578 lines
30 KiB
JSON
578 lines
30 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-23273",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-01-13T15:37:45.991Z",
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"datePublished": "2026-03-20T08:08:54.111Z",
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"dateUpdated": "2026-11-10T12:42:11.908Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:21:03.884Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: observe an RCU grace period in macvlan_common_newlink() error path\n\nvalis reported that a race condition still happens after my prior patch.\n\nmacvlan_common_newlink() might have made @dev visible before\ndetecting an error, and its caller will directly call free_netdev(dev).\n\nWe must respect an RCU period, either in macvlan or the core networking\nstack.\n\nAfter adding a temporary mdelay(1000) in macvlan_forward_source_one()\nto open the race window, valis repro was:\n\nip link add p1 type veth peer p2\nip link set address 00:00:00:00:00:20 dev p1\nip link set up dev p1\nip link set up dev p2\nip link add mv0 link p2 type macvlan mode source\n\n(ip link add invalid% link p2 type macvlan mode source macaddr add\n00:00:00:00:00:20 &) ; sleep 0.5 ; ping -c1 -I p1 1.2.3.4\nPING 1.2.3.4 (1.2.3.4): 56 data bytes\nRTNETLINK answers: Invalid argument\n\nBUG: KASAN: slab-use-after-free in macvlan_forward_source\n(drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\nRead of size 8 at addr ffff888016bb89c0 by task e/175\n\nCPU: 1 UID: 1000 PID: 175 Comm: e Not tainted 6.19.0-rc8+ #33 NONE\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014\nCall Trace:\n<IRQ>\ndump_stack_lvl (lib/dump_stack.c:123)\nprint_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\n? macvlan_forward_source (drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\nkasan_report (mm/kasan/report.c:597)\n? macvlan_forward_source (drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\nmacvlan_forward_source (drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\n? tasklet_init (kernel/softirq.c:983)\nmacvlan_handle_frame (drivers/net/macvlan.c:501)\n\nAllocated by task 169:\nkasan_save_stack (mm/kasan/common.c:58)\nkasan_save_track (./arch/x86/include/asm/current.h:25\nmm/kasan/common.c:70 mm/kasan/common.c:79)\n__kasan_kmalloc (mm/kasan/common.c:419)\n__kvmalloc_node_noprof (./include/linux/kasan.h:263 mm/slub.c:5657\nmm/slub.c:7140)\nalloc_netdev_mqs (net/core/dev.c:12012)\nrtnl_create_link (net/core/rtnetlink.c:3648)\nrtnl_newlink (net/core/rtnetlink.c:3830 net/core/rtnetlink.c:3957\nnet/core/rtnetlink.c:4072)\nrtnetlink_rcv_msg (net/core/rtnetlink.c:6958)\nnetlink_rcv_skb (net/netlink/af_netlink.c:2550)\nnetlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)\nnetlink_sendmsg (net/netlink/af_netlink.c:1894)\n__sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2206)\n__x64_sys_sendto (net/socket.c:2209)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)\n\nFreed by task 169:\nkasan_save_stack (mm/kasan/common.c:58)\nkasan_save_track (./arch/x86/include/asm/current.h:25\nmm/kasan/common.c:70 mm/kasan/common.c:79)\nkasan_save_free_info (mm/kasan/generic.c:587)\n__kasan_slab_free (mm/kasan/common.c:287)\nkfree (mm/slub.c:6674 mm/slub.c:6882)\nrtnl_newlink (net/core/rtnetlink.c:3845 net/core/rtnetlink.c:3957\nnet/core/rtnetlink.c:4072)\nrtnetlink_rcv_msg (net/core/rtnetlink.c:6958)\nnetlink_rcv_skb (net/netlink/af_netlink.c:2550)\nnetlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)\nnetlink_sendmsg (net/netlink/af_netlink.c:1894)\n__sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2206)\n__x64_sys_sendto (net/socket.c:2209)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerability is triggered via netlink RTM_NEWLINK message to create a macvlan device, requiring local system access through the netlink socket interface.\nAC:L - The attacker controls both sides of the race — one thread creates the macvlan with an invalid name to trigger the error path, while another sends packets to trigger the UAF read. The reproducer demonstrates reliable exploitation.\nPR:L - Requires CAP_NET_ADMIN which is obtainable by an unprivileged user through user namespaces (unshare -Urn), making this reachable without real root privileges.\nUI:N - No user interaction is needed; the attacker triggers both the macvlan creation and the packet sending themselves.\nS:U - Standard kernel use-after-free vulnerability; impact stays within the same security authority (kernel context).\nC:H - Use-after-free on a macvlan_dev/net_device structure allows reading freed and potentially reallocated memory, providing arbitrary kernel memory disclosure through controlled heap spraying.\nI:H - Use-after-free enables heap spraying to control the freed object contents, providing arbitrary write primitives and potential control flow hijacking for code execution.\nA:H - The use-after-free causes kernel crashes (KASAN slab-use-after-free as shown in the commit message), resulting in denial of service."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/macvlan.c"
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},
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{
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"version": "6.19.4",
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"lessThanOrEqual": "6.19.*",
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"status": "unaffected",
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},
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{
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"version": "7.0",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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"cpeApplicability": [
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"operator": "OR",
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"negate": false,
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},
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"url": "https://git.kernel.org/stable/c/3d94323c80d7fc4da5f10f9bb06a45d39d5d3cc4"
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},
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{
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"url": "https://git.kernel.org/stable/c/721eb342d9ba19bad5c4815ea3921465158b7362"
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},
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{
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"url": "https://git.kernel.org/stable/c/19c7d8ac51988d053709c1e85bd8482076af845d"
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},
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{
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"url": "https://git.kernel.org/stable/c/a1f686d273d129b45712d95f4095843b864466bd"
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{
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"url": "https://git.kernel.org/stable/c/d34f7a8aa9a25b7e64e0e46e444697c0f702374d"
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{
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"url": "https://git.kernel.org/stable/c/e3f000f0dee1bfab52e2e61ca6a3835d9e187e35"
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}
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],
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"title": "macvlan: observe an RCU grace period in macvlan_common_newlink() error path",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-11-10T12:42:11.908Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
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"versions": [
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{
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"status": "affected",
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"versions": [
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"status": "affected",
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"vendor": "Siemens",
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"status": "affected",
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.6",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
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"versions": [
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{
|
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"status": "affected",
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"version": "V3.1.5",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
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"versions": [
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{
|
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"status": "affected",
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"version": "V3.1.7",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
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"versions": [
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{
|
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"status": "affected",
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"version": "V3.1.6",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.5",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.7",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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|
"versions": [
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{
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|
"status": "affected",
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"version": "0",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
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"versions": [
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{
|
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"status": "affected",
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"version": "V3.1.6",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.5",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
|
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"vendor": "Siemens",
|
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"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
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"versions": [
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{
|
|
"status": "affected",
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"version": "V3.1.7",
|
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"lessThan": "*",
|
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"versionType": "custom"
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}
|
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],
|
|
"defaultStatus": "unknown"
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-23273",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:07:13.078861Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-362",
|
|
"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T18:35:41.003Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |