CVE-2024-56647 (GCVE-0-2024-56647)

Vulnerability from cvelistv5 – Published: 2024-12-27 15:02 – Updated: 2026-06-01 16:04
VLAI
Title
net: Fix icmp host relookup triggering ip_rt_bug
Summary
In the Linux kernel, the following vulnerability has been resolved: net: Fix icmp host relookup triggering ip_rt_bug arp link failure may trigger ip_rt_bug while xfrm enabled, call trace is: WARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20 Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:ip_rt_bug+0x14/0x20 Call Trace: <IRQ> ip_send_skb+0x14/0x40 __icmp_send+0x42d/0x6a0 ipv4_link_failure+0xe2/0x1d0 arp_error_report+0x3c/0x50 neigh_invalidate+0x8d/0x100 neigh_timer_handler+0x2e1/0x330 call_timer_fn+0x21/0x120 __run_timer_base.part.0+0x1c9/0x270 run_timer_softirq+0x4c/0x80 handle_softirqs+0xac/0x280 irq_exit_rcu+0x62/0x80 sysvec_apic_timer_interrupt+0x77/0x90 The script below reproduces this scenario: ip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \ dir out priority 0 ptype main flag localok icmp ip l a veth1 type veth ip a a 192.168.141.111/24 dev veth0 ip l s veth0 up ping 192.168.141.155 -c 1 icmp_route_lookup() create input routes for locally generated packets while xfrm relookup ICMP traffic.Then it will set input route (dst->out = ip_rt_bug) to skb for DESTUNREACH. For ICMP err triggered by locally generated packets, dst->dev of output route is loopback. Generally, xfrm relookup verification is not required on loopback interfaces (net.ipv4.conf.lo.disable_xfrm = 1). Skip icmp relookup for locally generated packets to fix it.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 , < d50981aaaefc3b04490fbc8274d37881a2b1b112 (git)
Affected: 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 , < da54b3039d436227deebbc202cefea63bd318a38 (git)
Affected: 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 , < 9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f (git)
Affected: 8b7817f3a959ed99d7443afc12f78a7e1fcc2063 , < c44daa7e3c73229f7ac74985acb8c7fb909c4e0a (git)
Create a notification for this product.
Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.5 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Fix icmp host relookup triggering ip_rt_bug\n\narp link failure may trigger ip_rt_bug while xfrm enabled, call trace is:\n\nWARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20\nModules linked in:\nCPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:ip_rt_bug+0x14/0x20\nCall Trace:\n \u003cIRQ\u003e\n ip_send_skb+0x14/0x40\n __icmp_send+0x42d/0x6a0\n ipv4_link_failure+0xe2/0x1d0\n arp_error_report+0x3c/0x50\n neigh_invalidate+0x8d/0x100\n neigh_timer_handler+0x2e1/0x330\n call_timer_fn+0x21/0x120\n __run_timer_base.part.0+0x1c9/0x270\n run_timer_softirq+0x4c/0x80\n handle_softirqs+0xac/0x280\n irq_exit_rcu+0x62/0x80\n sysvec_apic_timer_interrupt+0x77/0x90\n\nThe script below reproduces this scenario:\nip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \\\n\tdir out priority 0 ptype main flag localok icmp\nip l a veth1 type veth\nip a a 192.168.141.111/24 dev veth0\nip l s veth0 up\nping 192.168.141.155 -c 1\n\nicmp_route_lookup() create input routes for locally generated packets\nwhile xfrm relookup ICMP traffic.Then it will set input route\n(dst-\u003eout = ip_rt_bug) to skb for DESTUNREACH.\n\nFor ICMP err triggered by locally generated packets, dst-\u003edev of output\nroute is loopback. Generally, xfrm relookup verification is not required\non loopback interfaces (net.ipv4.conf.lo.disable_xfrm = 1).\n\nSkip icmp relookup for locally generated packets to fix it."
