{"id":"CVE-2026-74222","aliases":["EUVD-2026-89435","GHSA-fm4f-g9jh-3qfq","UBUNTU-CVE-2026-74222","USN-8930-1","USN-8930-2"],"status":"published","title":"U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback","description":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.","severity":{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00299,"percentile":0.22866,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2026-09-29T21:29:23Z","modified":"2026-10-28T11:12:17Z","fixes":[{"ecosystem":"Ubuntu:24.04:LTS","package":"u-boot","fixed_in":["2025.10-0ubuntu0.24.04.4"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.10","package":"u-boot","fixed_in":["2025.10-0ubuntu6"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"u-boot","fixed_in":["2025.10-0ubuntu2.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"u-boot-nezha","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2021.09+git20211008.62392d3-0ubuntu1","2022.04+git20220405.7446a472-0ubuntu0.1","2022.04+git20220405.7446a472-0ubuntu0.2","2022.04+git20220405.7446a472-0ubuntu0.3","2022.04+git20220405.7446a472-0ubuntu0.4"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2025.10-0ubuntu0.24.04.4"}]}],"versions":["2023.07+dfsg-1ubuntu2","2024.01+dfsg-1ubuntu1","2024.01+dfsg-1ubuntu2","2024.01+dfsg-1ubuntu3","2024.01+dfsg-1ubuntu4","2024.01+dfsg-1ubuntu5","2024.01+dfsg-1ubuntu5.1","2024.01+dfsg-1ubuntu5.2","2025.01-0ubuntu0.24.04.1","2025.01-0ubuntu0.24.04.2","2025.10-0ubuntu0.24.04.1","2025.10-0ubuntu0.24.04.2","2025.10-0ubuntu0.24.04.3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"u-boot-nezha","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2022.10-1089-g528ae9bc6c-0ubuntu2","2024.01~rc1-190-g2e89b706f5-0ubuntu1","2024.01~rc1-190-g2e89b706f5-0ubuntu2","2024.01~rc1-190-g2e89b706f5-0ubuntu2.24.04.2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2025.10-0ubuntu6"}]}],"versions":["2025.10-0ubuntu2","2025.10-0ubuntu3","2025.10-0ubuntu4","2025.10-0ubuntu5"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2025.10-0ubuntu2.2"}]}],"versions":["2025.01-3ubuntu4","2025.10-0ubuntu1","2025.10-0ubuntu2","2025.10-0ubuntu2.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2016.01+dfsg1-2ubuntu5+esm2"}]}],"versions":["2015.04+dfsg1-2ubuntu1","2015.10+dfsg1-2","2015.10+dfsg1-3","2015.10+dfsg1-4","2016.01+dfsg1-1","2016.01+dfsg1-1ubuntu1","2016.01+dfsg1-2ubuntu1","2016.01+dfsg1-2ubuntu2","2016.01+dfsg1-2ubuntu3","2016.01+dfsg1-2ubuntu5","2016.01+dfsg1-2ubuntu5+esm1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.10+dfsg-1ubuntu0~18.04.3+esm2"}]}],"versions":["2016.03+dfsg1-6ubuntu2","2018.07~rc3+dfsg1-0ubuntu1~18.04.1","2018.07~rc3+dfsg1-0ubuntu2~18.04.1","2018.07~rc3+dfsg1-0ubuntu3~18.04.1","2019.07+dfsg-1ubuntu4~18.04.1","2020.10+dfsg-1ubuntu0~18.04.2","2020.10+dfsg-1ubuntu0~18.04.3","2020.10+dfsg-1ubuntu0~18.04.3+esm1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.01+dfsg-3ubuntu0~20.04.6+esm2"}]}],"versions":["2019.07+dfsg-1ubuntu3","2019.07+dfsg-1ubuntu5","2019.07+dfsg-1ubuntu6","2020.10+dfsg-1ubuntu0~20.04.2","2021.01+dfsg-3ubuntu0~20.04.1","2021.01+dfsg-3ubuntu0~20.04.3","2021.01+dfsg-3ubuntu0~20.04.4","2021.01+dfsg-3ubuntu0~20.04.5","2021.01+dfsg-3ubuntu0~20.04.6","2021.01+dfsg-3ubuntu0~20.04.6+esm1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.01+dfsg-2ubuntu2.9"}]}],"versions":["2021.07+dfsg-0ubuntu8","2021.07+dfsg-0ubuntu9","2021.07+dfsg-0ubuntu10","2022.01+dfsg-2ubuntu1","2022.01+dfsg-2ubuntu2","2022.01+dfsg-2ubuntu2.1","2022.01+dfsg-2ubuntu2.3","2022.01+dfsg-2ubuntu2.4","2022.01+dfsg-2ubuntu2.5","2022.01+dfsg-2ubuntu2.6","2022.01+dfsg-2ubuntu2.7","2022.01+dfsg-2ubuntu2.8"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2025.10-0ubuntu0.24.04.4"}]}],"versions":["2023.07+dfsg-1ubuntu2","2024.01+dfsg-1ubuntu1","2024.01+dfsg-1ubuntu2","2024.01+dfsg-1ubuntu3","2024.01+dfsg-1ubuntu4","2024.01+dfsg-1ubuntu5","2024.01+dfsg-1ubuntu5.1","2024.01+dfsg-1ubuntu5.2","2025.01-0ubuntu0.24.04.1","2025.01-0ubuntu0.24.04.2","2025.10-0ubuntu0.24.04.1","2025.10-0ubuntu0.24.04.2","2025.10-0ubuntu0.24.04.3"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2025.10-0ubuntu2.2"}]}],"versions":["2025.01-3ubuntu4","2025.10-0ubuntu1","2025.10-0ubuntu2","2025.10-0ubuntu2.1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2025.10-0ubuntu6"}]}],"versions":["2025.10-0ubuntu2","2025.10-0ubuntu3","2025.10-0ubuntu4","2025.10-0ubuntu5"],"bundled":4}],"products":[{"vendor":"denx software engineering","product":"u-boot"},{"vendor":"u-boot","product":"u-boot"}],"references":[{"url":"https://github.com/u-boot/u-boot/commit/2d94618a58aeb7630f18eee33419ce48d0fd3616","tags":["patch","fix","report"]},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/lwip/wget.c#L194","tags":["technical-description","article","report"]},{"url":"https://github.com/u-boot/u-boot","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-use-after-free-in-lwip-wget-receive-callback","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74222","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-fm4f-g9jh-3qfq"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74222.