{"id":"CVE-2023-53147","state":"PUBLISHED","title":"xfrm: add NULL check in xfrm_update_ae_params","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: add NULL check in xfrm_update_ae_params\n\nNormally, x->replay_esn and x->preplay_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 <TASK>\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.","publishedAt":"2025-09-15T14:03:08.937Z","updatedAt":"2026-05-11T19:39:21.360Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"ed1cba039309c80b49719fcff3e3d7cdddb73d96","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"44f69c96f8a147413c23c68cda4d6fb5e23137cd","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"8046beb890ebc83c5820188c650073e1c6066e67","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"bd30aa9c7febb6e709670cd5154194189ca3b7b5","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"075448a2eb753f813fe873cfa52853e9fef8eedb","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"87b655f4936b6fc01f3658aa88a22c923b379ebd","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"53df4be4f5221e90dc7aa9ce745a9a21bb7024f4","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"00374d9b6d9f932802b55181be9831aa948e5b7c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_user.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.39","versionType":"semver"},{"version":"4.14.324","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.293","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.255","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.192","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.128","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.47","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.12","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_user.c"]}],"references":["https://git.kernel.org/stable/c/ed1cba039309c80b49719fcff3e3d7cdddb73d96","https://git.kernel.org/stable/c/44f69c96f8a147413c23c68cda4d6fb5e23137cd","https://git.kernel.org/stable/c/8046beb890ebc83c5820188c650073e1c6066e67","https://git.kernel.org/stable/c/bd30aa9c7febb6e709670cd5154194189ca3b7b5","https://git.kernel.org/stable/c/075448a2eb753f813fe873cfa52853e9fef8eedb","https://git.kernel.org/stable/c/87b655f4936b6fc01f3658aa88a22c923b379ebd","https://git.kernel.org/stable/c/53df4be4f5221e90dc7aa9ce745a9a21bb7024f4","https://git.kernel.org/stable/c/00374d9b6d9f932802b55181be9831aa948e5b7c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53147.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53147","state":"PUBLISHED","datePublished":"2025-09-15T14:03:08.937Z","dateUpdated":"2026-05-11T19:39:21.360Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-05-02T15:51:43.565Z"},"containers":{"cna":{"title":"xfrm: add NULL check in xfrm_update_ae_params","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: add NULL check in xfrm_update_ae_params\n\nNormally, x->replay_esn and x->preplay_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 <TASK>\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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"ed1cba039309c80b49719fcff3e3d7cdddb73d96","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"44f69c96f8a147413c23c68cda4d6fb5e23137cd","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"8046beb890ebc83c5820188c650073e1c6066e67","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"bd30aa9c7febb6e709670cd5154194189ca3b7b5","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"075448a2eb753f813fe873cfa52853e9fef8eedb","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"87b655f4936b6fc01f3658aa88a22c923b379ebd","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"53df4be4f5221e90dc7aa9ce745a9a21bb7024f4","versionType":"git"},{"version":"d8647b79c3b7e223ac051439d165bc8e7bbb832f","status":"affected","lessThan":"00374d9b6d9f932802b55181be9831aa948e5b7c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_user.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.39","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.39","versionType":"semver"},{"version":"4.14.324","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.293","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.255","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.192","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.128","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.47","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.4.12","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_user.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ed1cba039309c80b49719fcff3e3d7cdddb73d96"},{"url":"https://git.kernel.org/stable/c/44f69c96f8a147413c23c68cda4d6fb5e23137cd"},{"url":"https://git.kernel.org/stable/c/8046beb890ebc83c5820188c650073e1c6066e67"},{"url":"https://git.kernel.org/stable/c/bd30aa9c7febb6e709670cd5154194189ca3b7b5"},{"url":"https://git.kernel.org/stable/c/075448a2eb753f813fe873cfa52853e9fef8eedb"},{"url":"https://git.kernel.org/stable/c/87b655f4936b6fc01f3658aa88a22c923b379ebd"},{"url":"https://git.kernel.org/stable/c/53df4be4f5221e90dc7aa9ce745a9a21bb7024f4"},{"url":"https://git.kernel.org/stable/c/00374d9b6d9f932802b55181be9831aa948e5b7c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:39:21.360Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"4.14.324"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"4.19.293"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"5.4.255"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"5.10.192"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"5.15.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.1.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.4.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}