# CVE-2024-0565: Kernel: cifs filesystem decryption improper input validation remote code execution vulnerability in function receive_encrypted_standard of client

Status: published. Published: 2024-01-15. Updated: 2026-11-05.

An out-of-bounds memory read flaw was found in receive_encrypted_standard in fs/smb/client/smb2ops.c in the SMB Client sub-component in the Linux Kernel. This issue occurs due to integer underflow on the memcpy length, leading to a denial of service.

## Remediation

- workaround: To mitigate this issue, prevent module cifs from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. (source: CNA: redhat)

## Affected products and versions

- Linux / kernel (kernel): ≥ 4.19; < 5.10.211 (affected, semver); ≥ 5.11; < 5.15.150 (affected, semver); ≥ 5.16; < 6.1.69 (affected, semver); ≥ 6.2; < 6.6.8 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (kernel-rt): ≥ 0:4.18.0-513.24.1.rt7.326.el8_9; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (kernel): ≥ 0:4.18.0-513.24.1.el8_9; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support (kernel): ≥ 0:4.18.0-372.95.1.el8_6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support (kernel): ≥ 0:4.18.0-477.51.1.el8_8; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (kernel): ≥ 0:5.14.0-427.13.1.el9_4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support (kernel): ≥ 0:5.14.0-284.59.1.el9_2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support (kernel-rt): ≥ 0:5.14.0-284.59.1.rt14.344.el9_2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 (kernel): ≥ 0:4.18.0-372.95.1.el8_6; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/cluster-logging-operator-bundle): ≥ v5.7.13-16; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/cluster-logging-rhel8-operator): ≥ v5.7.13-7; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/elasticsearch6-rhel8): ≥ v6.8.1-408; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/elasticsearch-operator-bundle): ≥ v5.7.13-19; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/elasticsearch-proxy-rhel8): ≥ v1.0.0-480; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/elasticsearch-rhel8-operator): ≥ v5.7.13-9; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/eventrouter-rhel8): ≥ v0.4.0-248; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/fluentd-rhel8): ≥ v1.14.6-215; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/kibana6-rhel8): ≥ v6.8.1-431; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/log-file-metric-exporter-rhel8): ≥ v1.1.0-228; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/logging-curator5-rhel8): ≥ v5.8.1-471; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/logging-loki-rhel8): ≥ v2.9.6-15; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/logging-view-plugin-rhel8): ≥ v5.7.13-3; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/loki-operator-bundle): ≥ v5.7.13-27; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/loki-rhel8-operator): ≥ v5.7.13-12; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/lokistack-gateway-rhel8): ≥ v0.1.0-527; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/opa-openshift-rhel8): ≥ v0.1.0-225; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / RHOL-5.7-RHEL-8 (openshift-logging/vector-rhel8): ≥ v0.28.1-57; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (kernel): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (kernel): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (kernel-rt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (kernel-rt): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 6.8 (medium); CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 2.00% as of 2026-11-04; percentile 80.79%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-191

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2024:1188 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1404 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1532 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1533 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1607 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:1614 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:2093 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:2394 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2024-0565 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2258518 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://www.spinics.net/lists/stable-commits/msg328851.html (CNA: redhat)

- https://access.redhat.com/errata/RHSA-2024:1188 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:1404 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:1532 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:1533 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:1607 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:1614 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:2093 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:2394 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/security/cve/CVE-2024-0565 (ADP: CVE; vdb-entry, x_refsource_REDHAT, x_transferred)

- https://bugzilla.redhat.com/show_bug.cgi?id=2258518 (ADP: CVE; issue-tracking, x_refsource_REDHAT, x_transferred)

- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html (ADP: CVE; x_transferred)

- https://security.netapp.com/advisory/ntap-20240223-0002/ (ADP: CVE; x_transferred)

- https://www.spinics.net/lists/stable-commits/msg328851.html (ADP: CVE; x_transferred)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2024-0565; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-0565; retrieved 2026-11-05; source updated Not reported

Revision: 9f39d3fb191caa861551c82f5f5d753beeedd44c78ee0d2ef56753d2b06bb717

Canonical: https://y2.dev/cve/CVE-2024-0565

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