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No exploitation reportedFix available

CVE-2023-40283

No exploitation reported by the sources we read.

  • Published2023-08-14
  • Fixed in6.4.10 · 6.1.45 · 5.15.126 · 5.10.190 · 5.4.253 · 4.19.291
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2023-08-1403:15CVE publishedNVD

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
6.x≥ 6.2, < 6.4.106.4.10
6.1≥ 5.16, < 6.1.456.1.45
5.x≥ 5.11, < 5.15.1265.15.126
5.x≥ 5.5, < 5.10.1905.10.190
5.4≥ 4.20, < 5.4.2535.4.253
4.x≥ 4.15, < 4.19.2914.19.291
4.14≥ 3.5, < 4.14.3224.14.322
Canonical ubuntu linux
BranchAffectedFixed in
14.4= 14.04no fix published
16.4= 16.04no fix published
18.4= 18.04no fix published
20.4= 20.04no fix published
22.4= 22.04no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
11.0= 11.0no fix published
12.0= 12.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bpftoolTuxCare:AlmaLinux:9.2all versions · fixed in 7.0.0-284.30.1.el9_2.tuxcare.els2
  • bpftoolRed Hat:rhel_eus:9.2::baseosall versions · fixed in 0:7.0.0-284.48.1.el9_2and 1 other package
  • bpftoolRed Hat:rhel_aus:8.4::baseosall versions · fixed in 0:4.18.0-305.130.1.el8_4
  • bpftoolRed Hat:enterprise_linux:9::baseosall versions · fixed in 0:7.2.0-362.18.1.el9_3and 1 other package
  • bpftool-debuginfoRed Hat:rhel_eus:9.2::crball versions · fixed in 0:7.0.0-284.48.1.el9_2
  • bpftool-debuginfoRed Hat:rhel_eus:9.2::appstreamall versions · fixed in 0:7.0.0-284.48.1.el9_2
  • bpftool-debuginfoRed Hat:enterprise_linux:9::realtimeall versions · fixed in 0:7.2.0-362.18.1.el9_3
  • bpftool-debuginfoRed Hat:enterprise_linux:9::nfvall versions · fixed in 0:7.2.0-362.18.1.el9_3

127 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2024:2582 Red Hat Product Security97 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2024:2585 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2024:1404 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2024:1306 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2024:1269 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security update

  • RHSA-2024:1268 Red Hat Product Security97 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

8 more advisories

Full record on NVD

Fix

  1. Update Linux linux kernel to 6.4.10 · 6.1.45 · 5.15.126 · 5.10.190 · 5.4.253 · 4.19.291 · 4.14.322
  2. Vendor fix Red Hat Product Security RHSA-2024:2582 · 97 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  3. Vendor fix Red Hat Product Security RHSA-2024:1268 · 97 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  4. Vendor fix Siemens ProductCERT SSA-398330 · 1 productUpdate to V3.1.5 or later version
  5. Workaround from the vendor Red Hat Product Security RHSA-2024:2582 · 97 productsMitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-08-14
Last Modified
2026-10-15
NVD status
Modified
GitHub Advisory
GHSA-cp56-rpr6-7673

Frequently asked questions

What is CVE-2023-40283?

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.

Is CVE-2023-40283 actively exploited?

Active exploitation of CVE-2023-40283 has not been confirmed. Its EPSS score was 0.5% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-40283?

CVE-2023-40283 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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