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CVE-2026-121506

Medium priority
Needs evaluation

An out-of-bounds read and write in NTS client extension field parsing (extens_client_recv) in NTPsec before 1.2.5 allows a remote attacker who can send NTP server-mode replies to an NTS client to corrupt heap memory and crash...

1 affected package

ntpsec

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ntpsec Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-121505

Medium priority
Needs evaluation

An out-of-bounds read in the NTS-KE client response parser (nts_client_process_response_core) in NTPsec before 1.2.4 allows a malicious NTS-KE server to read the client's stack memory, including pointers that defeat ASLR, which...

1 affected package

ntpsec

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ntpsec Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-102486

Medium priority
Needs evaluation

Out-of-bounds read in NTS extension field parsing in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to crash the daemon via an NTS Authenticator and Encrypted Extension Fields (AEEF) field with an oversized nonce length.

1 affected package

ntpsec

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ntpsec Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-102485

Medium priority
Needs evaluation

Out-of-bounds read in the Motorola Oncore refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the GPS receiver's serial data to crash ntpd or disclose memory via a PPS Control (@@Gc) reply with...

1 affected package

ntpsec

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ntpsec Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-102484

Medium priority
Needs evaluation

Heap-based buffer overflow in the JJY refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the Telephone JJY time source to corrupt memory or crash ntpd via more than six time replies.

1 affected package

ntpsec

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ntpsec Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-102483

Medium priority
Needs evaluation

Reachable exit in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to terminate the daemon via an NTS request with excess NTS Cookie Placeholder extension fields.

1 affected package

ntpsec

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ntpsec Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-18321

Medium priority
Needs evaluation

Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd

1 affected package

ntpsec

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
ntpsec Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-26076

Medium priority
Needs evaluation

ntpd-rs is a full-featured implementation of the Network Time Protocol. Prior to 1.7.1, an attacker can remotely induce moderate increases (2-4 times above normal) in cpu usage. When having NTS enabled on an ntpd-rs server, an...

1 affected package

rust-ntpd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
rust-ntpd Needs evaluation Needs evaluation Not in release — —
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CVE-2025-58066

Medium priority
Needs evaluation

nptd-rs is a tool for synchronizing your computer's clock, implementing the NTP and NTS protocols. In versions between 1.2.0 and 1.6.1 inclusive servers which allow non-NTS traffic are affected by a denial of...

1 affected package

rust-ntpd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
rust-ntpd Needs evaluation Needs evaluation Not in release — —
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CVE-2024-38528

Medium priority
Needs evaluation

nptd-rs is a tool for synchronizing your computer's clock, implementing the NTP and NTS protocols. There is a missing limit for accepted NTS-KE connections. This allows an unauthenticated remote attacker to crash ntpd-rs when an...

1 affected package

rust-ntpd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
rust-ntpd Not affected Needs evaluation Not in release Not in release —
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