{"id":"DEBIAN-CVE-2022-48906","details":"In the Linux kernel, the following vulnerability has been resolved:  mptcp: Correctly set DATA_FIN timeout when number of retransmits is large  Syzkaller with UBSAN uncovered a scenario where a large number of DATA_FIN retransmits caused a shift-out-of-bounds in the DATA_FIN timeout calculation:  ================================================================================ UBSAN: shift-out-of-bounds in net/mptcp/protocol.c:470:29 shift exponent 32 is too large for 32-bit type 'unsigned int' CPU: 1 PID: 13059 Comm: kworker/1:0 Not tainted 5.17.0-rc2-00630-g5fbf21c90c60 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Workqueue: events mptcp_worker Call Trace:  \u003cTASK\u003e  __dump_stack lib/dump_stack.c:88 [inline]  dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106  ubsan_epilogue+0xb/0x5a lib/ubsan.c:151  __ubsan_handle_shift_out_of_bounds.cold+0xb2/0x20e lib/ubsan.c:330  mptcp_set_datafin_timeout net/mptcp/protocol.c:470 [inline]  __mptcp_retrans.cold+0x72/0x77 net/mptcp/protocol.c:2445  mptcp_worker+0x58a/0xa70 net/mptcp/protocol.c:2528  process_one_work+0x9df/0x16d0 kernel/workqueue.c:2307  worker_thread+0x95/0xe10 kernel/workqueue.c:2454  kthread+0x2f4/0x3b0 kernel/kthread.c:377  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295  \u003c/TASK\u003e ================================================================================  This change limits the maximum timeout by limiting the size of the shift, which keeps all intermediate values in-bounds.","modified":"2026-08-27T23:04:45.920881741Z","published":"2024-08-22T02:15:05.120Z","upstream":["CVE-2022-48906"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-48906"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.14-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48906.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.14-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48906.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.14-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48906.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"}]}