CVE-2026-46331 (GCVE-0-2026-46331)

Vulnerability from cvelistv5 – Published: 2026-06-16 06:26 – Updated: 2026-06-29 14:06
VLAI
Title
net/sched: fix pedit partial COW leading to page cache corruption
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd. Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-787 - Out-of-bounds Write
  • CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < 2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b (git)
Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < b198ed4e52580a7238c7c7082f03906f8b310313 (git)
Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < 3dee9d0c198faeb95d052c1b94c2958751a28512 (git)
Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < 899ee91156e57784090c5565e4f31bd7dbffbc5a (git)
Affected: d0c38a914b0c4c21d553da801003d36979016726 (git)
Affected: 2ec2dd7d51a9320151f275ddbb2b53260fb32ca1 (git)
Affected: abe35bf3be51482593076d516a680d79e5fbc8e1 (git)
Affected: b773640d5bb9e2acfd91e2695717af04d47aa116 (git)
Affected: c19cc520b3d69904e9518d401ad0df7f4702aca0 (git)
Affected: 4.19.244 , < 4.20 (semver)
Affected: 5.4.195 , < 5.5 (semver)
Affected: 5.10.117 , < 5.11 (semver)
Affected: 5.15.41 , < 5.16 (semver)
Affected: 5.17.9 , < 5.18 (semver)
Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (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
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      "containers": "{\"cna\": {\"title\": \"net/sched: fix pedit partial COW leading to page cache corruption\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8b796475fd7882663a870456466a4fb315cc1bd6\", \"lessThan\": \"2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8b796475fd7882663a870456466a4fb315cc1bd6\", \"lessThan\": \"b198ed4e52580a7238c7c7082f03906f8b310313\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8b796475fd7882663a870456466a4fb315cc1bd6\", \"lessThan\": \"3dee9d0c198faeb95d052c1b94c2958751a28512\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8b796475fd7882663a870456466a4fb315cc1bd6\", \"lessThan\": \"899ee91156e57784090c5565e4f31bd7dbffbc5a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d0c38a914b0c4c21d553da801003d36979016726\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2ec2dd7d51a9320151f275ddbb2b53260fb32ca1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"abe35bf3be51482593076d516a680d79e5fbc8e1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b773640d5bb9e2acfd91e2695717af04d47aa116\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c19cc520b3d69904e9518d401ad0df7f4702aca0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4.19.244\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.195\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.10.117\", \"lessThan\": \"5.11\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.15.41\", \"lessThan\": \"5.16\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.17.9\", \"lessThan\": \"5.18\", \"versionType\": \"semver\"}], \"programFiles\": [\"include/net/tc_act/tc_pedit.h\", \"net/sched/act_pedit.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.12.94\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.36\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"7.0.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.0.*\"}, {\"status\": \"unaffected\", \"version\": \"7.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/net/tc_act/tc_pedit.h\", \"net/sched/act_pedit.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b\"}, {\"url\": \"https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313\"}, {\"url\": \"https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512\"}, {\"url\": \"https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/sched: fix pedit partial COW leading to page cache corruption\\n\\ntcf_pedit_act() computes the COW range for skb_ensure_writable()\\nonce before the key loop using tcfp_off_max_hint, but the hint does\\nnot account for the runtime header offset added by typed keys. This\\ncan leave part of the write region un-COW\u0027d.\\n\\nFix by moving skb_ensure_writable() inside the per-key loop where\\nthe actual write offset is known, and add overflow checking on the\\noffset arithmetic. For negative offsets (e.g. Ethernet header edits\\nat ingress), use skb_cow() to COW the headroom instead. Guard\\noffset_valid() against INT_MIN, where negation is undefined.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.94\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.36\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0.13\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.244\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.4.195\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.10.117\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.15.41\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.17.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-06-28T06:36:22.892Z\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-46331\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-29T14:06:32.936055Z\"}}}], \"references\": [{\"url\": \"https://github.com/sgkdev/packet_edit_meme/tree/main\", \"tags\": [\"exploit\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-190\", \"description\": \"CWE-190 Integer Overflow or Wraparound\"}]}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2026-06-29T14:06:24.170Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-46331\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-28T06:36:22.892Z\", \"dateReserved\": \"2026-05-13T15:03:33.112Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-06-16T06:26:21.066Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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

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.