CVE-2023-4921
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- CVE-2023-4921
CVE Details
| Release Date: | 2023-09-05 |
Description
A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue(). We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.
See more information about CVE-2023-4921 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 7.8 | Base Metrics: | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | Low | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | High |
| Integrity Impact: | High | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 6 (kernel) | ELSA-2024-1831 | 2024-04-22 |
| Oracle Linux version 6 (kernel-uek) | ELSA-2024-12110 | 2024-02-01 |
| Oracle Linux version 7 (kernel) | ELSA-2024-1249 | 2024-03-20 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2024-12110 | 2024-02-01 |
| Oracle Linux version 8 (kernel) | ELSA-2024-0897 | 2024-03-06 |
| Oracle Linux version 8 (kernel) | ELSA-2024-12169 | 2024-02-22 |
| Oracle Linux version 8 (kernel-uek) | ELSA-2023-13043 | 2023-12-13 |
| Oracle Linux version 9 (kernel-uek) | ELSA-2023-13043 | 2023-12-13 |
| Oracle VM version 3 (kernel-uek) | OVMSA-2024-0002 | 2024-03-01 |
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