{"id":"DEBIAN-CVE-2023-53147","details":"In the Linux kernel, the following vulnerability has been resolved:  xfrm: add NULL check in xfrm_update_ae_params  Normally, x-\u003ereplay_esn and x-\u003epreplay_esn should be allocated at xfrm_alloc_replay_state_esn(...) in xfrm_state_construct(...), hence the xfrm_update_ae_params(...) is okay to update them. However, the current implementation of xfrm_new_ae(...) allows a malicious user to directly dereference a NULL pointer and crash the kernel like below.  BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 8253067 P4D 8253067 PUD 8e0e067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 98 Comm: poc.npd Not tainted 6.4.0-rc7-00072-gdad9774deaf1 #8 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.o4 RIP: 0010:memcpy_orig+0xad/0x140 Code: 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 RSP: 0018:ffff888008f57658 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff888008bd0000 RCX: ffffffff8238e571 RDX: 0000000000000018 RSI: ffff888007f64844 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888008f57818 R13: ffff888007f64aa4 R14: 0000000000000000 R15: 0000000000000000 FS:  00000000014013c0(0000) GS:ffff88806d600000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000054d8000 CR4: 00000000000006f0 Call Trace:  \u003cTASK\u003e  ? __die+0x1f/0x70  ? page_fault_oops+0x1e8/0x500  ? __pfx_is_prefetch.constprop.0+0x10/0x10  ? __pfx_page_fault_oops+0x10/0x10  ? _raw_spin_unlock_irqrestore+0x11/0x40  ? fixup_exception+0x36/0x460  ? _raw_spin_unlock_irqrestore+0x11/0x40  ? exc_page_fault+0x5e/0xc0  ? asm_exc_page_fault+0x26/0x30  ? xfrm_update_ae_params+0xd1/0x260  ? memcpy_orig+0xad/0x140  ? __pfx__raw_spin_lock_bh+0x10/0x10  xfrm_update_ae_params+0xe7/0x260  xfrm_new_ae+0x298/0x4e0  ? __pfx_xfrm_new_ae+0x10/0x10  ? __pfx_xfrm_new_ae+0x10/0x10  xfrm_user_rcv_msg+0x25a/0x410  ? __pfx_xfrm_user_rcv_msg+0x10/0x10  ? __alloc_skb+0xcf/0x210  ? stack_trace_save+0x90/0xd0  ? filter_irq_stacks+0x1c/0x70  ? __stack_depot_save+0x39/0x4e0  ? __kasan_slab_free+0x10a/0x190  ? kmem_cache_free+0x9c/0x340  ? netlink_recvmsg+0x23c/0x660  ? sock_recvmsg+0xeb/0xf0  ? __sys_recvfrom+0x13c/0x1f0  ? __x64_sys_recvfrom+0x71/0x90  ? do_syscall_64+0x3f/0x90  ? entry_SYSCALL_64_after_hwframe+0x72/0xdc  ? copyout+0x3e/0x50  netlink_rcv_skb+0xd6/0x210  ? __pfx_xfrm_user_rcv_msg+0x10/0x10  ? __pfx_netlink_rcv_skb+0x10/0x10  ? __pfx_sock_has_perm+0x10/0x10  ? mutex_lock+0x8d/0xe0  ? __pfx_mutex_lock+0x10/0x10  xfrm_netlink_rcv+0x44/0x50  netlink_unicast+0x36f/0x4c0  ? __pfx_netlink_unicast+0x10/0x10  ? netlink_recvmsg+0x500/0x660  netlink_sendmsg+0x3b7/0x700  This Null-ptr-deref bug is assigned CVE-2023-3772. And this commit adds additional NULL check in xfrm_update_ae_params to fix the NPD.","modified":"2026-09-15T09:02:50.265283899Z","published":"2025-09-15T14:15:37.133Z","upstream":["CVE-2023-53147"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53147"}],"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-2023-53147.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53147.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53147.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"}]}