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Public proof of conceptFix available

CVE-2022-42896

A public proof of concept exists; no exploitation attested.

  • Published2022-11-23
  • Fixed in6.0.8 · 5.15.78 · 5.10.154 · 5.4.226 · 4.19.268 · 4.14.301
  • 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

There are use-after-free vulnerabilities in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_connect and l2cap_le_connect_req functions which may allow code execution and leaking kernel memory (respectively) remotely via Bluetooth. A remote attacker could execute code leaking kernel memory via Bluetooth if within proximity of the victim. We recommend upgrading past commit  https://www.google.com/url https://github.com/torvalds/linux/commit/711f8c3fb3db61897080468586b970c87c61d9e4 https://www.google.com/url

Timeline

dates in UTC
  1. 2022-11-2315:15CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-42896?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-42896?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
6.0≥ 5.16, < 6.0.86.0.8
5.x≥ 5.11, < 5.15.785.15.78
5.x≥ 5.5, < 5.10.1545.10.154
5.4≥ 4.20, < 5.4.2265.4.226
4.x≥ 4.15, < 4.19.2684.19.268
4.x≥ 4.10, < 4.14.3014.14.301
4.9< 4.9.3354.9.335

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

  • bpftoolAlmaLinux:9all versions · fixed in 7.0.0-284.11.1.el9_2
  • kernelAlmaLinux:9all versions · fixed in 5.14.0-284.11.1.el9_2and 45 other packages
  • kernelAlmaLinux:8all versions · fixed in 4.18.0-477.21.1.el8_8and 23 other packages
  • kernel-rtAlmaLinux:9all versions · fixed in 5.14.0-284.11.1.rt14.296.el9_2and 13 other packages
  • kernel-rtAlmaLinux:8all versions · fixed in 4.18.0-477.21.1.rt7.284.el8_8and 11 other packages

Full record on NVD

Fix

  1. Update Linux linux kernel to 6.0.8 · 5.15.78 · 5.10.154 · 5.4.226 · 4.19.268 · 4.14.301 · 4.9.335

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
2 repositories, unverifiedSatheesh575555/linux-4.19.72_CVE-2022-42896Trinadh465/linux-4.19.72_CVE-2022-42896
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2025-04-21
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.18read 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • CNAweakness (CWE)CWE-416read 2026-10-23
  • NVDweakness (CWE)CWE-416read 2026-10-23
  • FIRST EPSSEPSS score2.5 %2026-10-23
  • PoC-in-GitHubproof of concept2read 2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-11-23
Last Modified
2026-10-14
NVD status
Modified

Frequently asked questions

What is CVE-2022-42896?

There are use-after-free vulnerabilities in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_connect and l2cap_le_connect_req functions which may allow code execution and leaking kernel memory (respectively) remotely via Bluetooth. A remote attacker could execute code leaking kernel memory via Bluetooth if within proximity of the victim. We recommend upgrading past commit  https://www.google.com/url https://github.com/torvalds/linux/commit/711f8c3fb3db61897080468586b970c87c61d9e4 https://www.google.com/url

Is CVE-2022-42896 actively exploited?

Active exploitation of CVE-2022-42896 has not been confirmed. Its EPSS score was 2.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-42896?

CVE-2022-42896 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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