CVE-2026-23458 (GCVE-0-2026-23458)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-07-14 12:47
VLAI
Title
netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct() ctnetlink_dump_exp_ct() stores a conntrack pointer in cb->data for the netlink dump callback ctnetlink_exp_ct_dump_table(), but drops the conntrack reference immediately after netlink_dump_start(). When the dump spans multiple rounds, the second recvmsg() triggers the dump callback which dereferences the now-freed conntrack via nfct_help(ct), leading to a use-after-free on ct->ext. The bug is that the netlink_dump_control has no .start or .done callbacks to manage the conntrack reference across dump rounds. Other dump functions in the same file (e.g. ctnetlink_get_conntrack) properly use .start/.done callbacks for this purpose. Fix this by adding .start and .done callbacks that hold and release the conntrack reference for the duration of the dump, and move the nfct_help() call after the cb->args[0] early-return check in the dump callback to avoid dereferencing ct->ext unnecessarily. BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0 Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133 CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY Call Trace: <TASK> ctnetlink_exp_ct_dump_table+0x4f/0x2e0 netlink_dump+0x333/0x880 netlink_recvmsg+0x3e2/0x4b0 ? aa_sk_perm+0x184/0x450 sock_recvmsg+0xde/0xf0 Allocated by task 133: kmem_cache_alloc_noprof+0x134/0x440 __nf_conntrack_alloc+0xa8/0x2b0 ctnetlink_create_conntrack+0xa1/0x900 ctnetlink_new_conntrack+0x3cf/0x7d0 nfnetlink_rcv_msg+0x48e/0x510 netlink_rcv_skb+0xc9/0x1f0 nfnetlink_rcv+0xdb/0x220 netlink_unicast+0x3ec/0x590 netlink_sendmsg+0x397/0x690 __sys_sendmsg+0xf4/0x180 Freed by task 0: slab_free_after_rcu_debug+0xad/0x1e0 rcu_core+0x5c3/0x9c0
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < d8cd0efbccc5cfb0a80da744a7da76e1333ab925 (git)
Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < 9821b47f669eb82791fa0b1a6ebaf9aa219bea72 (git)
Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < bdf2724eefd4455a66863abb025bab8d3aa98c57 (git)
Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < f04cc86d59906513d2d62183b882966fc0ae0390 (git)
Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < f025171feef2ac65663d7986f1d5ff0c28d6b2a9 (git)
Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < 04c8907ce4e3d3e26c5e1a3e47aa5d17082cbb56 (git)
Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < cd541f15b60e2257441398cf495d978f816d09f8 (git)
Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < 5cb81eeda909dbb2def209dd10636b51549a3f8a (git)
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Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()\n\nctnetlink_dump_exp_ct() stores a conntrack pointer in cb-\u003edata for the\nnetlink dump callback ctnetlink_exp_ct_dump_table(), but drops the\nconntrack reference immediately after netlink_dump_start().  When the\ndump spans multiple rounds, the second recvmsg() triggers the dump\ncallback which dereferences the now-freed conntrack via nfct_help(ct),\nleading to a use-after-free on ct-\u003eext.\n\nThe bug is that the netlink_dump_control has no .start or .done\ncallbacks to manage the conntrack reference across dump rounds.  Other\ndump functions in the same file (e.g. ctnetlink_get_conntrack) properly\nuse .start/.done callbacks for this purpose.\n\nFix this by adding .start and .done callbacks that hold and release the\nconntrack reference for the duration of the dump, and move the\nnfct_help() call after the cb-\u003eargs[0] early-return check in the dump\ncallback to avoid dereferencing ct-\u003eext unnecessarily.\n\n BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133\n\n CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY\n Call Trace:\n  \u003cTASK\u003e\n  ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n  netlink_dump+0x333/0x880\n  netlink_recvmsg+0x3e2/0x4b0\n  ? aa_sk_perm+0x184/0x450\n  sock_recvmsg+0xde/0xf0\n\n Allocated by task 133:\n  kmem_cache_alloc_noprof+0x134/0x440\n  __nf_conntrack_alloc+0xa8/0x2b0\n  ctnetlink_create_conntrack+0xa1/0x900\n  ctnetlink_new_conntrack+0x3cf/0x7d0\n  nfnetlink_rcv_msg+0x48e/0x510\n  netlink_rcv_skb+0xc9/0x1f0\n  nfnetlink_rcv+0xdb/0x220\n  netlink_unicast+0x3ec/0x590\n  netlink_sendmsg+0x397/0x690\n  __sys_sendmsg+0xf4/0x180\n\n Freed by task 0:\n  slab_free_after_rcu_debug+0xad/0x1e0\n  rcu_core+0x5c3/0x9c0"
