cbcvebase.
CVE-2023-53441
published 2025-09-18

CVE-2023-53441: 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…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.14%
3.4th percentile
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: [] __cpu_map_entry_alloc+0xf7/0xb00 [] cpu_map_update_elem+0x2fe/0x3d0 [] bpf_map_update_value.isra.0+0x2bd/0x520 [] map_update_elem+0x4cb/0x720 [] __se_sys_bpf+0x8c3/0xb90 [] do_syscall_64+0x30/0x40 [] 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: [] __cpu_map_entry_alloc+0x260/0xb00 [] cpu_map_update_elem+0x2fe/0x3d0 [] bpf_map_update_value.isra.0+0x2bd/0x520 [] map_update_elem+0x4cb/0x720 [] __se_sys_bpf+0x8c3/0xb90 [] do_syscall_64+0x30/0x40 [] 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: [] kvmalloc_node+0x11e/0x170 [] __cpu_map_entry_alloc+0x2f0/0xb00 [] cpu_map_update_elem+0x2fe/0x3d0 [] bpf_map_update_value.isra.0+0x2bd/0x520 [] map_update_elem+0x4cb/0x720 [] __se_sys_bpf+0x8c3/0xb90 [] do_syscall_64+0x30/0x40 [] 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->kthread, since the KTHREAD_SHOULD_STOP bit of kthread has been set by kthread_stop, the threadfn of rcpu->kthread will never be executed, and rcpu->refcnt will ne

Affected

13 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.52-1 (bookworm)linux 6.1.52-1 (bookworm)
linuxlinux——
linuxlinux>= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < d26299f50f5ea8f0aeb5d49e659c31f64233c816d26299f50f5ea8f0aeb5d49e659c31f64233c816
linuxlinux>= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030
linuxlinux>= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < a957ac8e0b5ffb5797382a6adbafd005a5f72851a957ac8e0b5ffb5797382a6adbafd005a5f72851
linuxlinux>= 6710e1126934d8b4372b4d2f9ae1646cd3f151bf < 4369016497319a9635702da010d02af1ebb1849d4369016497319a9635702da010d02af1ebb1849d
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 6.1.52-16.1.52-1
linuxlinux_kernel>= 0 < 6.4.11-16.4.11-1
linuxlinux_kernel>= 0 < 6.4.11-16.4.11-1
linuxlinux_kernel>= 4.15 < 5.15.1215.15.121
linuxlinux_kernel>= 5.16 < 6.1.406.1.40
linuxlinux_kernel>= 6.2 < 6.4.56.4.5

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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