Vulnerability-Lookup

OESA-2023-1638 (CVE-2023-4206)

Vulnerability from osv_openeuler – Published: 2023-09-15 11:06 – Updated: 2026-08-06 11:06 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

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

When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.

We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.

(CVE-2023-4206)

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

When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.

We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.

(CVE-2023-4207)

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

When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.

We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.

(CVE-2023-4208)

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.

The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.

We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.

(CVE-2023-4622)

Severity

7.8 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-4206	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-4207	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-4208	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-4622	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bpftool-debuginfo-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "kernel-tools-debuginfo-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "kernel-devel-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "kernel-source-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "kernel-debugsource-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "kernel-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "bpftool-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "python2-perf-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "python3-perf-debuginfo-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "kernel-tools-devel-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
          "python2-perf-debuginfo-4.19.90-2309.3.0.0218.oe1.aarch64.rpm",
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        ],
        "src": [
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        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-20.03-LTS-SP3"
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  "database_specific": {
    "severity": "High"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\r\n\r\nA use-after-free vulnerability in the Linux kernel\u0026apos;s net/sched: cls_route component can be exploited to achieve local privilege escalation.\r\n\r\nWhen route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\r\n\r\nWe recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.\r\n\r\n(CVE-2023-4206)\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\nWhen fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\r\n\r\nWe recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.\r\n\r\n(CVE-2023-4207)\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\nWhen u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\r\n\r\nWe recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.\r\n\r\n(CVE-2023-4208)\r\n\r\nA use-after-free vulnerability in the Linux kernel\u0026apos;s af_unix component can be exploited to achieve local privilege escalation.\r\n\r\nThe unix_stream_sendpage() function tries to add data to the last skb in the peer\u0026apos;s recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.\r\n\r\nWe recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.\r\n\r\n(CVE-2023-4622)",
  "id": "OESA-2023-1638",
  "modified": "2026-08-06T11:06:05Z",
  "published": "2023-09-15T11:06:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1638"
    },
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4206"
    },
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4207"
    },
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4208"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4622"
    }
  ],
  "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-2023-4206",
    "CVE-2023-4207",
    "CVE-2023-4208",
    "CVE-2023-4622"
  ]
}

CVE-2023-4206 (GCVE-0-2023-4206)

Vulnerability from cvelistv5 – Published: 2023-09-06 13:53 – Updated: 2025-02-13 17:09

Title

Use-after-free in Linux kernel's net/sched: cls_route component

Summary

A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to achieve local privilege escalation. When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

Google Google root

References

4 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t…	patch
https://kernel.dance/b80b829e9e2c1b3f7aae34855e04…
https://www.debian.org/security/2023/dsa-5492
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

1 product

Vendor	Product	Version
Linux	Kernel	Affected: 3.18 , < 6.5 (custom)

Date Public

2023-08-01 03:10

Credits

valis Bing-Jhong Billy Jheng

Show details on NVD website

JSON

To clipboard

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CVE-2023-4207 (GCVE-0-2023-4207)

Vulnerability from cvelistv5 – Published: 2023-09-06 13:53 – Updated: 2025-02-13 17:09

Title

Use-after-free in Linux kernel's net/sched: cls_fw component

Summary

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

Google Google root

References

4 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t…	patch
https://kernel.dance/76e42ae831991c828cffa8c37736…
https://www.debian.org/security/2023/dsa-5492
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

1 product

Vendor	Product	Version
Linux	Kernel	Affected: 3.18 , < 6.5 (custom)

Date Public

2023-08-01 03:10

Credits

valis Bing-Jhong Billy Jheng

Show details on NVD website

JSON

To clipboard

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CVE-2023-4208 (GCVE-0-2023-4208)

Vulnerability from cvelistv5 – Published: 2023-09-06 13:53 – Updated: 2025-02-13 17:09

Title

Use-after-free in Linux kernel's net/sched: cls_u32 component

Summary

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

Google Google root

References

4 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t…	patch
https://kernel.dance/3044b16e7c6fe5d24b1cdbcf1bd0…
https://www.debian.org/security/2023/dsa-5492
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

1 product

Vendor	Product	Version
Linux	Kernel	Affected: 3.18 , < 6.5 (custom)

Date Public

2023-08-01 03:10

Credits

valis Muhammad Alifa Ramdhan of STAR Labs

Show details on NVD website

JSON

To clipboard

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CVE-2023-4622 (GCVE-0-2023-4622)

Vulnerability from cvelistv5 – Published: 2023-09-06 13:56 – Updated: 2026-09-17 19:26

Title

Use-after-free in Linux kernel's af_unix component

Summary

A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c (or backported equivalents).

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

Google Google root

References

7 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/t…	patch
https://git.kernel.org/pub/scm/linux/kernel/git/s…	patch
https://kernel.dance/790c2f9d15b594350ae9bca7b236…
https://www.debian.org/security/2023/dsa-5492
https://lists.debian.org/debian-lts-announce/2023…
http://packetstormsecurity.com/files/175963/Kerne…
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

1 product

Vendor	Product	Version
Linux	Kernel	Affected: 4.2 , < 4.14.324 (custom) Affected: 4.15 , < 4.19.293 (custom) Affected: 4.20 , < 5.4.255 (custom) Affected: 5.5 , < 5.10.192 (custom) Affected: 5.11 , < 5.15.128 (custom) Affected: 5.16 , < 6.1.47 (custom) Affected: 6.2 , < 6.4.12 (custom) Unaffected: 6.5 (custom)

Date Public

2023-08-23 15:52

Credits

Billy Jheng Bing-Jhong

Show details on NVD website

JSON

To clipboard

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

OESA-2023-1638 (CVE-2023-4206)

CVE-2023-4206 (GCVE-0-2023-4206)

CVE-2023-4207 (GCVE-0-2023-4207)

CVE-2023-4208 (GCVE-0-2023-4208)

CVE-2023-4622 (GCVE-0-2023-4622)

Tags

Sightings

Nomenclature

Related by attack behaviour