CVE-2026-53151 (GCVE-0-2026-53151)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-06-28 06:39
VLAI
Title
rxrpc: Fix the ACK parser to extract the SACK table for parsing
Summary
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix the ACK parser to extract the SACK table for parsing Fix modification of the received skbuff in rxrpc_input_soft_acks() and a potential incorrect access of the buffer in a fragmented UDP packet (the packet would probably have to be deliberately pre-generated as fragmented) when AF_RXRPC tries to extract the contents of the SACK table by copying out the contents of the SACK table into a buffer before attempting to parse AF_RXRPC assumes that it can just call skb_condense() and then validly access the SACK table from skb->data and that it will be a flat buffer - but skb_condense() can silently fail to do anything under some circumstances. Note that whilst rxrpc_input_soft_acks() should be able to parse extended ACKs, the rest of AF_RXRPC doesn't currently support that. Further, there's then no need to call skb_condense() in rxrpc_input_ack(), so don't.
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
Linux Linux Affected: d57a3a151660902091491ac2633134e1be92557f , < 566c4c1244de50fbff1f89ff93c9d7b0fc256db4 (git)
Affected: d57a3a151660902091491ac2633134e1be92557f , < 224298450be5c04d2a6ea1c2a94669d7ebf65d00 (git)
Affected: d57a3a151660902091491ac2633134e1be92557f , < 333b6d5bb9f87827ac2639c737bf9613dbae7253 (git)
Create a notification for this product.
Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/input.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "566c4c1244de50fbff1f89ff93c9d7b0fc256db4",
              "status": "affected",
              "version": "d57a3a151660902091491ac2633134e1be92557f",
              "versionType": "git"
            },
            {
              "lessThan": "224298450be5c04d2a6ea1c2a94669d7ebf65d00",
              "status": "affected",
              "version": "d57a3a151660902091491ac2633134e1be92557f",
              "versionType": "git"
            },
            {
              "lessThan": "333b6d5bb9f87827ac2639c737bf9613dbae7253",
              "status": "affected",
              "version": "d57a3a151660902091491ac2633134e1be92557f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/input.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.36",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix the ACK parser to extract the SACK table for parsing\n\nFix modification of the received skbuff in rxrpc_input_soft_acks() and a\npotential incorrect access of the buffer in a fragmented UDP packet (the\npacket would probably have to be deliberately pre-generated as fragmented)\nwhen AF_RXRPC tries to extract the contents of the SACK table by copying\nout the contents of the SACK table into a buffer before attempting to parse\n\nAF_RXRPC assumes that it can just call skb_condense() and then validly\naccess the SACK table from skb-\u003edata and that it will be a flat buffer -\nbut skb_condense() can silently fail to do anything under some\ncircumstances.\n\nNote that whilst rxrpc_input_soft_acks() should be able to parse extended\nACKs, the rest of AF_RXRPC doesn\u0027t currently support that.\n\nFurther, there\u0027s then no need to call skb_condense() in rxrpc_input_ack(),\nso don\u0027t."
        }
      ],
      "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"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-28T06:39:33.520Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/566c4c1244de50fbff1f89ff93c9d7b0fc256db4"
        },
        {
          "url": "https://git.kernel.org/stable/c/224298450be5c04d2a6ea1c2a94669d7ebf65d00"
        },
        {
          "url": "https://git.kernel.org/stable/c/333b6d5bb9f87827ac2639c737bf9613dbae7253"
        }
      ],
      "title": "rxrpc: Fix the ACK parser to extract the SACK table for parsing",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53151",
    "datePublished": "2026-06-25T08:38:36.187Z",
    "dateReserved": "2026-06-09T07:44:35.388Z",
    "dateUpdated": "2026-06-28T06:39:33.520Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53151",
      "date": "2026-07-02",
      "epss": "0.00481",
      "percentile": "0.37988"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53151\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-25T09:16:32.480\",\"lastModified\":\"2026-06-30T14:44:27.313\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nrxrpc: Fix the ACK parser to extract the SACK table for parsing\\n\\nFix modification of the received skbuff in rxrpc_input_soft_acks() and a\\npotential incorrect access of the buffer in a fragmented UDP packet (the\\npacket would probably have to be deliberately pre-generated as fragmented)\\nwhen AF_RXRPC tries to extract the contents of the SACK table by copying\\nout the contents of the SACK table into a buffer before attempting to parse\\n\\nAF_RXRPC assumes that it can just call skb_condense() and then validly\\naccess the SACK table from skb-\u003edata and that it will be a flat buffer -\\nbut skb_condense() can silently fail to do anything under some\\ncircumstances.\\n\\nNote that whilst rxrpc_input_soft_acks() should be able to parse extended\\nACKs, the rest of AF_RXRPC doesn\u0027t currently support that.\\n\\nFurther, there\u0027s then no need to call skb_condense() in rxrpc_input_ack(),\\nso don\u0027t.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/rxrpc/input.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d57a3a151660902091491ac2633134e1be92557f\",\"lessThan\":\"566c4c1244de50fbff1f89ff93c9d7b0fc256db4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d57a3a151660902091491ac2633134e1be92557f\",\"lessThan\":\"224298450be5c04d2a6ea1c2a94669d7ebf65d00\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d57a3a151660902091491ac2633134e1be92557f\",\"lessThan\":\"333b6d5bb9f87827ac2639c737bf9613dbae7253\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/rxrpc/input.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.36\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.13\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"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/224298450be5c04d2a6ea1c2a94669d7ebf65d00\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/333b6d5bb9f87827ac2639c737bf9613dbae7253\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/566c4c1244de50fbff1f89ff93c9d7b0fc256db4\",\"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.