DEBIAN-CVE-2020-12826
Record from OSV · Published May 12, 2020
A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:14 | 5.6.7-1 |
| linux | Debian:12 | 5.6.7-1 |
| linux | Debian:13 | 5.6.7-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 0 |
| Debian:12 | linux | 0 |
| Debian:13 | linux | 0 |
Timeline
- May 12, 2020 CVE Published
- Oct 26, 2026 CVE Updated
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