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: Fix icmp host relookup triggering ip_rt_bug\\n\\narp link failure may trigger ip_rt_bug while xfrm enabled, call trace is:\\n\\nWARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20\\nModules linked in:\\nCPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:ip_rt_bug+0x14/0x20\\nCall Trace:\\n \u003cIRQ\u003e\\n ip_send_skb+0x14/0x40\\n __icmp_send+0x42d/0x6a0\\n ipv4_link_failure+0xe2/0x1d0\\n arp_error_report+0x3c/0x50\\n neigh_invalidate+0x8d/0x100\\n neigh_timer_handler+0x2e1/0x330\\n call_timer_fn+0x21/0x120\\n __run_timer_base.part.0+0x1c9/0x270\\n run_timer_softirq+0x4c/0x80\\n handle_softirqs+0xac/0x280\\n irq_exit_rcu+0x62/0x80\\n sysvec_apic_timer_interrupt+0x77/0x90\\n\\nThe script below reproduces this scenario:\\nip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \\\\\\n\\tdir out priority 0 ptype main flag localok icmp\\nip l a veth1 type veth\\nip a a 192.168.141.111/24 dev veth0\\nip l s veth0 up\\nping 192.168.141.155 -c 1\\n\\nicmp_route_lookup() create input routes for locally generated packets\\nwhile xfrm relookup ICMP traffic.Then it will set input route\\n(dst-\u003eout = ip_rt_bug) to skb for DESTUNREACH.\\n\\nFor ICMP err triggered by locally generated packets, dst-\u003edev of output\\nroute is loopback. Generally, xfrm relookup verification is not required\\non loopback interfaces (net.ipv4.conf.lo.disable_xfrm = 1).\\n\\nSkip icmp relookup for locally generated packets to fix it.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: Fix icmp host relookup triggering ip_rt_bug arp link failure may trigger ip_rt_bug while xfrm enabled, call trace is: ADVERTENCIA: CPU: 0 PID: 0 en net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20 M\\u00f3dulos vinculados en: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 No contaminado 6.12.0-rc6-00077-g2e1b3cc9d7f7 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 RIP: 0010:ip_rt_bug+0x14/0x20 Seguimiento de llamadas:  ip_send_skb+0x14/0x40 __icmp_send+0x42d/0x6a0 error de enlace ipv4+0xe2/0x1d0 informe de error arp+0x3c/0x50 invalidaci\\u00f3n vecinal+0x8d/0x100 controlador de temporizador vecinal+0x2e1/0x330 funci\\u00f3n de temporizador de llamada+0x21/0x120 __base de temporizador de ejecuci\\u00f3n.parte.0+0x1c9/0x270 temporizador de ejecuci\\u00f3n softirq+0x4c/0x80 controlador de softirqs+0xac/0x280 irq_exit_rcu+0x62/0x80 sysvec_apic_timer_interrupt+0x77/0x90 El script a continuaci\\u00f3n reproduce este escenario: ip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \\\\ dir out priority 0 ptype main flag localok icmp ip la veth1 type veth ip aa 192.168.141.111/24 dev veth0 ip ls veth0 up ping 192.168.141.155 -c 1 icmp_route_lookup() crea rutas de entrada para paquetes generados localmente mientras xfrm vuelve a buscar tr\\u00e1fico ICMP. Luego, establecer\\u00e1 la ruta de entrada (dst-\u0026gt;out = ip_rt_bug) en skb para DESTUNREACH. Para el error ICMP activado por paquetes generados localmente, dst-\u0026gt;dev de la ruta de salida es loopback. En general, no se requiere la verificaci\\u00f3n de reb\\u00fasqueda de xfrm en interfaces de bucle invertido (net.ipv4.conf.lo.disable_xfrm = 1). Omita la reb\\u00fasqueda de ICMP para paquetes generados localmente para solucionarlo.\"}]",
      "id": "CVE-2024-56647",
      "lastModified": "2025-01-06T19:45:53.687",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-12-27T15:15:24.467",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/c44daa7e3c73229f7ac74985acb8c7fb909c4e0a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}]",
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      "vulnStatus": "Analyzed",
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    },
    "microsoft_vex": {
      "current_release_date": "2026-06-23T14:40:36.000Z",
      "cve": "CVE-2024-56647",
      "id": "msrc_CVE-2024-56647",
      "initial_release_date": "2024-12-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "17",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "net: Fix icmp host relookup triggering ip_rt_bug",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-56647.json",
