CVE-2023-52462
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2023-52462
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2023-52462.html
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2024:9315
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 6.1.76-1 |
| debian | bullseye | fixed | 5.10.209-1 |
| debian | forky | fixed | 6.6.15-1 |
| debian | sid | fixed | 6.6.15-1 |
| debian | trixie | fixed | 6.6.15-1 |
References
Verify integrity in audit chain (admin only). AS-IS.