CVE-2020-9391
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
Description
An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It ignores the top byte in the address passed to the brk system call, potentially moving the memory break downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to cause heap corruption with the GNU C Library malloc implementation.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-9391
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-9391.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 5.5.13-1 |
| debian | bullseye | fixed | 5.5.13-1 |
| debian | forky | fixed | 5.5.13-1 |
| debian | sid | fixed | 5.5.13-1 |
| debian | trixie | fixed | 5.5.13-1 |
References
Verify integrity in audit chain (admin only). AS-IS.