GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

OESA-2023-1470 (CVE-2023-21255)

Vulnerability from osv_openeuler – Published: 2023-08-06 11:05 – Updated: 2026-08-06 11:05 – Source website
VLAI
Summary
kernel security update
Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

In multiple functions of binder.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

(CVE-2023-21255)

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.

If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.

We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.

(CVE-2023-3609)

An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation.

The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks.

We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.

(CVE-2023-3611)

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.

If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.

We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.

(CVE-2023-3776)

An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.(CVE-2023-3812)

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bpftool-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "perf-debuginfo-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "python2-perf-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-devel-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "python3-perf-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-debugsource-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "python2-perf-debuginfo-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-debuginfo-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-source-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-tools-debuginfo-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "perf-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "python3-perf-debuginfo-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "bpftool-debuginfo-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-tools-devel-4.19.90-2308.1.0.0212.oe1.aarch64.rpm",
          "kernel-tools-4.19.90-2308.1.0.0212.oe1.aarch64.rpm"
        ],
        "src": [
          "kernel-4.19.90-2308.1.0.0212.oe1.src.rpm"
        ],
        "x86_64": [
          "perf-debuginfo-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-tools-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "python2-perf-debuginfo-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "perf-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-devel-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "bpftool-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "python2-perf-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-tools-debuginfo-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "python3-perf-debuginfo-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "bpftool-debuginfo-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-debuginfo-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-source-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-tools-devel-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "kernel-debugsource-4.19.90-2308.1.0.0212.oe1.x86_64.rpm",
          "python3-perf-4.19.90-2308.1.0.0212.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.19.90-2308.1.0.0212.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\r\n\r\nIn multiple functions of binder.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.\r\n\r\n(CVE-2023-21255)\r\n\r\nA use-after-free vulnerability in the Linux kernel\u0026apos;s net/sched: cls_u32 component can be exploited to achieve local privilege escalation.\r\n\r\nIf tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\r\n\r\nWe recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.\r\n\r\n(CVE-2023-3609)\r\n\r\nAn out-of-bounds write vulnerability in the Linux kernel\u0026apos;s net/sched: sch_qfq component can be exploited to achieve local privilege escalation.\r\n\r\nThe qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks.\r\n\r\nWe recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.\r\n\r\n(CVE-2023-3611)\r\n\r\nA use-after-free vulnerability in the Linux kernel\u0026apos;s net/sched: cls_fw component can be exploited to achieve local privilege escalation.\r\n\r\nIf tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\r\n\r\nWe recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.\r\n\r\n(CVE-2023-3776)\r\n\r\nAn out-of-bounds memory access flaw was found in the Linux kernel\u2019s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.(CVE-2023-3812)",
  "id": "OESA-2023-1470",
  "modified": "2026-08-06T11:05:55Z",
  "published": "2023-08-06T11:05:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1470"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-21255"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3609"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3611"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3776"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3812"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2023-21255",
    "CVE-2023-3609",
    "CVE-2023-3611",
    "CVE-2023-3776",
    "CVE-2023-3812"
  ]
}



Log in or create an account to share your comment.




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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.