{"id":"DEBIAN-CVE-2022-48751","details":"In the Linux kernel, the following vulnerability has been resolved:  net/smc: Transitional solution for clcsock race issue  We encountered a crash in smc_setsockopt() and it is caused by accessing smc-\u003eclcsock after clcsock was released.   BUG: kernel NULL pointer dereference, address: 0000000000000020  #PF: supervisor read access in kernel mode  #PF: error_code(0x0000) - not-present page  PGD 0 P4D 0  Oops: 0000 [#1] PREEMPT SMP PTI  CPU: 1 PID: 50309 Comm: nginx Kdump: loaded Tainted: G E     5.16.0-rc4+ #53  RIP: 0010:smc_setsockopt+0x59/0x280 [smc]  Call Trace:   \u003cTASK\u003e   __sys_setsockopt+0xfc/0x190   __x64_sys_setsockopt+0x20/0x30   do_syscall_64+0x34/0x90   entry_SYSCALL_64_after_hwframe+0x44/0xae  RIP: 0033:0x7f16ba83918e   \u003c/TASK\u003e  This patch tries to fix it by holding clcsock_release_lock and checking whether clcsock has already been released before access.  In case that a crash of the same reason happens in smc_getsockopt() or smc_switch_to_fallback(), this patch also checkes smc-\u003eclcsock in them too. And the caller of smc_switch_to_fallback() will identify whether fallback succeeds according to the return value.","modified":"2026-09-01T16:05:28.877247975Z","published":"2024-06-20T12:15:13.310Z","upstream":["CVE-2022-48751"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-48751"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48751.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48751.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.16.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48751.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}