Medium [CVE-2023-3772] Kernel: xfrm: null pointer dereference in xfrm_update_ae_params
This medium-severity Red Hat Linux advisory covers CVE-2023-3772 affecting Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Enterprise Linux 9.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in xfrm_update_ae_params(), leading to a possible kernel crash and denial of service.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-476.
Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 8.8 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2023:6901, RHSA-2023:7077, RHSA-2024:0412, RHSA-2024:0575, RHSA-2023:6583.
Affected products named by the advisory: Red Hat package: kernel-rt.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 10 hours ago·verify at source
- kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9
- kernel-0:4.18.0-513.5.1.el8_9
- kernel-0:4.18.0-372.87.1.el8_6
- kernel-0:4.18.0-477.43.1.el8_8
- kernel-0:5.14.0-362.8.1.el9_3
- RHSA-2023:6901
- RHSA-2023:7077
- RHSA-2024:0412
- RHSA-2024:0575
- RHSA-2023:6583
Official advisory · high-confidence parse· fetched 10 hours ago·verify at source
Mitigation
Upgrade to a fixed release: kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9, kernel-0:4.18.0-513.5.1.el8_9, kernel-0:4.18.0-372.87.1.el8_6, kernel-0:4.18.0-477.43.1.el8_8, kernel-0:5.14.0-362.8.1.el9_3, RHSA-2023:6901. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 10 hours ago·verify at source
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