Description
Crypto++ through 8.4 contains a timing side channel in ECDSA signature generation. Function FixedSizeAllocatorWithCleanup could write to memory outside of the allocation if the allocated memory was not 16-byte aligned. NOTE: this issue exists because the CVE-2019-14318 fix was intentionally removed for functionality reasons.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libcrypto++ | No fix yet | — |
| Debian 13 | libcrypto++ | No fix yet | — |
| Debian 12 | libcrypto++ | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libcrypto++ | No fix yet | — |
| Ubuntu 26.04 LTS | libcrypto++ | No fix yet | — |
| Ubuntu 25.10 | libcrypto++ | No fix yet | — |
| Ubuntu 24.04 LTS | libcrypto++ | No fix yet | — |
| Ubuntu 22.04 LTS | libcrypto++ | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libcrypto++ | No fix yet | — |
| Ubuntu 18.04 LTS | libcrypto++ | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libcrypto++ | No fix yet | — |
| Ubuntu Pro 14.04 LTS | libcrypto++ | No fix yet | — |