CVE-2026-98274 (GCVE-0-2026-98274)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:45 – Updated: 2026-10-06 08:45
VLAI
Title
net: psp: avoid conflicts with skb->decrypted and sk_validate_xmit_skb()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: psp: avoid conflicts with skb->decrypted and sk_validate_xmit_skb() PSP conflicts with TLS ULP in its usage of both skb->decrypted and sk->sk_validate_xmit_skb(). Make PSP mutually exclusive with TLS ULP, the only other user of either of these. As other users of skb->decrypted come along, they can be added to sk_has_decrypt_user(). It would make sense to also assert that sk->sk_validate_xmit_skb() is also NULL in both of these setup paths for similar future proofing, but the PSP listener/sk_clone() path is still broken and it could be seen as a regression to not allow rx assoc to run on a child of a listener socket with PSP tx assoc state. Include all TCP ULPs in the sk_has_decrypt_user() check, even though TLS is the only one that conflicts with PSP via the decrypted bit. This is intentional because PSP was not designed to be used with ULPs. It is best to close off surface area that may make bugs reachable, until someone wishes to design and test an actual user of PSP with ULPs.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < a13cca5ba5375f13cbdab545abfb5e288bef3f78 (git)
Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < c8c8c18862337c469e325c207601de3279847809 (git)
Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < a41f24c612c3f5139a3143307eb85bbcf1bd4d07 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "include/net/sock.h",
            "net/core/sock.c",
            "net/ipv4/tcp_ulp.c",
            "net/psp/psp_sock.c"
          ],
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          "vendor": "Linux",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: psp: avoid conflicts with skb-\u003edecrypted and sk_validate_xmit_skb()\n\nPSP conflicts with TLS ULP in its usage of both skb-\u003edecrypted and\nsk-\u003esk_validate_xmit_skb().\n\nMake PSP mutually exclusive with TLS ULP, the only other user of either\nof these. As other users of skb-\u003edecrypted come along, they can be added\nto sk_has_decrypt_user(). It would make sense to also assert that\nsk-\u003esk_validate_xmit_skb() is also NULL in both of these setup paths for\nsimilar future proofing, but the PSP listener/sk_clone() path is still\nbroken and it could be seen as a regression to not allow rx assoc to run\non a child of a listener socket with PSP tx assoc state.\n\nInclude all TCP ULPs in the sk_has_decrypt_user() check, even though TLS\nis the only one that conflicts with PSP via the decrypted bit. This is\nintentional because PSP was not designed to be used with ULPs. It is\nbest to close off surface area that may make bugs reachable, until\nsomeone wishes to design and test an actual user of PSP with ULPs."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:45:35.297Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/a13cca5ba5375f13cbdab545abfb5e288bef3f78"
        },
        {
          "url": "https://git.kernel.org/stable/c/c8c8c18862337c469e325c207601de3279847809"
        },
        {
          "url": "https://git.kernel.org/stable/c/a41f24c612c3f5139a3143307eb85bbcf1bd4d07"
        }
      ],
      "title": "net: psp: avoid conflicts with skb-\u003edecrypted and sk_validate_xmit_skb()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98274",
    "datePublished": "2026-10-06T08:45:35.297Z",
    "dateReserved": "2026-09-25T10:25:14.334Z",
    "dateUpdated": "2026-10-06T08:45:35.297Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-08",
      "epss": "0.00173",
      "percentile": "0.06189"
    },
    "nvd": {
      "cve": {
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          {
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                "product": "Linux",
                "programFiles": [
                  "include/net/sock.h",
                  "net/core/sock.c",
                  "net/ipv4/tcp_ulp.c",
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: psp: avoid conflicts with skb-\u003edecrypted and sk_validate_xmit_skb()\n\nPSP conflicts with TLS ULP in its usage of both skb-\u003edecrypted and\nsk-\u003esk_validate_xmit_skb().\n\nMake PSP mutually exclusive with TLS ULP, the only other user of either\nof these. As other users of skb-\u003edecrypted come along, they can be added\nto sk_has_decrypt_user(). It would make sense to also assert that\nsk-\u003esk_validate_xmit_skb() is also NULL in both of these setup paths for\nsimilar future proofing, but the PSP listener/sk_clone() path is still\nbroken and it could be seen as a regression to not allow rx assoc to run\non a child of a listener socket with PSP tx assoc state.\n\nInclude all TCP ULPs in the sk_has_decrypt_user() check, even though TLS\nis the only one that conflicts with PSP via the decrypted bit. This is\nintentional because PSP was not designed to be used with ULPs. It is\nbest to close off surface area that may make bugs reachable, until\nsomeone wishes to design and test an actual user of PSP with ULPs."
          }
        ],
        "id": "CVE-2026-98274",
        "lastModified": "2026-10-06T09:18:17.077",
        "metrics": {},
        "published": "2026-10-06T09:18:17.077",
        "references": [
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      "product_status:known_not_affected": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98274",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98274.json",
      "version": "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

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.