SB2026061933 - Fedora EPEL 10.3 update for rust-rpki
Published: June 19, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2026-41676)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a buffer overflow.
The vulnerability exists due to a heap/stack overflow in Deriver::derive and PkeyCtxRef::derive when deriving shared secrets into a caller-supplied buffer on OpenSSL 1.1.x. A remote attacker can provide or trigger use of a short buffer to cause a buffer overflow.
Only OpenSSL 1.1.x is affected; OpenSSL 3.x providers check the buffer length.
2) Out-of-bounds read (CVE-ID: CVE-2026-41677)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to out-of-bounds read in the *_from_pem_callback APIs when processing a user-supplied password callback result. A remote attacker can supply a callback that returns an oversized length to disclose sensitive information.
Only some versions of OpenSSL are affected, and OpenSSL 3.x is not affected.
3) Out-of-bounds write (CVE-ID: CVE-2026-41678)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to out-of-bounds write in aes::unwrap_key() when processing attacker-controlled buffer sizes. A remote attacker can provide a buffer that is smaller than required to cause memory corruption.
The issue stems from an inverted bounds assertion on the output buffer size in a safe public function.
4) Stack-based buffer overflow (CVE-ID: CVE-2026-41681)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to a stack-based buffer overflow in MdCtxRef::digest_final() when processing a caller-supplied output buffer. A remote attacker can trigger the function with an undersized output buffer to cause memory corruption.
This issue is reachable from safe Rust.
5) Out-of-bounds read (CVE-ID: CVE-2026-41898)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper bounds checking in the FFI trampolines for SslContextBuilder::set_psk_client_callback, set_psk_server_callback, set_cookie_generate_cb, and set_stateless_cookie_generate_cb when forwarding callback-returned lengths to OpenSSL. A remote attacker can trigger processing of a callback that returns an excessive length to disclose sensitive information.
The issue stems from passing the user closure's returned usize directly to OpenSSL without checking it against the &mut [u8] buffer provided to the closure.
6) Input validation error (CVE-ID: CVE-2026-42327)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to trigger undefined behavior.
The vulnerability exists due to improper handling of non-UTF-8 data in X509Ref::ocsp_responders when parsing OCSP responder URLs from a certificate's AIA extension. A remote attacker can supply a specially crafted certificate to trigger undefined behavior.
7) Heap-based buffer overflow (CVE-ID: CVE-2026-44662)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause heap corruption.
The vulnerability exists due to a heap-based buffer overflow in CipherCtxRef::cipher_update, CipherCtxRef::cipher_update_vec, and symm::Crypter::update when encrypting non-multiple-of-8 input with AES key-wrap-with-padding ciphers. A remote attacker can supply attacker-influenced plaintext length to cause heap corruption.
This only impacts applications using AES key-wrap-with-padding ciphers.
Remediation
Install update from vendor's website.