CVE-2023-53107
Description
A use-after-free vulnerability has been identified within the veth_convert_skb_to_xdp_buff() function of the Linux kernel's veth driver. The flaw stems from improper memory management during packet headroom expansion for XDP (eXpress Data Path). Specifically, when the pskb_expand_head() function allocates new memory via kmalloc to increase the packet headroom to meet the XDP_PACKET_HEADROOM requirement, a subsequent call to consume_skb() can prematurely free this memory while the AF_XDP subsystem is still actively processing the packet. This premature deallocation leads to a use-after-free condition. Successful exploitation of this vulnerability could result in memory corruption, denial of service, and overall system instability.
Statement
v
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7 | 7.8 | 7.8 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | High | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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