fkie_cve-2022-49561
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-10-24 15:50
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caedPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/04e4a11dc723c52db7a36dc58f0d69ce6426f8f0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/56b14ecec97f39118bf85c9ac2438c5a949509edPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8afPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: re-fetch conntrack after insertion\n\nIn case the conntrack is clashing, insertion can free skb-\u003e_nfct and\nset skb-\u003e_nfct to the already-confirmed entry.\n\nThis wasn\u0027t found before because the conntrack entry and the extension\nspace used to free\u0027d after an rcu grace period, plus the race needs\nevents enabled to trigger."
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: conntrack: volver a obtener conntrack despu\u00e9s de la inserci\u00f3n En caso de que conntrack est\u00e9 en conflicto, la inserci\u00f3n puede liberar skb-\u0026gt;_nfct y establecer skb-\u0026gt;_nfct en la entrada ya confirmada. Esto no se encontr\u00f3 antes porque la entrada conntrack y el espacio de extensi\u00f3n sol\u00edan liberarse despu\u00e9s de un per\u00edodo de gracia de rcu, adem\u00e1s de que la ejecuci\u00f3n necesita eventos habilitados para activarse."
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  "id": "CVE-2022-49561",
  "lastModified": "2025-10-24T15:50:35.257",
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-02-26T07:01:31.877",
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