{"id":"DEBIAN-CVE-2023-53121","details":"In the Linux kernel, the following vulnerability has been resolved:  tcp: tcp_make_synack() can be called from process context  tcp_rtx_synack() now could be called in process context as explained in 0a375c822497 (\"tcp: tcp_rtx_synack() can be called from process context\").  tcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU variables with preemption enabled. This causes the following BUG:      BUG: using __this_cpu_add() in preemptible [00000000] code: ThriftIO1/5464     caller is tcp_make_synack+0x841/0xac0     Call Trace:      \u003cTASK\u003e      dump_stack_lvl+0x10d/0x1a0      check_preemption_disabled+0x104/0x110      tcp_make_synack+0x841/0xac0      tcp_v6_send_synack+0x5c/0x450      tcp_rtx_synack+0xeb/0x1f0      inet_rtx_syn_ack+0x34/0x60      tcp_check_req+0x3af/0x9e0      tcp_rcv_state_process+0x59b/0x2030      tcp_v6_do_rcv+0x5f5/0x700      release_sock+0x3a/0xf0      tcp_sendmsg+0x33/0x40      ____sys_sendmsg+0x2f2/0x490      __sys_sendmsg+0x184/0x230      do_syscall_64+0x3d/0x90  Avoid calling __TCP_INC_STATS() with will touch per-cpu variables. Use TCP_INC_STATS() which is safe to be called from context switch.","modified":"2026-09-15T09:03:01.733509828Z","published":"2025-05-02T16:15:31.173Z","upstream":["CVE-2023-53121"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53121"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53121.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53121.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53121.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"}]}