CVE-2021-47190 (GCVE-0-2021-47190)

Vulnerability from cvelistv5 – Published: 2024-04-10 18:56 – Updated: 2026-05-11 13:49
VLAI
Title
perf bpf: Avoid memory leak from perf_env__insert_btf()
Summary
In the Linux kernel, the following vulnerability has been resolved: perf bpf: Avoid memory leak from perf_env__insert_btf() perf_env__insert_btf() doesn't insert if a duplicate BTF id is encountered and this causes a memory leak. Modify the function to return a success/error value and then free the memory if insertion didn't happen. v2. Adds a return -1 when the insertion error occurs in perf_env__fetch_btf. This doesn't affect anything as the result is never checked.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3792cb2ff43b1b193136a03ce1336462a827d792 , < 642fc22210a5e59d40b1e4d56d21ec3effd401f2 (git)
Affected: 3792cb2ff43b1b193136a03ce1336462a827d792 , < 11589d3144bc4e272e0aae46ce8156162e99babc (git)
Affected: 3792cb2ff43b1b193136a03ce1336462a827d792 , < ab7c3d8d81c511ddfb27823fb07081c96422b56e (git)
Affected: 3792cb2ff43b1b193136a03ce1336462a827d792 , < 4924b1f7c46711762fd0e65c135ccfbcfd6ded1f (git)
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Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.162 , ≤ 5.4.* (semver)
Unaffected: 5.10.82 , ≤ 5.10.* (semver)
Unaffected: 5.15.5 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47190.json",
      "version": "20"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.210Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47190\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:50:08.099272Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:17.827Z\"}}], \"cna\": {\"title\": \"perf bpf: Avoid memory leak from perf_env__insert_btf()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3792cb2ff43b1b193136a03ce1336462a827d792\", \"lessThan\": \"642fc22210a5e59d40b1e4d56d21ec3effd401f2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3792cb2ff43b1b193136a03ce1336462a827d792\", \"lessThan\": \"11589d3144bc4e272e0aae46ce8156162e99babc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3792cb2ff43b1b193136a03ce1336462a827d792\", \"lessThan\": \"ab7c3d8d81c511ddfb27823fb07081c96422b56e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3792cb2ff43b1b193136a03ce1336462a827d792\", \"lessThan\": \"4924b1f7c46711762fd0e65c135ccfbcfd6ded1f\", \"versionType\": \"git\"}], \"programFiles\": [\"tools/perf/util/bpf-event.c\", \"tools/perf/util/env.c\", \"tools/perf/util/env.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.162\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.82\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"tools/perf/util/bpf-event.c\", \"tools/perf/util/env.c\", \"tools/perf/util/env.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2\"}, {\"url\": \"https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc\"}, {\"url\": \"https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e\"}, {\"url\": \"https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nperf bpf: Avoid memory leak from perf_env__insert_btf()\\n\\nperf_env__insert_btf() doesn\u0027t insert if a duplicate BTF id is\\nencountered and this causes a memory leak. Modify the function to return\\na success/error value and then free the memory if insertion didn\u0027t\\nhappen.\\n\\nv2. Adds a return -1 when the insertion error occurs in\\n    perf_env__fetch_btf. This doesn\u0027t affect anything as the result is\\n    never checked.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.162\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.82\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.5\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"5.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T13:49:43.257Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47190\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T13:49:43.257Z\", \"dateReserved\": \"2024-03-25T09:12:14.113Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-10T18:56:28.815Z\", \"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.