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23458\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-03T16:16:32.647\",\"lastModified\":\"2026-07-24T22:10:00.140\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()\\n\\nctnetlink_dump_exp_ct() stores a conntrack pointer in cb-\u003edata for the\\nnetlink dump callback ctnetlink_exp_ct_dump_table(), but drops the\\nconntrack reference immediately after netlink_dump_start().  When the\\ndump spans multiple rounds, the second recvmsg() triggers the dump\\ncallback which dereferences the now-freed conntrack via nfct_help(ct),\\nleading to a use-after-free on ct-\u003eext.\\n\\nThe bug is that the netlink_dump_control has no .start or .done\\ncallbacks to manage the conntrack reference across dump rounds.  Other\\ndump functions in the same file (e.g. ctnetlink_get_conntrack) properly\\nuse .start/.done callbacks for this purpose.\\n\\nFix this by adding .start and .done callbacks that hold and release the\\nconntrack reference for the duration of the dump, and move the\\nnfct_help() call after the cb-\u003eargs[0] early-return check in the dump\\ncallback to avoid dereferencing ct-\u003eext unnecessarily.\\n\\n BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0\\n Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133\\n\\n CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY\\n Call Trace:\\n  \u003cTASK\u003e\\n  ctnetlink_exp_ct_dump_table+0x4f/0x2e0\\n  netlink_dump+0x333/0x880\\n  netlink_recvmsg+0x3e2/0x4b0\\n  ? aa_sk_perm+0x184/0x450\\n  sock_recvmsg+0xde/0xf0\\n\\n Allocated by task 133:\\n  kmem_cache_alloc_noprof+0x134/0x440\\n  __nf_conntrack_alloc+0xa8/0x2b0\\n  ctnetlink_create_conntrack+0xa1/0x900\\n  ctnetlink_new_conntrack+0x3cf/0x7d0\\n  nfnetlink_rcv_msg+0x48e/0x510\\n  netlink_rcv_skb+0xc9/0x1f0\\n  nfnetlink_rcv+0xdb/0x220\\n  netlink_unicast+0x3ec/0x590\\n  netlink_sendmsg+0x397/0x690\\n  __sys_sendmsg+0xf4/0x180\\n\\n Freed by task 0:\\n  slab_free_after_rcu_debug+0xad/0x1e0\\n  rcu_core+0x5c3/0x9c0\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nnetfilter: ctnetlink: corrige uso despu\u00e9s de liberaci\u00f3n en ctnetlink_dump_exp_ct()\\n\\nctnetlink_dump_exp_ct() almacena un puntero conntrack en cb -\u003e data para la devoluci\u00f3n de llamada de volcado netlink ctnetlink_exp_ct_dump_table(), pero libera la referencia conntrack inmediatamente despu\u00e9s de netlink_dump_start(). Cuando el volcado abarca m\u00faltiples rondas, el segundo recvmsg() activa la devoluci\u00f3n de llamada de volcado que desreferencia el conntrack ahora liberado a trav\u00e9s de nfct_help(ct), lo que lleva a un uso despu\u00e9s de liberaci\u00f3n en ct -\u003e ext.\\n\\nEl error es que netlink_dump_control no tiene devoluciones de llamada .start o .done para gestionar la referencia conntrack a trav\u00e9s de las rondas de volcado. Otras funciones de volcado en el mismo archivo (p. ej., ctnetlink_get_conntrack) utilizan correctamente las devoluciones de llamada .start/.done para este prop\u00f3sito.\\n\\nSolucione esto a\u00f1adiendo devoluciones de llamada .start y .done que retienen y liberan la referencia conntrack durante la duraci\u00f3n del volcado, y mueva la llamada a nfct_help() despu\u00e9s de la comprobaci\u00f3n de retorno anticipado cb -\u003e args[0] en la devoluci\u00f3n de llamada de volcado para evitar desreferenciar ct -\u003e ext innecesariamente.\\n\\n ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n de slab en ctnetlink_exp_ct_dump_table+0x4f/0x2e0\\n Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88810597ebf0 por la tarea ctnetlink_poc/133\\n\\n CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc No contaminado 7.0.0-rc2+ #3 PREEMPTLAZY\\n Traza de Llamada:\\n  \u003cTAREA\u003e\\n  ctnetlink_exp_ct_dump_table+0x4f/0x2e0\\n  netlink_dump+0x333/0x880\\n  netlink_recvmsg+0x3e2/0x4b0\\n  ? aa_sk_perm+0x184/0x450\\n  sock_recvmsg+0xde/0xf0\\n\\n Asignado por la tarea 133:\\n  kmem_cache_alloc_noprof+0x134/0x440\\n  __nf_conntrack_alloc+0xa8/0x2b0\\n  ctnetlink_create_conntrack+0xa1/0x900\\n  ctnetlink_new_conntrack+0x3cf/0x7d0\\n  nfnetlink_rcv_msg+0x48e/0x510\\n  netlink_rcv_skb+0xc9/0x1f0\\n  nfnetlink_rcv+0xdb/0x220\\n  netlink_unicast+0x3ec/0x590\\n  netlink_sendmsg+0x397/0x690\\n  __sys_sendmsg+0xf4/0x180\\n\\n Liberado por la tarea 0:\\n  slab_free_after_rcu_debug+0xad/0x1e0\\n  rcu_core+0x5c3/0x9c0\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netfilter/nf_conntrack_netlink.