CVE-2023-52637 (GCVE-0-2023-52637)

Vulnerability from cvelistv5 – Published: 2024-04-03 14:54 – Updated: 2026-08-05 09:10
VLAI
Title
can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER)
Summary
In the Linux kernel, the following vulnerability has been resolved: can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER) Lock jsk->sk to prevent UAF when setsockopt(..., SO_J1939_FILTER, ...) modifies jsk->filters while receiving packets. Following trace was seen on affected system: ================================================================== BUG: KASAN: slab-use-after-free in j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] Read of size 4 at addr ffff888012144014 by task j1939/350 CPU: 0 PID: 350 Comm: j1939 Tainted: G W OE 6.5.0-rc5 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: print_report+0xd3/0x620 ? kasan_complete_mode_report_info+0x7d/0x200 ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] kasan_report+0xc2/0x100 ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] __asan_load4+0x84/0xb0 j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] j1939_sk_recv+0x20b/0x320 [can_j1939] ? __kasan_check_write+0x18/0x20 ? __pfx_j1939_sk_recv+0x10/0x10 [can_j1939] ? j1939_simple_recv+0x69/0x280 [can_j1939] ? j1939_ac_recv+0x5e/0x310 [can_j1939] j1939_can_recv+0x43f/0x580 [can_j1939] ? __pfx_j1939_can_recv+0x10/0x10 [can_j1939] ? raw_rcv+0x42/0x3c0 [can_raw] ? __pfx_j1939_can_recv+0x10/0x10 [can_j1939] can_rcv_filter+0x11f/0x350 [can] can_receive+0x12f/0x190 [can] ? __pfx_can_rcv+0x10/0x10 [can] can_rcv+0xdd/0x130 [can] ? __pfx_can_rcv+0x10/0x10 [can] __netif_receive_skb_one_core+0x13d/0x150 ? __pfx___netif_receive_skb_one_core+0x10/0x10 ? __kasan_check_write+0x18/0x20 ? _raw_spin_lock_irq+0x8c/0xe0 __netif_receive_skb+0x23/0xb0 process_backlog+0x107/0x260 __napi_poll+0x69/0x310 net_rx_action+0x2a1/0x580 ? __pfx_net_rx_action+0x10/0x10 ? __pfx__raw_spin_lock+0x10/0x10 ? handle_irq_event+0x7d/0xa0 __do_softirq+0xf3/0x3f8 do_softirq+0x53/0x80 </IRQ> <TASK> __local_bh_enable_ip+0x6e/0x70 netif_rx+0x16b/0x180 can_send+0x32b/0x520 [can] ? __pfx_can_send+0x10/0x10 [can] ? __check_object_size+0x299/0x410 raw_sendmsg+0x572/0x6d0 [can_raw] ? __pfx_raw_sendmsg+0x10/0x10 [can_raw] ? apparmor_socket_sendmsg+0x2f/0x40 ? __pfx_raw_sendmsg+0x10/0x10 [can_raw] sock_sendmsg+0xef/0x100 sock_write_iter+0x162/0x220 ? __pfx_sock_write_iter+0x10/0x10 ? __rtnl_unlock+0x47/0x80 ? security_file_permission+0x54/0x320 vfs_write+0x6ba/0x750 ? __pfx_vfs_write+0x10/0x10 ? __fget_light+0x1ca/0x1f0 ? __rcu_read_unlock+0x5b/0x280 ksys_write+0x143/0x170 ? __pfx_ksys_write+0x10/0x10 ? __kasan_check_read+0x15/0x20 ? fpregs_assert_state_consistent+0x62/0x70 __x64_sys_write+0x47/0x60 do_syscall_64+0x60/0x90 ? do_syscall_64+0x6d/0x90 ? irqentry_exit+0x3f/0x50 ? exc_page_fault+0x79/0xf0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Allocated by task 348: kasan_save_stack+0x2a/0x50 kasan_set_track+0x29/0x40 kasan_save_alloc_info+0x1f/0x30 __kasan_kmalloc+0xb5/0xc0 __kmalloc_node_track_caller+0x67/0x160 j1939_sk_setsockopt+0x284/0x450 [can_j1939] __sys_setsockopt+0x15c/0x2f0 __x64_sys_setsockopt+0x6b/0x80 do_syscall_64+0x60/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Freed by task 349: kasan_save_stack+0x2a/0x50 kasan_set_track+0x29/0x40 kasan_save_free_info+0x2f/0x50 __kasan_slab_free+0x12e/0x1c0 __kmem_cache_free+0x1b9/0x380 