{"cve":"CVE-2023-52637","nvd":{"published":"2024-04-03T15:15:51.347","modified":"2026-08-04T10:18:36.063","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER)\n\nLock jsk->sk to prevent UAF when setsockopt(..., SO_J1939_FILTER, ...)\nmodifies jsk->filters while receiving packets.\n\nFollowing trace was seen on affected system:\n ==================================================================\n BUG: KASAN: slab-use-after-free in j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]\n Read of size 4 at addr ffff888012144014 by task j1939/350\n\n CPU: 0 PID: 350 Comm: j1939 Tainted: G        W  OE      6.5.0-rc5 #1\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\n Call Trace:\n  print_report+0xd3/0x620\n  ? kasan_complete_mode_report_info+0x7d/0x200\n  ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]\n  kasan_report+0xc2/0x100\n  ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]\n  __asan_load4+0x84/0xb0\n  j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939]\n  j1939_sk_recv+0x20b/0x320 [can_j1939]\n  ? __kasan_check_write+0x18/0x20\n  ? __pfx_j1939_sk_recv+0x10/0x10 [can_j1939]\n  ? j1939_simple_recv+0x69/0x280 [can_j1939]\n  ? j1939_ac_recv+0x5e/0x310 [can_j1939]\n  j1939_can_recv+0x43f/0x580 [can_j1939]\n  ? __pfx_j1939_can_recv+0x10/0x10 [can_j1939]\n  ? raw_rcv+0x42/0x3c0 [can_raw]\n  ? __pfx_j1939_can_recv+0x10/0x10 [can_j1939]\n  can_rcv_filter+0x11f/0x350 [can]\n  can_receive+0x12f/0x190 [can]\n  ? __pfx_can_rcv+0x10/0x10 [can]\n  can_rcv+0xdd/0x130 [can]\n  ? __pfx_can_rcv+0x10/0x10 [can]\n  __netif_receive_skb_one_core+0x13d/0x150\n  ? __pfx___netif_receive_skb_one_core+0x10/0x10\n  ? __kasan_check_write+0x18/0x20\n  ? _raw_spin_lock_irq+0x8c/0xe0\n  __netif_receive_skb+0x23/0xb0\n  process_backlog+0x107/0x260\n  __napi_poll+0x69/0x310\n  net_rx_action+0x2a1/0x580\n  ? __pfx_net_rx_action+0x10/0x10\n  ? __pfx__raw_spin_lock+0x10/0x10\n  ? handle_irq_event+0x7d/0xa0\n  __do_softirq+0xf3/0x3f8\n  do_softirq+0x53/0x80\n  </IRQ>\n  <TASK>\n  __local_bh_enable_ip+0x6e/0x70\n  netif_rx+0x16b/0x180\n  can_send+0x32b/0x520 [can]\n  ? __pfx_can_send+0x10/0x10 [can]\n  ? __check_object_size+0x299/0x410\n  raw_sendmsg+0x572/0x6d0 [can_raw]\n  ? __pfx_raw_sendmsg+0x10/0x10 [can_raw]\n  ? apparmor_socket_sendmsg+0x2f/0x40\n  ? __pfx_raw_sendmsg+0x10/0x10 [can_raw]\n  sock_sendmsg+0xef/0x100\n  sock_write_iter+0x162/0x220\n  ? __pfx_sock_write_iter+0x10/0x10\n  ? __rtnl_unlock+0x47/0x80\n  ? security_file_permission+0x54/0x320\n  vfs_write+0x6ba/0x750\n  ? __pfx_vfs_write+0x10/0x10\n  ? __fget_light+0x1ca/0x1f0\n  ? __rcu_read_unlock+0x5b/0x280\n  ksys_write+0x143/0x170\n  ? __pfx_ksys_write+0x10/0x10\n  ? __kasan_check_read+0x15/0x20\n  ? fpregs_assert_state_consistent+0x62/0x70\n  __x64_sys_write+0x47/0x60\n  do_syscall_64+0x60/0x90\n  ? do_syscall_64+0x6d/0x90\n  ? irqentry_exit+0x3f/0x50\n  ? exc_page_fault+0x79/0xf0\n  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n Allocated by task 348:\n  kasan_save_stack+0x2a/0x50\n  kasan_set_track+0x29/0x40\n  kasan_save_alloc_info+0x1f/0x30\n  __kasan_kmalloc+0xb5/0xc0\n  __kmalloc_node_track_caller+0x67/0x160\n  j1939_sk_setsockopt+0x284/0x450 [can_j1939]\n  __sys_setsockopt+0x15c/0x2f0\n  __x64_sys_setsockopt+0x6b/0x80\n  do_syscall_64+0x60/0x90\n  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n Freed by task 349:\n  kasan_save_stack+0x2a/0x50\n  kasan_set_track+0x29/0x40\n  kasan_save_free_info+0x2f/0x50\n  __kasan_slab_free+0x12e/0x1c0\n  __kmem_cache_free+0x1b9/0x380\n  kfree+0x7a/0x120\n  j1939_sk_setsockopt+0x3b2/0x450 [can_j1939]\n  __sys_setsockopt+0x15c/0x2f0\n  __x64_sys_setsockopt+0x6b/0x80\n  do_syscall_64+0x60/0x90\n  entry_SYSCALL_64_after_hwframe+0x6e/0xd8","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/08de58abedf6e69396e1207e4f99ef8904b2b532","https://git.kernel.org/stable/c/41ccb5bcbf03f02d820bc6ea8390811859f558f8","https://git.kernel.org/stable/c/4dd684d4bb3cd5454e0bf6e2a1bdfbd5c9c872ed","https://git.kernel.org/stable/c/978e50ef8c38dc71bd14d1b0143d554ff5d188ba","https://git.kernel.org/stable/c/efe7cf828039aedb297c1f9920b638fffee6aabc"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:47:51.568503435+00:00"},"epss":{"cve":"CVE-2023-52637","score":0.00233,"percentile":0.14236,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}