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"d8cd0efbccc5cfb0a80da744a7da76e1333ab925\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"9821b47f669eb82791fa0b1a6ebaf9aa219bea72\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"bdf2724eefd4455a66863abb025bab8d3aa98c57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"f04cc86d59906513d2d62183b882966fc0ae0390\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"f025171feef2ac65663d7986f1d5ff0c28d6b2a9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"04c8907ce4e3d3e26c5e1a3e47aa5d17082cbb56\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"cd541f15b60e2257441398cf495d978f816d09f8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e844a928431fa8f1359d1f4f2cef53d9b446bf52\",\"lessThan\":\"5cb81eeda909dbb2def209dd10636b51549a3f8a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/netfilter/nf_conntrack_netlink.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.253\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.167\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.78\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.20\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.10\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.10\",\"versionEndExcluding\":\"5.10.253\",\"matchCriteriaId\":\"405792BF-85EC-437A-8C66-75001E62869B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.203\",\"matchCriteriaId\":\"20DDB3E9-AABF-4107-ADB0-5362AA067045\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.167\",\"matchCriteriaId\":\"2EDC6BAF-B710-4E26-B6AA-D68922EE7B43\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.130\",\"matchCriteriaId\":\"C57BB918-DF28-46B3-94F7-144176841267\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.78\",\"matchCriteriaId\":\"28D591F5-B196-4CC9-905C-DC80F116E7A8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.20\",\"matchCriteriaId\":\"E5571059-6552-48E7-9BEF-3E358C387171\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.10\",\"matchCriteriaId\":\"96D34333-38BE-4414-9E79-6EB764329581\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"F253B622-8837-4245-BCE5-A7BF8FC76A16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F666C8D8-6538-46D4-B318-87610DE64C34\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"02259FDA-961B-47BC-AE7F-93D7EC6E90C2\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/04c8907ce4e3d3e26c5e1a3e47aa5d17082cbb56\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5cb81eeda909dbb2def209dd10636b51549a3f8a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9821b47f669eb82791fa0b1a6ebaf9aa219bea72\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bdf2724eefd4455a66863abb025bab8d3aa98c57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cd541f15b60e2257441398cf495d978f816d09f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d8cd0efbccc5cfb0a80da744a7da76e1333ab925\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f025171feef2ac65663d7986f1d5ff0c28d6b2a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f04cc86d59906513d2d62183b882966fc0ae0390\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-082556.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T11:52:53+00:00",
      "cve": "CVE-2026-23458",
      "id": "CVE-2026-23458",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23458.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-19T17:42:11Z",
      "cve": "CVE-2026-23458",
      "id": "CVE-2026-23458",
      "initial_release_date": "2026-04-03T23:27:21Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "467",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "517",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23458",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23458.json",
      "version": "24"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.