kfree+0x7a/0x120 j1939_sk_setsockopt+0x3b2/0x450 [can_j1939] __sys_setsockopt+0x15c/0x2f0 __x64_sys_setsockopt+0x6b/0x80 do_syscall_64+0x60/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-03 17:45 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6996 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 08de58abedf6e69396e1207e4f99ef8904b2b532 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 978e50ef8c38dc71bd14d1b0143d554ff5d188ba (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 41ccb5bcbf03f02d820bc6ea8390811859f558f8 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 4dd684d4bb3cd5454e0bf6e2a1bdfbd5c9c872ed (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < f84e7534457dcd7835be743517c35378bb4e7c50 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < fc74b9cb789cae061bbca7b203a3842e059f6b5d (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < efe7cf828039aedb297c1f9920b638fffee6aabc (git)
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Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.4.269 , ≤ 5.4.* (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.79 , ≤ 6.1.* (semver)
Unaffected: 6.6.18 , ≤ 6.6.* (semver)
Unaffected: 6.7.6 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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      "descriptions": [
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          "lang": "en",
          "value": "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-\u003esk to prevent UAF when setsockopt(..., SO_J1939_FILTER, ...)\nmodifies jsk-\u003efilters 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  \u003c/IRQ\u003e\n  \u003cTASK\u003e\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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF free of jsk-\u003efilters occurs only in local setsockopt(SO_J1939_FILTER) (or socket close); a remote CAN/J1939 peer can drive receive-side matching but cannot free the filter array, so the attack requires local syscall access.\nAC:L - The attacker fully controls both sides of the race\u2014concurrent SO_J1939_FILTER setsockopt threads to free/replace filters, plus AF_CAN raw sendmsg loopback (or bus traffic) to hit j1939_sk_match_filter in softirq\u2014so success does not depend on external conditions.\nPR:L - can_create()/j1939_sk_bind()/SO_J1939_FILTER impose no capability checks; on systems with an UP CAN/vcan device any unprivileged user can bind, and CAP_NET_ADMIN to create vcan is obtainable via unshare -Urn without real init-namespace root.\nUI:N - The attacker opens J1939/raw sockets, sets filters, and injects frames themselves; no separate victim action is required.\nS:U - Impact is a kernel slab use-after-free within the same host kernel authority (local privilege escalation), with no VM, IOMMU, or sandbox boundary crossed.\nC:H - This is a slab UAF of the attacker-sized j1939_filter array (up to 512 entries); reclaiming the freed object enables reading reclaimed kernel heap contents and arbitrary-read primitives.\nI:H - The same UAF is exploitable via heap spray of the freed filter allocation to obtain arbitrary write / control-flow hijacking primitives in the kernel.\nA:H - Triggering the race reliably produces slab-use-after-free reads in softirq (as shown by the KASAN report in j1939_sk_recv_match_one), causing kernel oops/panic even when not fully exploited."
