CVE-2025-54764
published 2025-10-20CVE-2025-54764: Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.
PriorityP425medium6.2CVSS 3.1
AVLACLPRNUINSUCHINAN
EPSS
0.20%
10.2th percentile
Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| arm | mbed_tls | < 3.6.5 | 3.6.5 |
| debian | mbedtls | < mbedtls 3.6.5-0.1 (forky) | mbedtls 3.6.5-0.1 (forky) |
| mbed | mbedtls | >= 0 < 3.6.5-0.1~deb13u1 | 3.6.5-0.1~deb13u1 |
| mbed | mbedtls | >= 0 < 3.6.5-0.1 | 3.6.5-0.1 |
CVSS provenance
nvdv3.16.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
osv6.2MEDIUM
vendor_debian6.2MEDIUM
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GHSA
GHSA-6237-9hpw-gcm6: Mbed TLS before 3
ghsa_unreviewed·2025-10-21
CVE-2025-54764 [MEDIUM] CWE-208 GHSA-6237-9hpw-gcm6: Mbed TLS before 3
Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.
OSV
CVE-2025-54764: Mbed TLS before 3
osv·2025-10-20·CVSS 6.2
CVE-2025-54764 [MEDIUM] CVE-2025-54764: Mbed TLS before 3
Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.
Debian
CVE-2025-54764: mbedtls - Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operation...
vendor_debian·2025·CVSS 6.2
CVE-2025-54764 [MEDIUM] CVE-2025-54764: mbedtls - Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operation...
Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 3.6.5-0.1)
sid: resolved (fixed in 3.6.5-0.1)
trixie: resolved (fixed in 3.6.5-0.1~deb13u1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2025-54764 micropython: Mbedtls timing attacks in RSA operations [fedora-all]
bugzilla·2025-10-20·CVSS 6.2
CVE-2025-54764 [MEDIUM] CVE-2025-54764 micropython: Mbedtls timing attacks in RSA operations [fedora-all]
CVE-2025-54764 micropython: Mbedtls timing attacks in RSA operations [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams
Bugzilla
CVE-2025-54764 rust-psa-crypto-sys: Mbedtls timing attacks in RSA operations [fedora-42]
bugzilla·2025-10-20·CVSS 6.2
CVE-2025-54764 [MEDIUM] CVE-2025-54764 rust-psa-crypto-sys: Mbedtls timing attacks in RSA operations [fedora-42]
CVE-2025-54764 rust-psa-crypto-sys: Mbedtls timing attacks in RSA operations [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug
Bugzilla
CVE-2025-54764 dolphin-emu: Mbedtls timing attacks in RSA operations [fedora-42]
bugzilla·2025-10-20·CVSS 6.2
CVE-2025-54764 [MEDIUM] CVE-2025-54764 dolphin-emu: Mbedtls timing attacks in RSA operations [fedora-42]
CVE-2025-54764 dolphin-emu: Mbedtls timing attacks in RSA operations [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports
2025-10-20
Published