CVE-2021-33909 (GCVE-0-2021-33909)

Vulnerability from cvelistv5 – Published: 2021-07-20 18:01 – Updated: 2024-08-04 00:05
VLAI
Summary
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
URL Tags
https://lists.debian.org/debian-lts-announce/2021… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021… mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4941 vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://www.openwall.com/lists/oss-security/2021/07/22/7 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/0… mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/2 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/4 mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/21/1 mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpujan2022.html x_refsource_MISC
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https://github.com/torvalds/linux/commit/8cae8cd8… x_refsource_CONFIRM
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan… x_refsource_CONFIRM
http://packetstormsecurity.com/files/163621/Sequo… x_refsource_MISC
http://packetstormsecurity.com/files/163671/Kerne… x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021081… x_refsource_CONFIRM
http://packetstormsecurity.com/files/164155/Kerne… x_refsource_MISC
http://packetstormsecurity.com/files/165477/Kerne… x_refsource_MISC
https://psirt.global.sonicwall.com/vuln-detail/SN… x_refsource_CONFIRM
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      "id": "CVE-2021-33909",
      "lastModified": "2024-11-21T06:09:45.353",
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      "published": "2021-07-20T19:15:09.747",
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  }
}


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Tags
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.