      "version": "14"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-56647\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T15:15:24.467\",\"lastModified\":\"2026-06-17T08:12:38.277\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: Fix icmp host relookup triggering ip_rt_bug\\n\\narp link failure may trigger ip_rt_bug while xfrm enabled, call trace is:\\n\\nWARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20\\nModules linked in:\\nCPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:ip_rt_bug+0x14/0x20\\nCall Trace:\\n \u003cIRQ\u003e\\n ip_send_skb+0x14/0x40\\n __icmp_send+0x42d/0x6a0\\n ipv4_link_failure+0xe2/0x1d0\\n arp_error_report+0x3c/0x50\\n neigh_invalidate+0x8d/0x100\\n neigh_timer_handler+0x2e1/0x330\\n call_timer_fn+0x21/0x120\\n __run_timer_base.part.0+0x1c9/0x270\\n run_timer_softirq+0x4c/0x80\\n handle_softirqs+0xac/0x280\\n irq_exit_rcu+0x62/0x80\\n sysvec_apic_timer_interrupt+0x77/0x90\\n\\nThe script below reproduces this scenario:\\nip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \\\\\\n\\tdir out priority 0 ptype main flag localok icmp\\nip l a veth1 type veth\\nip a a 192.168.141.111/24 dev veth0\\nip l s veth0 up\\nping 192.168.141.155 -c 1\\n\\nicmp_route_lookup() create input routes for locally generated packets\\nwhile xfrm relookup ICMP traffic.Then it will set input route\\n(dst-\u003eout = ip_rt_bug) to skb for DESTUNREACH.\\n\\nFor ICMP err triggered by locally generated packets, dst-\u003edev of output\\nroute is loopback. Generally, xfrm relookup verification is not required\\non loopback interfaces (net.ipv4.conf.lo.disable_xfrm = 1).\\n\\nSkip icmp relookup for locally generated packets to fix it.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: Fix icmp host relookup triggering ip_rt_bug arp link failure may trigger ip_rt_bug while xfrm enabled, call trace is: ADVERTENCIA: CPU: 0 PID: 0 en net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20 M\u00f3dulos vinculados en: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 No contaminado 6.12.0-rc6-00077-g2e1b3cc9d7f7 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 RIP: 0010:ip_rt_bug+0x14/0x20 Seguimiento de llamadas:  ip_send_skb+0x14/0x40 __icmp_send+0x42d/0x6a0 error de enlace ipv4+0xe2/0x1d0 informe de error arp+0x3c/0x50 invalidaci\u00f3n vecinal+0x8d/0x100 controlador de temporizador vecinal+0x2e1/0x330 funci\u00f3n de temporizador de llamada+0x21/0x120 __base de temporizador de ejecuci\u00f3n.parte.0+0x1c9/0x270 temporizador de ejecuci\u00f3n softirq+0x4c/0x80 controlador de softirqs+0xac/0x280 irq_exit_rcu+0x62/0x80 sysvec_apic_timer_interrupt+0x77/0x90 El script a continuaci\u00f3n reproduce este escenario: ip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \\\\ dir out priority 0 ptype main flag localok icmp ip la veth1 type veth ip aa 192.168.141.111/24 dev veth0 ip ls veth0 up ping 192.168.141.155 -c 1 icmp_route_lookup() crea rutas de entrada para paquetes generados localmente mientras xfrm vuelve a buscar tr\u00e1fico ICMP. Luego, establecer\u00e1 la ruta de entrada (dst-\u0026gt;out = ip_rt_bug) en skb para DESTUNREACH. Para el error ICMP activado por paquetes generados localmente, dst-\u0026gt;dev de la ruta de salida es loopback. En general, no se requiere la verificaci\u00f3n de reb\u00fasqueda de xfrm en interfaces de bucle invertido (net.ipv4.conf.lo.disable_xfrm = 1). Omita la reb\u00fasqueda de ICMP para paquetes generados localmente para solucionarlo.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/ipv4/icmp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\",\"lessThan\":\"d50981aaaefc3b04490fbc8274d37881a2b1b112\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\",\"lessThan\":\"da54b3039d436227deebbc202cefea63bd318a38\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\",\"lessThan\":\"9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\",\"lessThan\":\"c44daa7e3c73229f7ac74985acb8c7fb909c4e0a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/ipv4/icmp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.25\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.25\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.140\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.5\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-10-01T20:00:32.629636Z\",\"id\":\"CVE-2024-56647\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.25\",\"versionEndExcluding\":\"6.12.5\",\"matchCriteriaId\":\"C9393D06-5F2B-4F68-B5D5-C0819E4C7197\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c44daa7e3c73229f7ac74985acb8c7fb909c4e0a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d50981aaaefc3b04490fbc8274d37881a2b1b112\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/da54b3039d436227deebbc202cefea63bd318a38\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T08:16:48+00:00",