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-74222","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74222","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8930-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-8930-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-74220","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-74221","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-74225","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-74222","title":"U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback","description":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.","status":"published","published":"2026-09-29T21:29:23.96Z","modified":"2026-10-02T12:30:17.284Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:20:03.081354Z"}],"euvd":[{"id":"EUVD-2026-89435","description":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.","status":"published","published":"2026-09-29T21:29:23Z","modified":"2026-10-02T12:30:17Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:43.134956Z"}],"ghsa":[{"id":"GHSA-fm4f-g9jh-3qfq","title":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function...","description":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.","status":"published","published":"2026-09-30T00:32:29Z","modified":"2026-09-30T00:32:30Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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":"high"},{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:12:35.132592Z"}],"nvd":[{"id":"CVE-2026-74222","description":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.","status":"published","published":"2026-09-29T22:18:33.66Z","modified":"2026-10-02T13:17:54.703Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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":"high","assessor":"secondary"},{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"CVE-2026-74222","title":"U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback","description":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.","status":"published","published":"2026-09-29T21:29:23.96Z","modified":"2026-10-28T11:12:17.551690378Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:45:16.365946Z"},{"id":"UBUNTU-CVE-2026-74222","description":"U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.","status":"published","published":"2026-09-29T22:18:00Z","modified":"2026-10-21T23:11:56.494932371Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"},{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:57:08.628462Z"},{"id":"USN-8930-1","title":"u-boot vulnerabilities","description":"Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot\nincorrectly handled certain NFS READ and NFS READLINK responses. An\nattacker could possibly use this issue to trigger a buffer overflow,\nresulting in a denial of service or arbitrary code execution.\n(CVE-2026-74220, CVE-2026-74221)\n\nShahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot\nincorrectly handled certain HTTP data storage failures in its lwIP\nimplementation. An attacker could possibly use this issue to trigger a\nuse-after-free, resulting in a denial of service. This issue only\naffected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-74222)\n\nShahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot did not\nproperly validate certain DHCPv6 option lengths during network boot. An\nattacker could possibly use this issue to trigger out-of-bounds memory\naccess, resulting in a denial of service. This issue only affected\nUbuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-74225)","status":"published","published":"2026-10-14T16:23:58Z","modified":"2026-10-17T13:11:53.933670443Z","updated_at":"2026-11-02T16:58:26.907654Z"},{"id":"USN-8930-2","title":"u-boot vulnerabilities","description":"USN-8930-1 fixed some vulnerabilities in U-Boot. This update provides the\ncorresponding fix for U-Boot on Ubuntu 26.10.\n\nOriginal advisory details:\n\n Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot\nincorrectly handled certain NFS READ and NFS READLINK responses. An\nattacker could possibly use this issue to trigger a buffer overflow,\nresulting in a denial of service or arbitrary code execution.\n(CVE-2026-74220, CVE-2026-74221)\n\n Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot\nincorrectly handled certain HTTP data storage failures in its lwIP\nimplementation. An attacker could possibly use this issue to trigger a\nuse-after-free, resulting in a denial of service. (CVE-2026-74222)\n\n Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot did not\nproperly validate certain DHCPv6 option lengths during network boot. An\nattacker could possibly use this issue to trigger out-of-bounds memory\naccess, resulting in a denial of service. (CVE-2026-74225)","status":"published","published":"2026-10-21T15:57:11Z","modified":"2026-10-21T23:13:03.440289031Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}