{"api_version":"1","generated_at":"2026-08-22T00:56:19+00:00","cve":"CVE-2026-72319","urls":{"html":"https://cve.report/CVE-2026-72319","api":"https://cve.report/api/cve/CVE-2026-72319.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72319","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72319"},"summary":{"title":"ipvs: ensure inner headers in ICMP errors are in headroom","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: ensure inner headers in ICMP errors are in headroom\n\nSashiko points out that after stripping the outer headers\nwith pskb_pull() we should ensure the inner IP headers\nin ICMP errors from tunnels are present in the skb headroom\nfor functions like ipv4_update_pmtu(), icmp_send() and\nIP_VS_DBG().\n\nAlso, add more checks for the length of the inner headers.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:04","updated_at":"2026-08-17 06:18:35"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/a735f9964a3d9ed97daf9b08507f8b5bcafe6326","name":"https://git.kernel.org/stable/c/a735f9964a3d9ed97daf9b08507f8b5bcafe6326","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9bc9b95aee2b2e3f1301a16a67ee504960402875","name":"https://git.kernel.org/stable/c/9bc9b95aee2b2e3f1301a16a67ee504960402875","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd22f74a09e25ca298ced0a3763ef353242cb78d","name":"https://git.kernel.org/stable/c/dd22f74a09e25ca298ced0a3763ef353242cb78d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/92185d6f7819bc558939ae83de7b1abe90e3b5c2","name":"https://git.kernel.org/stable/c/92185d6f7819bc558939ae83de7b1abe90e3b5c2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19657b3a17b774ae4e2f2635b5ae8638c9344a40","name":"https://git.kernel.org/stable/c/19657b3a17b774ae4e2f2635b5ae8638c9344a40","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dac813101914c21219ac221a60a31a11bc90e7ec","name":"https://git.kernel.org/stable/c/dac813101914c21219ac221a60a31a11bc90e7ec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3f7a535ff0fa627a0132803e4c2f903ceffcbc1c","name":"https://git.kernel.org/stable/c/3f7a535ff0fa627a0132803e4c2f903ceffcbc1c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8f48cfe657409fb5c7ba0521b14da6d47546d9cf","name":"https://git.kernel.org/stable/c/8f48cfe657409fb5c7ba0521b14da6d47546d9cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72319","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72319","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e 19657b3a17b774ae4e2f2635b5ae8638c9344a40 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e dac813101914c21219ac221a60a31a11bc90e7ec git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e dd22f74a09e25ca298ced0a3763ef353242cb78d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e 9bc9b95aee2b2e3f1301a16a67ee504960402875 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72319","cve":"CVE-2026-72319","epss":"0.007550000","percentile":"0.520770000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/ipvs/ip_vs_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"19657b3a17b774ae4e2f2635b5ae8638c9344a40","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"},{"lessThan":"dac813101914c21219ac221a60a31a11bc90e7ec","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"},{"lessThan":"dd22f74a09e25ca298ced0a3763ef353242cb78d","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"},{"lessThan":"9bc9b95aee2b2e3f1301a16a67ee504960402875","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"},{"lessThan":"a735f9964a3d9ed97daf9b08507f8b5bcafe6326","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"},{"lessThan":"8f48cfe657409fb5c7ba0521b14da6d47546d9cf","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"},{"lessThan":"92185d6f7819bc558939ae83de7b1abe90e3b5c2","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"},{"lessThan":"3f7a535ff0fa627a0132803e4c2f903ceffcbc1c","status":"affected","version":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/ipvs/ip_vs_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.7"},{"lessThan":"3.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"3.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: ensure inner headers in ICMP errors are in headroom\n\nSashiko points out that after stripping the outer headers\nwith pskb_pull() we should ensure the inner IP headers\nin ICMP errors from tunnels are present in the skb headroom\nfor functions like ipv4_update_pmtu(), icmp_send() and\nIP_VS_DBG().\n\nAlso, add more checks for the length of the inner headers."}],"metrics":[{"cvssV3_1":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:N - Crafted IPv4 ICMP error packets reach ip_vs_in_icmp() through IPVS netfilter LOCAL_IN and FORWARD hooks on internet-facing load balancers and Kubernetes kube-proxy IPVS nodes; remote senders trigger the tunnel PMTUD handler without local access.\nAC:L - An attacker controls ICMP nesting, IPIP/UDP/GRE encapsulation, skb fragmentation/non-linear layout, and can establish matching IPVS TUN connections through the VIP; no race or condition outside attacker control is required once IPVS tunnel mode is deployed.\nPR:N - IPVS configuration is an administrator deployment prerequisite; a remote attacker sending ICMP errors to an already-configured load balancer needs no credentials or host capabilities on the victim.\nUI:N - Exploitation is driven entirely by network packets processed automatically in softirq; no victim user action beyond normal traffic through the load balancer is required.\nS:U - Out-of-bounds kernel skb header access and route PMTU corruption remain within the host kernel authority; this is standard kernel compromise, not VM escape or sandbox crossing.\nC:H - After pskb_pull() without pskb_may_pull(), ipv4_update_pmtu() and ip_hdr() dereference skb->data that may lie past skb_tail_pointer or hold non-linear fragment data, constituting an out-of-bounds kernel read per CNA guidance.\nI:H - Mis-parsed inner IP header fields from unchecked skb->data drive ipv4_update_pmtu() route lookups and FNHE/PMTU updates with attacker-influenced saddr/daddr values, enabling unauthorized modification of kernel routing state.\nA:H - Out-of-bounds header access in the IPVS ICMP tunnel path can trigger kernel oops or panic, and a remote attacker can repeatedly send crafted ICMP errors to deny service on IPVS TUN load balancers."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:42:45.694Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/19657b3a17b774ae4e2f2635b5ae8638c9344a40"},{"url":"https://git.kernel.org/stable/c/dac813101914c21219ac221a60a31a11bc90e7ec"},{"url":"https://git.kernel.org/stable/c/dd22f74a09e25ca298ced0a3763ef353242cb78d"},{"url":"https://git.kernel.org/stable/c/9bc9b95aee2b2e3f1301a16a67ee504960402875"},{"url":"https://git.kernel.org/stable/c/a735f9964a3d9ed97daf9b08507f8b5bcafe6326"},{"url":"https://git.kernel.org/stable/c/8f48cfe657409fb5c7ba0521b14da6d47546d9cf"},{"url":"https://git.kernel.org/stable/c/92185d6f7819bc558939ae83de7b1abe90e3b5c2"},{"url":"https://git.kernel.org/stable/c/3f7a535ff0fa627a0132803e4c2f903ceffcbc1c"}],"title":"ipvs: ensure inner headers in ICMP errors are in headroom","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72319","datePublished":"2026-08-15T05:55:32.313Z","dateReserved":"2026-08-09T03:40:39.919Z","dateUpdated":"2026-08-17T05:42:45.694Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:04","lastModifiedDate":"2026-08-17 06:18:35","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72319","Ordinal":"1","Title":"ipvs: ensure inner headers in ICMP errors are in headroom","CVE":"CVE-2026-72319","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72319","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: ensure inner headers in ICMP errors are in headroom\n\nSashiko points out that after stripping the outer headers\nwith pskb_pull() we should ensure the inner IP headers\nin ICMP errors from tunnels are present in the skb headroom\nfor functions like ipv4_update_pmtu(), icmp_send() and\nIP_VS_DBG().\n\nAlso, add more checks for the length of the inner headers.","Type":"Description","Title":"ipvs: ensure inner headers in ICMP errors are in headroom"}]}}}