CVE-2026-46333 (GCVE-0-2026-46333)
Vulnerability from cvelistv5
Published
2026-05-15 12:58
Modified
2026-08-24 12:06
Summary
In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.
Impacted products
Vendor Product Version
Linux Linux Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4
Version: d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12
Version: 03eed7afbc09e061f66b448daf7863174c3dc3f3
Version: e45692fa1aea06676449b63ef3c2b6e1e72b7578
Version: 694a95fa6dae4991f16cda333d897ea063021fed
Version: 3.16.52   
Version: 4.4.40   
Version: 4.8.16   
Version: 4.9.1   
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\"content\": {\"id\": \"CVE-2026-46333\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-21T12:57:16.275566Z\"}}}], \"references\": [{\"url\": \"https://github.com/0xdeadbeefnetwork/ssh-keysign-pwn/\", \"tags\": [\"exploit\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-269\", \"description\": \"CWE-269 Improper Privilege Management\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-18T12:53:39.616Z\"}}], \"cna\": {\"title\": \"ptrace: slightly saner \u0027get_dumpable()\u0027 logic\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.1, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N\"}}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"15b828a46f305ae9f05a7c16914b3ce273474205\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"4709234fd1b95136ceb789f639b1e7ea5de1b181\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"8f907d345bae8f4b3f004c5abc56bf2dfb851ea7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"2a93a4fac7b6051d3be7cd1b015fe7320cd0404d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"01363cb3fbd0238ffdeb09f53e9039c9edf8a730\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4\", \"lessThan\": \"31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"03eed7afbc09e061f66b448daf7863174c3dc3f3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e45692fa1aea06676449b63ef3c2b6e1e72b7578\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"694a95fa6dae4991f16cda333d897ea063021fed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3.16.52\", \"lessThan\": \"3.17\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.4.40\", \"lessThan\": \"4.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.8.16\", \"lessThan\": \"4.9\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.9.1\", \"lessThan\": \"4.10\", \"versionType\": \"semver\"}], \"programFiles\": [\"include/linux/sched.h\", \"kernel/exit.c\", \"kernel/ptrace.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.256\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.207\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.173\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.139\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.89\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.31\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"7.0.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.0.*\"}, {\"status\": \"unaffected\", \"version\": \"7.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/linux/sched.h\", \"kernel/exit.c\", \"kernel/ptrace.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6\"}, {\"url\": \"https://git.kernel.org/stable/c/15b828a46f305ae9f05a7c16914b3ce273474205\"}, {\"url\": \"https://git.kernel.org/stable/c/4709234fd1b95136ceb789f639b1e7ea5de1b181\"}, {\"url\": \"https://git.kernel.org/stable/c/8f907d345bae8f4b3f004c5abc56bf2dfb851ea7\"}, {\"url\": \"https://git.kernel.org/stable/c/6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d\"}, {\"url\": \"https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d\"}, {\"url\": \"https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730\"}, {\"url\": \"https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nptrace: slightly saner \u0027get_dumpable()\u0027 logic\\n\\nThe \u0027dumpability\u0027 of a task is fundamentally about the memory image of\\nthe task - the concept comes from whether it can core dump or not - and\\nmakes no sense when you don\u0027t have an associated mm.\\n\\nAnd almost all users do in fact use it only for the case where the task\\nhas a mm pointer.\\n\\nBut we have one odd special case: ptrace_may_access() uses \u0027dumpable\u0027 to\\ncheck various other things entirely independently of the MM (typically\\nexplicitly using flags like PTRACE_MODE_READ_FSCREDS).  Including for\\nthreads that no longer have a VM (and maybe never did, like most kernel\\nthreads).\\n\\nIt\u0027s not what this flag was designed for, but it is what it is.\\n\\nThe ptrace code does check that the uid/gid matches, so you do have to\\nbe uid-0 to see kernel thread details, but this means that the\\ntraditional \\\"drop capabilities\\\" model doesn\u0027t make any difference for\\nthis all.\\n\\nMake it all make a *bit* more sense by saying that if you don\u0027t have a\\nMM pointer, we\u0027ll use a cached \\\"last dumpability\\\" flag if the thread\\never had a MM (it will be zero for kernel threads since it is never\\nset), and require a proper CAP_SYS_PTRACE capability to override.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.256\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.207\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.173\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.139\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.89\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.31\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0.8\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1\", \"versionStartIncluding\": \"4.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.16.52\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.4.40\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.8.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.9.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-06-14T18:09:28.322Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-46333\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-14T12:49:20.494Z\", \"dateReserved\": \"2026-05-13T15:03:33.113Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-05-15T12:58:44.599Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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