{"id":"DEBIAN-CVE-2021-47297","details":"In the Linux kernel, the following vulnerability has been resolved:  net: fix uninit-value in caif_seqpkt_sendmsg  When nr_segs equal to zero in iovec_from_user, the object msg-\u003emsg_iter.iov is uninit stack memory in caif_seqpkt_sendmsg which is defined in ___sys_sendmsg. So we cann't just judge msg-\u003emsg_iter.iov-\u003ebase directlly. We can use nr_segs to judge msg in caif_seqpkt_sendmsg whether has data buffers.  ===================================================== BUG: KMSAN: uninit-value in caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542 Call Trace:  __dump_stack lib/dump_stack.c:77 [inline]  dump_stack+0x1c9/0x220 lib/dump_stack.c:118  kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118  __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215  caif_seqpkt_sendmsg+0x693/0xf60 net/caif/caif_socket.c:542  sock_sendmsg_nosec net/socket.c:652 [inline]  sock_sendmsg net/socket.c:672 [inline]  ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343  ___sys_sendmsg net/socket.c:2397 [inline]  __sys_sendmmsg+0x808/0xc90 net/socket.c:2480  __compat_sys_sendmmsg net/compat.c:656 [inline]","modified":"2026-09-15T09:02:31.274514205Z","published":"2024-05-21T15:15:17.553Z","upstream":["CVE-2021-47297"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-47297"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47297.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47297.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.14.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47297.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}