CVE-2024-27431
Last modified
CVE-2024-27431 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: cpumap: Zero-initialise xdp_rxq_info struct before running XDP program When running an XDP program that is attached to a cpumap entry, we don't initialise the xdp_rxq_info data structure being used in the xdp_buff that backs the XDP program invocation. Tobias noticed that this leads to random values being returned as the xdp_md->rx_queue_index value for XDP programs running in a cpumap. This means we're basically returning the contents of the uninitialised memory, which is bad. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: cpumap: Zero-initialise xdp_rxq_info struct before running XDP program When running an XDP program that is attached to a cpumap entry, we don't initialise the xdp_rxq_info data structure being used in the xdp_buff that backs the XDP program invocation. Tobias noticed that this leads to random values being returned as the xdp_md->rx_queue_index value for XDP programs running in a cpumap. This means we're basically returning the contents of the uninitialised memory, which is bad. Fix this by zero-initialising the rxq data structure before running the XDP program.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 5.9, < 5.10.213 | — |
| Linux | Linux Kernel | >= 5.11, < 5.15.152 | — |
| Linux | Linux Kernel | >= 5.16, < 6.1.82 | — |
| Linux | Linux Kernel | >= 6.2, < 6.6.22 | — |
| Linux | Linux Kernel | >= 6.7, < 6.7.10 | — |
| Linux | Linux Kernel | 6.8 | Rc1 |
| Debian | Debian Linux | 10.0 | — |
References
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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