{"id":"CVE-2022-49728","summary":"ipv6: Fix signed integer overflow in __ip6_append_data","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: Fix signed integer overflow in __ip6_append_data\n\nResurrect ubsan overflow checks and ubsan report this warning,\nfix it by change the variable [length] type to size_t.\n\nUBSAN: signed-integer-overflow in net/ipv6/ip6_output.c:1489:19\n2147479552 + 8567 cannot be represented in type 'int'\nCPU: 0 PID: 253 Comm: err Not tainted 5.16.0+ #1\nHardware name: linux,dummy-virt (DT)\nCall trace:\n  dump_backtrace+0x214/0x230\n  show_stack+0x30/0x78\n  dump_stack_lvl+0xf8/0x118\n  dump_stack+0x18/0x30\n  ubsan_epilogue+0x18/0x60\n  handle_overflow+0xd0/0xf0\n  __ubsan_handle_add_overflow+0x34/0x44\n  __ip6_append_data.isra.48+0x1598/0x1688\n  ip6_append_data+0x128/0x260\n  udpv6_sendmsg+0x680/0xdd0\n  inet6_sendmsg+0x54/0x90\n  sock_sendmsg+0x70/0x88\n  ____sys_sendmsg+0xe8/0x368\n  ___sys_sendmsg+0x98/0xe0\n  __sys_sendmmsg+0xf4/0x3b8\n  __arm64_sys_sendmmsg+0x34/0x48\n  invoke_syscall+0x64/0x160\n  el0_svc_common.constprop.4+0x124/0x300\n  do_el0_svc+0x44/0xc8\n  el0_svc+0x3c/0x1e8\n  el0t_64_sync_handler+0x88/0xb0\n  el0t_64_sync+0x16c/0x170\n\nChanges since v1:\n-Change the variable [length] type to unsigned, as Eric Dumazet suggested.\nChanges since v2:\n-Don't change exthdrlen type in ip6_make_skb, as Paolo Abeni suggested.\nChanges since v3:\n-Don't change ulen type in udpv6_sendmsg and l2tp_ip6_sendmsg, as\nJakub Kicinski suggested.","modified":"2026-04-02T08:27:52.335733Z","published":"2025-02-26T02:24:39.347Z","related":["SUSE-SU-2025:01600-1","SUSE-SU-2025:01983-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49728.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/70549c80fe80ac4e2a22068c76ebebced24f7e74"},{"type":"WEB","url":"https://git.kernel.org/stable/c/84dc940890e91e42898e4443a093281702440abf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f26422eabeb517629568edf8c2dd9c6cb9147584"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f93431c86b631bbca5614c66f966bf3ddb3c2803"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49728.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49728"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"},{"fixed":"f26422eabeb517629568edf8c2dd9c6cb9147584"},{"fixed":"70549c80fe80ac4e2a22068c76ebebced24f7e74"},{"fixed":"84dc940890e91e42898e4443a093281702440abf"},{"fixed":"f93431c86b631bbca5614c66f966bf3ddb3c2803"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49728.json"}}],"schema_version":"1.7.5"}