alsa-lib through 1.2.16.1 computes combined topology element size using 32-bit arithmetic in src/topology/ctl.c, allowing integer overflow that defeats bounds checks. Attackers can supply crafted topology files that wrap size calculations, causing the decoder to read beyond the topology buffer and potentially leak sensitive data or crash the application.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/alsa-project/alsa-lib
disclosure@vulncheck.com
https://github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c#L131…
disclosure@vulncheck.com
https://github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c#L142…
disclosure@vulncheck.com
https://github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c#L151…
disclosure@vulncheck.com
https://github.com/alsa-project/alsa-lib/pull/527
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/alsa-lib-through-1.2.16.1-integer-overflow…
disclosure@vulncheck.com