CVE-2026-46333 (GCVE-0-2026-46333)

Vulnerability from cvelistv5 – Published: 2026-05-15 12:58 – Updated: 2026-06-14 18:09
VLAI
Title
ptrace: slightly saner 'get_dumpable()' logic
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.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6 (git)
Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 15b828a46f305ae9f05a7c16914b3ce273474205 (git)
Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 4709234fd1b95136ceb789f639b1e7ea5de1b181 (git)
Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 8f907d345bae8f4b3f004c5abc56bf2dfb851ea7 (git)
Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d (git)
Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 2a93a4fac7b6051d3be7cd1b015fe7320cd0404d (git)
Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 01363cb3fbd0238ffdeb09f53e9039c9edf8a730 (git)
Affected: bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 , < 31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a (git)
Affected: d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12 (git)
Affected: 03eed7afbc09e061f66b448daf7863174c3dc3f3 (git)
Affected: e45692fa1aea06676449b63ef3c2b6e1e72b7578 (git)
Affected: 694a95fa6dae4991f16cda333d897ea063021fed (git)
Affected: 3.16.52 , < 3.17 (semver)
Affected: 4.4.40 , < 4.5 (semver)
Affected: 4.8.16 , < 4.9 (semver)
Affected: 4.9.1 , < 4.10 (semver)
Create a notification for this product.
Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 5.10.256 , ≤ 5.10.* (semver)
Unaffected: 5.15.207 , ≤ 5.15.* (semver)
Unaffected: 6.1.173 , ≤ 6.1.* (semver)
Unaffected: 6.6.139 , ≤ 6.6.* (semver)
Unaffected: 6.12.89 , ≤ 6.12.* (semver)
Unaffected: 6.18.31 , ≤ 6.18.* (semver)
Unaffected: 7.0.8 , ≤ 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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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46333\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-15T14:16:35.793\",\"lastModified\":\"2026-05-21T14:16:48.910\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-269\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/15b828a46f305ae9f05a7c16914b3ce273474205\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4709234fd1b95136ceb789f639b1e7ea5de1b181\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8f907d345bae8f4b3f004c5abc56bf2dfb851ea7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/05/15/9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/05/20/14\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/05/20/16\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2026/05/msg00032.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2026/05/msg00035.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/0xdeadbeefnetwork/ssh-keysign-pwn/\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\"}]}}",
    "vulnrichment": {
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\"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\": 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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\": \"2026-06-14T18:09:28.322Z\", \"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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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.