            }
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        {
          "url": "https://git.kernel.org/stable/c/efe7cf828039aedb297c1f9920b638fffee6aabc"
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      "title": "can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER)",
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    "dateReserved": "2024-03-06T09:52:12.093Z",
    "dateUpdated": "2026-08-05T09:10:50.061Z",
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        "descriptions": [
          {
            "lang": "en",
            "value": "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-\u003esk to prevent UAF when setsockopt(..., SO_J1939_FILTER, ...)\nmodifies jsk-\u003efilters 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  \u003c/IRQ\u003e\n  \u003cTASK\u003e\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"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: j1939: Reparar UAF en j1939_sk_match_filter durante setsockopt(SO_J1939_FILTER) Bloquear jsk-\u0026gt;sk para evitar UAF cuando setsockopt(..., SO_J1939_FILTER, ...) modifica jsk-\u0026gt; filtros mientras recibe paquetes. Se vio el siguiente rastro en el sistema afectado: ============================================ ======================== ERROR: KASAN: slab-use-after-free en j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] Lectura de tama\u00f1o 4 en direcci\u00f3n ffff888012144014 por tarea j1939/350 CPU: 0 PID: 350 Comm: j1939 Contaminado: GW OE 6.5.0-rc5 #1 Nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/ 01/2014 Seguimiento de llamadas: print_report+0xd3/0x620 ? kasan_complete_mode_report_info+0x7d/0x200 ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] kasan_report+0xc2/0x100 ? j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] __asan_load4+0x84/0xb0 j1939_sk_recv_match_one+0x1af/0x2d0 [can_j1939] j1939_sk_recv+0x20b/0x320 [can_j1939] ? __kasan_check_write+0x18/0x20? __pfx_j1939_sk_recv+0x10/0x10 [can_j1939] ? j1939_simple_recv+0x69/0x280 [can_j1939] ? j1939_ac_recv+0x5e/0x310 [can_j1939] j1939_can_recv+0x43f/0x580 [can_j1939] ? __pfx_j1939_can_recv+0x10/0x10 [can_j1939] ? raw_rcv+0x42/0x3c0 [puede_raw]? __pfx_j1939_can_recv+0x10/0x10 [can_j1939] can_rcv_filter+0x11f/0x350 [puede] can_receive+0x12f/0x190 [puede]? __pfx_can_rcv+0x10/0x10 [puede] can_rcv+0xdd/0x130 [puede] ? __pfx_can_rcv+0x10/0x10 [puede] __netif_receive_skb_one_core+0x13d/0x150 ? __pfx___netif_receive_skb_one_core+0x10/0x10 ? __kasan_check_write+0x18/0x20? _raw_spin_lock_irq+0x8c/0xe0 __netif_receive_skb+0x23/0xb0 Process_backlog+0x107/0x260 __napi_poll+0x69/0x310 net_rx_action+0x2a1/0x580 ? __pfx_net_rx_action+0x10/0x10 ? __pfx__raw_spin_lock+0x10/0x10? handle_irq_event+0x7d/0xa0 __do_softirq+0xf3/0x3f8 do_softirq+0x53/0x80   __local_bh_enable_ip+0x6e/0x70 netif_rx+0x16b/0x180 can_send+0x32b/0x520 [can] ? __pfx_can_send+0x10/0x10 [puede]? __check_object_size+0x299/0x410 raw_sendmsg+0x572/0x6d0 [can_raw]? __pfx_raw_sendmsg+0x10/0x10 [can_raw]? apparmor_socket_sendmsg+0x2f/0x40? __pfx_raw_sendmsg+0x10/0x10 [can_raw] sock_sendmsg+0xef/0x100 sock_write_iter+0x162/0x220 ? __pfx_sock_write_iter+0x10/0x10? __rtnl_unlock+0x47/0x80? permiso_archivo_seguridad+0x54/0x320 vfs_write+0x6ba/0x750 ? __pfx_vfs_write+0x10/0x10? __fget_light+0x1ca/0x1f0 ? __rcu_read_unlock+0x5b/0x280 ksys_write+0x143/0x170 ? __pfx_ksys_write+0x10/0x10? __kasan_check_read+0x15/0x20 ? fpregs_assert_state_consistent+0x62/0x70 __x64_sys_write+0x47/0x60 do_syscall_64+0x60/0x90 ? do_syscall_64+0x6d/0x90? irqentry_exit+0x3f/0x50? exc_page_fault+0x79/0xf0 Entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Asignado por la tarea 348: kasan_save_stack+0x2a/0x50 kasan_set_track+0x29/0x40 kasan_save_alloc_info+0x1f/0x30 __kasan_kmalloc+0xb5/0xc0 __kmalloc_node_track_caller+0x67/0x160 j1939_sk_setsockopt+0x284/0x450 [can_j1939] __sys_setsockopt+ 0x15c/0x2f0 __x64_sys_setsockopt+0x6b/0x80 do_syscall_64+0x60/0x90 Entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Liberado por la tarea 349: kasan_save_stack+0x2a/0x50 kasan_set_track+0x29/0x40 ka san_save_free_info+0x2f/0x50 __kasan_slab_free+0x12e/0x1c0 __kmem_cache_free+0x1b9/0x380 kfree+ 0x7a/0x120 j1939_sk_setsockopt+0x3b2/0x450 [can_j1939] __sys_setsockopt+0x15c/0x2f0 __x64_sys_setsockopt+0x6b/0x80 do_syscall_64+0x60/0x90 Entry_SYSCALL_64_after_h wframe+0x6e/0xd8"
          }
        ],
        "id": "CVE-2023-52637",
        "lastModified": "2026-08-04T10:18:36.063",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "exploitabilityScore": 1.8,
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              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2023-52637",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-03T17:45:26.968713Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-04-03T15:15:51.347",
        "references": [
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    "redhat_vex": {
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      "current_release_date": "2026-08-04T22:57:14+00:00",
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      "product_status:fixed": "280",
      "product_status:known_affected": "22",
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              "vendor": "Linux",
              "versions": [