      "cve": "CVE-2024-56647",
      "id": "CVE-2024-56647",
      "initial_release_date": "2024-12-27T00:00:00+00:00",
      "product_status:fixed": "305",
      "product_status:known_affected": "112",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: Fix icmp host relookup triggering ip_rt_bug",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-56647.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-56647\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T20:00:32.629636Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T15:44:22.379Z\"}}], \"cna\": {\"title\": \"net: Fix icmp host relookup triggering ip_rt_bug\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\", \"lessThan\": \"d50981aaaefc3b04490fbc8274d37881a2b1b112\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\", \"lessThan\": \"da54b3039d436227deebbc202cefea63bd318a38\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\", \"lessThan\": \"9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8b7817f3a959ed99d7443afc12f78a7e1fcc2063\", \"lessThan\": \"c44daa7e3c73229f7ac74985acb8c7fb909c4e0a\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/icmp.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.25\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.25\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.175\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.140\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/icmp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d50981aaaefc3b04490fbc8274d37881a2b1b112\"}, {\"url\": \"https://git.kernel.org/stable/c/da54b3039d436227deebbc202cefea63bd318a38\"}, {\"url\": \"https://git.kernel.org/stable/c/9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f\"}, {\"url\": \"https://git.kernel.org/stable/c/c44daa7e3c73229f7ac74985acb8c7fb909c4e0a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: Fix icmp host relookup triggering ip_rt_bug\\n\\narp link failure may trigger ip_rt_bug while xfrm enabled, call trace is:\\n\\nWARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20\\nModules linked in:\\nCPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:ip_rt_bug+0x14/0x20\\nCall Trace:\\n \u003cIRQ\u003e\\n ip_send_skb+0x14/0x40\\n __icmp_send+0x42d/0x6a0\\n ipv4_link_failure+0xe2/0x1d0\\n arp_error_report+0x3c/0x50\\n neigh_invalidate+0x8d/0x100\\n neigh_timer_handler+0x2e1/0x330\\n call_timer_fn+0x21/0x120\\n __run_timer_base.part.0+0x1c9/0x270\\n run_timer_softirq+0x4c/0x80\\n handle_softirqs+0xac/0x280\\n irq_exit_rcu+0x62/0x80\\n sysvec_apic_timer_interrupt+0x77/0x90\\n\\nThe script below reproduces this scenario:\\nip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \\\\\\n\\tdir out priority 0 ptype main flag localok icmp\\nip l a veth1 type veth\\nip a a 192.168.141.111/24 dev veth0\\nip l s veth0 up\\nping 192.168.141.155 -c 1\\n\\nicmp_route_lookup() create input routes for locally generated packets\\nwhile xfrm relookup ICMP traffic.Then it will set input route\\n(dst-\u003eout = ip_rt_bug) to skb for DESTUNREACH.\\n\\nFor ICMP err triggered by locally generated packets, dst-\u003edev of output\\nroute is loopback. Generally, xfrm relookup verification is not required\\non loopback interfaces (net.ipv4.conf.lo.disable_xfrm = 1).\\n\\nSkip icmp relookup for locally generated packets to fix it.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.175\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.140\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.5\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13\", \"versionStartIncluding\": \"2.6.25\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-06-01T16:04:51.318Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-56647\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-01T16:04:51.318Z\", \"dateReserved\": \"2024-12-27T15:00:39.840Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-12-27T15:02:47.969Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.