CVE-2026-72319 (GCVE-0-2026-72319)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:42
VLAI
Title
ipvs: ensure inner headers in ICMP errors are in headroom
Summary
In the Linux kernel, the following vulnerability has been resolved: ipvs: ensure inner headers in ICMP errors are in headroom Sashiko points out that after stripping the outer headers with pskb_pull() we should ensure the inner IP headers in ICMP errors from tunnels are present in the skb headroom for functions like ipv4_update_pmtu(), icmp_send() and IP_VS_DBG(). Also, add more checks for the length of the inner headers.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < 19657b3a17b774ae4e2f2635b5ae8638c9344a40 (git)
Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < dac813101914c21219ac221a60a31a11bc90e7ec (git)
Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < dd22f74a09e25ca298ced0a3763ef353242cb78d (git)
Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < 9bc9b95aee2b2e3f1301a16a67ee504960402875 (git)
Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < a735f9964a3d9ed97daf9b08507f8b5bcafe6326 (git)
Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < 8f48cfe657409fb5c7ba0521b14da6d47546d9cf (git)
Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < 92185d6f7819bc558939ae83de7b1abe90e3b5c2 (git)
Affected: f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e , < 3f7a535ff0fa627a0132803e4c2f903ceffcbc1c (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "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-\u003edata 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-\u003edata 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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72319",
      "date": "2026-08-18",
      "epss": "0.00755",
      "percentile": "0.52101"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72319\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:22:04.857\",\"lastModified\":\"2026-08-17T06:18:35.327\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netfilter/ipvs/ip_vs_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"19657b3a17b774ae4e2f2635b5ae8638c9344a40\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"dac813101914c21219ac221a60a31a11bc90e7ec\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"dd22f74a09e25ca298ced0a3763ef353242cb78d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"9bc9b95aee2b2e3f1301a16a67ee504960402875\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"a735f9964a3d9ed97daf9b08507f8b5bcafe6326\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"8f48cfe657409fb5c7ba0521b14da6d47546d9cf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"92185d6f7819bc558939ae83de7b1abe90e3b5c2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e\",\"lessThan\":\"3f7a535ff0fa627a0132803e4c2f903ceffcbc1c\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/netfilter/ipvs/ip_vs_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19657b3a17b774ae4e2f2635b5ae8638c9344a40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3f7a535ff0fa627a0132803e4c2f903ceffcbc1c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8f48cfe657409fb5c7ba0521b14da6d47546d9cf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/92185d6f7819bc558939ae83de7b1abe90e3b5c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9bc9b95aee2b2e3f1301a16a67ee504960402875\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a735f9964a3d9ed97daf9b08507f8b5bcafe6326\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dac813101914c21219ac221a60a31a11bc90e7ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dd22f74a09e25ca298ced0a3763ef353242cb78d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}



Log in or create an account to share your comment.




Tags
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.