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                  "version": "0",
                  "versionType": "semver"
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                  "status": "unaffected",
                  "version": "5.4.269",
                  "versionType": "semver"
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                  "status": "unaffected",
                  "version": "5.10.210",
                  "versionType": "semver"
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                  "status": "unaffected",
                  "version": "5.15.149",
                  "versionType": "semver"
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                  "version": "6.1.79",
                  "versionType": "semver"
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                  "version": "6.6.18",
                  "versionType": "semver"
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                  "status": "unaffected",
                  "version": "6.7.6",
                  "versionType": "semver"
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                  "versionType": "original_commit_for_fix"
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          "cpeApplicability": [
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              "nodes": [
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                  "cpeMatch": [
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                      "versionEndExcluding": "5.4.269",
                      "versionStartIncluding": "5.4",
                      "vulnerable": true
                    },
                    {
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                      "versionEndExcluding": "5.10.210",
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                      "versionEndExcluding": "6.6.18",
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                  "negate": false,
                  "operator": "OR"
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              ]
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          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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-\u003esk to prevent UAF when setsockopt(..., SO_J1939_FILTER, ...)\nmodifies jsk-\u003efilters 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  \u003c/IRQ\u003e\n  \u003cTASK\u003e\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"
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The UAF free of jsk-\u003efilters occurs only in local setsockopt(SO_J1939_FILTER) (or socket close); a remote CAN/J1939 peer can drive receive-side matching but cannot free the filter array, so the attack requires local syscall access.\nAC:L - The attacker fully controls both sides of the race\u2014concurrent SO_J1939_FILTER setsockopt threads to free/replace filters, plus AF_CAN raw sendmsg loopback (or bus traffic) to hit j1939_sk_match_filter in softirq\u2014so success does not depend on external conditions.\nPR:L - can_create()/j1939_sk_bind()/SO_J1939_FILTER impose no capability checks; on systems with an UP CAN/vcan device any unprivileged user can bind, and CAP_NET_ADMIN to create vcan is obtainable via unshare -Urn without real init-namespace root.\nUI:N - The attacker opens J1939/raw sockets, sets filters, and injects frames themselves; no separate victim action is required.\nS:U - Impact is a kernel slab use-after-free within the same host kernel authority (local privilege escalation), with no VM, IOMMU, or sandbox boundary crossed.\nC:H - This is a slab UAF of the attacker-sized j1939_filter array (up to 512 entries); reclaiming the freed object enables reading reclaimed kernel heap contents and arbitrary-read primitives.\nI:H - The same UAF is exploitable via heap spray of the freed filter allocation to obtain arbitrary write / control-flow hijacking primitives in the kernel.\nA:H - Triggering the race reliably produces slab-use-after-free reads in softirq (as shown by the KASAN report in j1939_sk_recv_match_one), causing kernel oops/panic even when not fully exploited."
                }
              ]
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          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:10:50.061Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
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          "references": [
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              "url": "https://git.kernel.org/stable/c/08de58abedf6e69396e1207e4f99ef8904b2b532"
            },
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            },
            {
              "url": "https://git.kernel.org/stable/c/efe7cf828039aedb297c1f9920b638fffee6aabc"
            }
          ],
          "title": "can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER)",
          "x_generator": {
            "engine": "bippy-1.2.0"
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      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52637",
        "datePublished": "2024-04-03T14:54:40.262Z",
        "dateReserved": "2024-03-06T09:52:12.093Z",
        "dateUpdated": "2026-08-05T09:10:50.061Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.