Public proof of conceptFix available

CVE-2022-3564

Q: Is CVE-2022-3564 actively exploited?

Active exploitation of CVE-2022-3564 has not been confirmed. Its EPSS score was 1.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-3564?

CVE-2022-3564 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2022-10-17
Fixed in6.0.8 · 5.15.78 · 5.10.154 · 5.4.224 · 4.19.265 · 4.14.299
WeaknessCWE-119 · CWE-362

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

A vulnerability classified as critical was found in Linux Kernel. Affected by this vulnerability is the function l2cap_reassemble_sdu of the file net/bluetooth/l2cap_core.c of the component Bluetooth. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211087.

Timeline

dates in UTC

2022-10-1719:15CVE publishedNVD
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-2022-3564?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-3564?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

Branch	Affected	Fixed in	Source
6.0	≥ 5.16, < 6.0.8	6.0.8	NVD
5.x	≥ 5.11, < 5.15.78	5.15.78	NVD
5.x	≥ 5.5.0, < 5.10.154	5.10.154	NVD
5.4	≥ 4.20, < 5.4.224	5.4.224	NVD
4.x	≥ 4.15, < 4.19.265	4.19.265	NVD
4.x	≥ 4.10, < 4.14.299	4.14.299	NVD
4.9	≥ 3.6, < 4.9.333	4.9.333	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
10.0	= 10.0	no fix published	NVD

Netapp h300s firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

3 more products in the sources.

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

kernelAlmaLinux:9all versions · fixed in 5.14.0-162.18.1.el9_1and 26 other packages
kernelAlmaLinux:8all versions · fixed in 4.18.0-477.10.1.el8_8and 23 other packages
kernel-rtAlmaLinux:9all versions · fixed in 5.14.0-162.18.1.rt21.181.el9_1and 11 other packages
kernel-rtAlmaLinux:8all versions · fixed in 4.18.0-477.10.1.rt7.274.el8_8and 11 other packages

Full record on NVD

Fix

Update Linux linux kernel to 6.0.8 · 5.15.78 · 5.10.154 · 5.4.224 · 4.19.265 · 4.14.299 · 4.9.333

Advisories and patches

git.kernel.orgPatch

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedTrinadh465/linux-4.1.15_CVE-2022-3564

Sources

CNACVSS 3.15.5read 2026-10-23
NVDCVSS 3.17.1read 2026-10-23
CNAweakness (CWE)CWE-119read 2026-10-23
NVDweakness (CWE)CWE-362read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2022-10-17
Last Modified: 2026-10-14
NVD status: Modified

Frequently asked questions

What is CVE-2022-3564?

Is CVE-2022-3564 actively exploited?

Active exploitation of CVE-2022-3564 has not been confirmed. Its EPSS score was 1.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-3564?

CVE-2022-3564 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

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