{"id":"CVE-2026-44028","aliases":["DEBIAN-CVE-2026-44028","EUVD-2026-27163","GHSA-jggj-j5fq-x969","GHSA-vh5x-56v6-4368","RHSA-2026:10208","RHSA-2026:10999","RHSA-2026:7046","RHSA-2026:9438","UBUNTU-CVE-2026-44028","openSUSE-SU-2026:10696-1"],"status":"published","title":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the...","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0018,"percentile":0.07635,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-674"],"published":"2026-05-05T00:00:00Z","modified":"2026-10-28T02:31:09Z","fixes":[{"ecosystem":"Debian:14","package":"nix","fixed_in":["2.34.8+dfsg-1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"nix","fixed_in":["2.34.7-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"nix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.26.3+dfsg-1","2.32.5+dfsg-1","2.32.5+dfsg-2","2.34.3+dfsg-1","2.34.6+dfsg-1","2.34.8+dfsg-1"]},{"source":"osv","ecosystem":"Debian:14","package":"nix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.34.8+dfsg-1"}]}],"versions":["2.26.3+dfsg-1","2.32.5+dfsg-1","2.32.5+dfsg-2","2.34.3+dfsg-1","2.34.6+dfsg-1"]},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"chunkah","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.4.0-1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"python3-ruff","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.15.11-1.hum1"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"ruff","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.15.11-1.hum1"}]}],"bundled":3},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bootc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.14.0-0.1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"system-reinstall-bootc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.14.0-0.1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red 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project","product":"lix"},{"vendor":"nixos","product":"nix"}],"references":[{"url":"https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407","tags":["advisory","article","report"]},{"url":"https://github.com/NixOS/nix/security/advisories/GHSA-vh5x-56v6-4368","tags":["advisory","article","report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/05/04/33","tags":["web","article","report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/05/04/32","tags":["web","article"]},{"url":"https://lix.systems/blog/2026-05-05-lix-unsigned-integer-overflow/","tags":["article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44028","tags":["advisory"]},{"url":"https://lix.systems/blog/2026-05-05-lix-unsigned-integer-overflow"},{"url":"https://github.com/advisories/GHSA-jggj-j5fq-x969"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44028.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-44028","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:10208","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-44029","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-44028","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_10208.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466635","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-44028","tags":["advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466634","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-44029","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44029","tags":["advisory"]},{"url":"https://github.com/NixOS/nix/security/advisories/GHSA-gr92-w2r5-qw5p","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2026:10999","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-47423","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_10999.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2500564","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-47423","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47423","tags":["advisory"]},{"url":"https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea","tags":["article"]},{"url":"https://github.com/cure53/DOMPurify/releases/tag/3.4.5","tags":["article"]},{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2026:7046","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_7046.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:9438","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_9438.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-44028","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-44028","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-44028","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","status":"published","published":"2026-05-05T00:30:16.205Z","modified":"2026-05-09T03:40:06.637Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T13:42:49.132798Z"}],"euvd":[{"id":"EUVD-2026-27163","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","status":"published","published":"2026-05-05T00:30:16Z","modified":"2026-05-09T03:40:06Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T19:05:14.089367Z"}],"ghsa":[{"id":"GHSA-jggj-j5fq-x969","title":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the...","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","status":"published","published":"2026-05-05T03:31:41Z","modified":"2026-05-09T06:31:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T15:07:58.197878Z"}],"nvd":[{"id":"CVE-2026-44028","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","status":"published","published":"2026-05-05T01:16:06.983Z","modified":"2026-10-26T19:10:00.163Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T14:12:17.022502Z"}],"osv":[{"id":"CVE-2026-44028","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","status":"published","published":"2026-05-05T00:30:16.205Z","modified":"2026-10-28T02:31:09.164567176Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T15:45:04.820169Z"},{"id":"DEBIAN-CVE-2026-44028","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","status":"published","published":"2026-05-05T01:16:06.983Z","modified":"2026-10-27T09:47:42.377141733Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:55.669088Z"},{"id":"RHSA-2026:10208","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-07-16T10:03:33Z","modified":"2026-09-22T10:07:19Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:18.066978Z"},{"id":"RHSA-2026:10999","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-07-13T10:03:36Z","modified":"2026-10-16T10:10:23Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:18.066978Z"},{"id":"RHSA-2026:7046","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-07-16T10:11:27Z","modified":"2026-10-06T10:31:23.39823274Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:22.928316Z"},{"id":"RHSA-2026:9438","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-07-16T10:12:12Z","modified":"2026-10-06T10:30:10.894713046Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.969672Z"},{"id":"UBUNTU-CVE-2026-44028","description":"An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).","status":"published","published":"2026-05-05T01:16:00Z","modified":"2026-10-17T12:58:18.428466419Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:56:22.075798Z"},{"id":"openSUSE-SU-2026:10696-1","title":"nix-2.34.7-1.1 on GA media","description":"These are all security issues fixed in the nix-2.34.7-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-05-05T00:00:00Z","modified":"2026-05-06T08:01:16.238272Z","updated_at":"2026-11-02T16:58:38.415593Z"}]}}