CVE-2023-40283

Aliases:UBUNTU-CVE-2023-40283DEBIAN-CVE-2023-40283
Advisory lineage Upstream: 0 Downstream: 47
Modified
Published: 14 Aug 2023, 00:00
Last modified:18 Sept 2026, 15:06

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.55% LOW
1% probability +0.54%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

14 Aug 2023, 00:00
Published
Vulnerability first disclosed
18 Sept 2026, 15:06
Last Modified
Vulnerability information updated

Description

An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before 6.4.10. There is a use-after-free because the children of an sk are mishandled.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.55%• Percentile: 45%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 20.04 | 22.04

  • debian•linux

    < 5.10.191-1 | < 6.1.52-1 | < 6.4.11-1 | < 6.4.11-1

  • ubuntu•linux

    all | < 4.4.0-245.279 | < 4.15.0-218.229 | < 5.4.0-163.180 | < 5.15.0-84.93

  • ubuntu•linux-allwinner-5.19

    all

  • ubuntu•linux-aws

    < 4.4.0-1123.129 | < 4.4.0-1161.176 | < 4.15.0-1161.174 | < 5.4.0-1110.119 | < 5.15.0-1045.50

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.15

    < 5.15.0-1045.50~20.04.1

  • ubuntu•linux-aws-5.19

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1110.119~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.2

    < 6.2.0-1012.12~22.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2100.106 | all | < 5.4.0-1110.119+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1161.174~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1170.185~14.04.1 | < 4.15.0-1170.185~16.04.1 | all | < 5.4.0-1116.123 | < 5.15.0-1047.54

  • ubuntu•linux-azure-4.15

    < 4.15.0-1170.185

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.15

    < 5.15.0-1047.54~20.04.1

  • ubuntu•linux-azure-5.19

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1116.123~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.2

    < 6.2.0-1012.12~22.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all | < 5.15.0-1047.54.1

  • ubuntu•linux-azure-fde-5.19

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2079.85 | all | < 5.4.0-1116.123+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1071.77 | < 5.15.0-1024.26

  • ubuntu•linux-fips

    < 4.4.0-1093.100 | all | < 4.15.0-1116.127 | < 5.4.0-1085.94

  • ubuntu•linux-gcp

    < 4.15.0-1155.172~16.04.1 | all | < 5.4.0-1113.122 | < 5.15.0-1042.50

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1155.172

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.15

    < 5.15.0-1042.50~20.04.1

  • ubuntu•linux-gcp-5.19

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1113.122~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-6.2

    < 6.2.0-1014.14~22.04.1

  • ubuntu•linux-gcp-fips

    < 4.15.0-2063.68 | all | < 5.4.0-1113.122+fips1

  • ubuntu•linux-gke

    all | < 5.15.0-1042.47

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.15

    all

  • ubuntu•linux-gke-5.4

    all

  • ubuntu•linux-gkeop

    < 5.4.0-1077.81 | < 5.15.0-1028.33

  • ubuntu•linux-gkeop-5.15

    < 5.15.0-1028.33~20.04.1

  • ubuntu•linux-gkeop-5.4

    all

Showing first 50 affected entries in server-rendered view.

References (27)