10"}]}]},{"source":"osv","ecosystem":"Mageia:9","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6b-1.mga9"}]}]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6a-2ubuntu0.1"}]}],"versions":["3.5a-3build1","3.6a-1","3.6a-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6a-2ubuntu0.1"}]}],"versions":["3.5a-3build1","3.6a-1","3.6a-2"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"tmux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6b-2.1"}]}]}],"products":[{"vendor":"ubuntu","product":"tmux"}],"references":[{"url":"https://vuldb.com/vuln/369303","tags":["vdb-entry","technical-description","advisory","report"]},{"url":"https://vuldb.com/vuln/369303/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-11623","tags":["third-party-advisory","advisory","report"]},{"url":"https://vuldb.com/submit/835623","tags":["third-party-advisory","advisory","report"]},{"url":"https://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cb","tags":["exploit","evidence","report"]},{"url":"https://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03","tags":["patch","fix"]},{"url":"https://github.com/tmux/tmux/releases/tag/3.7-rc","tags":["patch","fix","report"]},{"url":"https://github.com/tmux/tmux/","tags":["product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11623","tags":["web","advisory"]},{"url":"https://github.com/tmux/tmux"},{"url":"https://github.com/advisories/GHSA-4cw9-jpqf-99x8"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-11623","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11623.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-11623","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0255.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35707","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/JVGG2ZBPVOPNK5Y7WPDQEXHRCDE2YTE6/","tags":["web"]},{"url":"https://www.openwall.com/lists/oss-security/2026/06/15/7","tags":["web"]},{"url":"https://ubuntu.com/security/notices/USN-8428-1","tags":["advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z334OXN5QPJGUAUI4P3JF4PNWDEWRM25/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2026-11623","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-11623","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-11623","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-11623","title":"tmux image.c image_free use after free","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T03:15:12.467Z","modified":"2026-06-23T04:49:28.666Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","level":"low","assessor":"cna"},{"version":"3.1","score":4.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"3.0","score":4.5,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"2.0","score":3.5,"vector":"AV:L/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C","assessor":"cna"}],"cwes":["CWE-416","CWE-119"],"updated_at":"2026-11-02T14:20:04.463704Z"}],"euvd":[{"id":"EUVD-2026-35297","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T03:15:12Z","modified":"2026-06-23T04:49:28Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","level":"low"}],"updated_at":"2026-11-02T18:20:33.850201Z"}],"ghsa":[{"id":"GHSA-4cw9-jpqf-99x8","title":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function...","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T06:31:56Z","modified":"2026-06-09T06:32:01Z","cvss":[{"version":"4.0","score":1.1,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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":"low"},{"version":"3.1","score":4.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:08:40.238392Z"}],"nvd":[{"id":"CVE-2026-11623","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T05:16:30.227Z","modified":"2026-07-23T08:10:00.137Z","cvss":[{"version":"4.0","score":1.1,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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":"low","assessor":"secondary"},{"version":"3.1","score":4.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":3.5,"vector":"AV:L/AC:H/Au:S/C:P/I:P/A:P","level":"low","assessor":"secondary"}],"cwes":["CWE-119","CWE-416"],"updated_at":"2026-11-02T14:12:22.73178Z"}],"osv":[{"id":"BELL-CVE-2026-11623","status":"published","published":"2026-06-11T06:11:56.817306Z","modified":"2026-06-18T07:15:11.306362406Z","cvss":[{"version":"3.1","score":4.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:28:23.037038Z"},{"id":"CVE-2026-11623","title":"tmux image.c image_free use after free","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T03:15:12.467Z","modified":"2026-11-11T13:23:05.797008465Z","cvss":[{"version":"4.0","score":1.1,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","level":"low"}],"cwes":["CWE-119","CWE-416"],"updated_at":"2026-11-07T03:08:01.156605Z"},{"id":"DEBIAN-CVE-2026-11623","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T05:16:30.227Z","modified":"2026-10-01T03:01:40.639205564Z","cvss":[{"version":"4.0","score":1.1,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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":"low"}],"updated_at":"2026-11-02T15:45:50.923612Z"},{"id":"UBUNTU-CVE-2026-11623","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T05:16:00Z","modified":"2026-06-15T20:15:12.092493664Z","cvss":[{"version":"3.1","score":4.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","level":"medium"},{"version":"4.0","score":1.1,"vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","level":"low"}],"updated_at":"2026-11-02T16:56:00.081948Z"},{"id":"AZL-90188","title":"CVE-2026-11623 affecting package tmux for versions less than 3.4-2","description":"A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.","status":"published","published":"2026-06-09T05:16:30Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:25.633663Z"},{"id":"MGASA-2026-0255","title":"Updated tmux packages fix a security vulnerability","description":"The updated package fixes a security vulnerability:\ntmux image.c image_free use after free. (CVE-2026-11623)\n","status":"published","published":"2026-07-15T17:33:12Z","modified":"2026-07-15T17:45:05.009953414Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:11006-1","title":"tmux-3.6b-2.1 on GA media","description":"These are all security issues fixed in the tmux-3.6b-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-06-11T00:00:00Z","modified":"2026-06-12T08:45:05.912098245Z","updated_at":"2026-11-02T16:58:38.95195Z"},{"id":"USN-8428-1","title":"tmux vulnerability","description":"It was discovered that tmux incorrectly handled image cleanup, leading to\na use-after-free vulnerability. A local attacker could possibly use this\nissue to cause tmux to crash, resulting in a denial of service.","status":"published","published":"2026-06-15T13:03:51Z","modified":"2026-06-15T20:29:21.937780684Z","updated_at":"2026-11-02T16:58:25.103481Z"}]}}