CVE-2026-43823
High
Description
When initializing an RSA public key from DER or PEM bytes throws an error, the EVP_PKEY* is double-freed: first in the catch block, then in the deinit. This can lead to a crash on future memory allocations. This double-free manifests when BoringSSL cannot decode the public key from the bytes provided. This vulnerability is addressed in swift-crypto version 4.5.1.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apple Swift-crypto
PublishedJul 23, 2026
First seenJul 23, 2026
Weakness typeCWE-415CWE-415
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple swift-crypto | 3.2.0 ≤ v ≤ 4.5.1 | — |
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