{"id":"CVE-2023-53147","summary":"xfrm: add NULL check in xfrm_update_ae_params","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: add NULL check in xfrm_update_ae_params\n\nNormally, x-\u003ereplay_esn and x-\u003epreplay_esn should be allocated at\nxfrm_alloc_replay_state_esn(...) in xfrm_state_construct(...), hence the\nxfrm_update_ae_params(...) is okay to update them. However, the current\nimplementation of xfrm_new_ae(...) allows a malicious user to directly\ndereference a NULL pointer and crash the kernel like below.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\nPGD 8253067 P4D 8253067 PUD 8e0e067 PMD 0\nOops: 0002 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 0 PID: 98 Comm: poc.npd Not tainted 6.4.0-rc7-00072-gdad9774deaf1 #8\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.o4\nRIP: 0010:memcpy_orig+0xad/0x140\nCode: e8 4c 89 5f e0 48 8d 7f e0 73 d2 83 c2 20 48 29 d6 48 29 d7 83 fa 10 72 34 4c 8b 06 4c 8b 4e 08 c\nRSP: 0018:ffff888008f57658 EFLAGS: 00000202\nRAX: 0000000000000000 RBX: ffff888008bd0000 RCX: ffffffff8238e571\nRDX: 0000000000000018 RSI: ffff888007f64844 RDI: 0000000000000000\nRBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000000 R12: ffff888008f57818\nR13: ffff888007f64aa4 R14: 0000000000000000 R15: 0000000000000000\nFS:  00000000014013c0(0000) GS:ffff88806d600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000000 CR3: 00000000054d8000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n ? __die+0x1f/0x70\n ? page_fault_oops+0x1e8/0x500\n ? __pfx_is_prefetch.constprop.0+0x10/0x10\n ? __pfx_page_fault_oops+0x10/0x10\n ? _raw_spin_unlock_irqrestore+0x11/0x40\n ? fixup_exception+0x36/0x460\n ? _raw_spin_unlock_irqrestore+0x11/0x40\n ? exc_page_fault+0x5e/0xc0\n ? asm_exc_page_fault+0x26/0x30\n ? xfrm_update_ae_params+0xd1/0x260\n ? memcpy_orig+0xad/0x140\n ? __pfx__raw_spin_lock_bh+0x10/0x10\n xfrm_update_ae_params+0xe7/0x260\n xfrm_new_ae+0x298/0x4e0\n ? __pfx_xfrm_new_ae+0x10/0x10\n ? __pfx_xfrm_new_ae+0x10/0x10\n xfrm_user_rcv_msg+0x25a/0x410\n ? __pfx_xfrm_user_rcv_msg+0x10/0x10\n ? __alloc_skb+0xcf/0x210\n ? stack_trace_save+0x90/0xd0\n ? filter_irq_stacks+0x1c/0x70\n ? __stack_depot_save+0x39/0x4e0\n ? __kasan_slab_free+0x10a/0x190\n ? kmem_cache_free+0x9c/0x340\n ? netlink_recvmsg+0x23c/0x660\n ? sock_recvmsg+0xeb/0xf0\n ? __sys_recvfrom+0x13c/0x1f0\n ? __x64_sys_recvfrom+0x71/0x90\n ? do_syscall_64+0x3f/0x90\n ? entry_SYSCALL_64_after_hwframe+0x72/0xdc\n ? copyout+0x3e/0x50\n netlink_rcv_skb+0xd6/0x210\n ? __pfx_xfrm_user_rcv_msg+0x10/0x10\n ? __pfx_netlink_rcv_skb+0x10/0x10\n ? __pfx_sock_has_perm+0x10/0x10\n ? mutex_lock+0x8d/0xe0\n ? __pfx_mutex_lock+0x10/0x10\n xfrm_netlink_rcv+0x44/0x50\n netlink_unicast+0x36f/0x4c0\n ? __pfx_netlink_unicast+0x10/0x10\n ? netlink_recvmsg+0x500/0x660\n netlink_sendmsg+0x3b7/0x700\n\nThis Null-ptr-deref bug is assigned CVE-2023-3772. And this commit\nadds additional NULL check in xfrm_update_ae_params to fix the NPD.","modified":"2026-05-28T03:54:11.420977107Z","published":"2025-09-15T14:03:08.937Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03613-1","SUSE-SU-2025:03614-1","SUSE-SU-2025:03615-1","SUSE-SU-2025:03626-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3751-1","SUSE-SU-2025:3761-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4141-1","SUSE-SU-2025:4315-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53147.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/00374d9b6d9f932802b55181be9831aa948e5b7c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/075448a2eb753f813fe873cfa52853e9fef8eedb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44f69c96f8a147413c23c68cda4d6fb5e23137cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/53df4be4f5221e90dc7aa9ce745a9a21bb7024f4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8046beb890ebc83c5820188c650073e1c6066e67"},{"type":"WEB","url":"https://git.kernel.org/stable/c/87b655f4936b6fc01f3658aa88a22c923b379ebd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd30aa9c7febb6e709670cd5154194189ca3b7b5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed1cba039309c80b49719fcff3e3d7cdddb73d96"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53147.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53147"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d8647b79c3b7e223ac051439d165bc8e7bbb832f"},{"fixed":"ed1cba039309c80b49719fcff3e3d7cdddb73d96"},{"fixed":"44f69c96f8a147413c23c68cda4d6fb5e23137cd"},{"fixed":"8046beb890ebc83c5820188c650073e1c6066e67"},{"fixed":"bd30aa9c7febb6e709670cd5154194189ca3b7b5"},{"fixed":"075448a2eb753f813fe873cfa52853e9fef8eedb"},{"fixed":"87b655f4936b6fc01f3658aa88a22c923b379ebd"},{"fixed":"53df4be4f5221e90dc7aa9ce745a9a21bb7024f4"},{"fixed":"00374d9b6d9f932802b55181be9831aa948e5b7c"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53147.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.39"},{"fixed":"4.14.324"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.293"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.255"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.192"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.4.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53147.json"}}],"schema_version":"1.7.5"}