{"id":"DEBIAN-CVE-2023-53441","details":"In the Linux kernel, the following vulnerability has been resolved:  bpf: cpumap: Fix memory leak in cpu_map_update_elem  Syzkaller reported a memory leak as follows:  BUG: memory leak unreferenced object 0xff110001198ef748 (size 192):   comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)   hex dump (first 32 bytes):     00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00  ....J...........     00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff  ........(.......   backtrace:     [\u003cffffffffadd28087\u003e] __cpu_map_entry_alloc+0xf7/0xb00     [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0     [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520     [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720     [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90     [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40     [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6  BUG: memory leak unreferenced object 0xff110001198ef528 (size 192):   comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)   hex dump (first 32 bytes):     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................   backtrace:     [\u003cffffffffadd281f0\u003e] __cpu_map_entry_alloc+0x260/0xb00     [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0     [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520     [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720     [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90     [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40     [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6  BUG: memory leak unreferenced object 0xff1100010fd93d68 (size 8):   comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)   hex dump (first 8 bytes):     00 00 00 00 00 00 00 00                          ........   backtrace:     [\u003cffffffffade5db3e\u003e] kvmalloc_node+0x11e/0x170     [\u003cffffffffadd28280\u003e] __cpu_map_entry_alloc+0x2f0/0xb00     [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0     [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520     [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720     [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90     [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40     [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6  In the cpu_map_update_elem flow, when kthread_stop is called before calling the threadfn of rcpu-\u003ekthread, since the KTHREAD_SHOULD_STOP bit of kthread has been set by kthread_stop, the threadfn of rcpu-\u003ekthread will never be executed, and rcpu-\u003erefcnt will never be 0, which will lead to the allocated rcpu, rcpu-\u003equeue and rcpu-\u003equeue-\u003equeue cannot be released.  Calling kthread_stop before executing kthread's threadfn will return -EINTR. We can complete the release of memory resources in this state.","modified":"2026-09-15T09:02:51.214723590Z","published":"2025-09-18T16:15:48.353Z","upstream":["CVE-2023-53441"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53441"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.52-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53441.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53441.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53441.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"}]}