SB2026061910 - Fedora EPEL 10.2 update for rust-openssl, rust-openssl-sys
Published: June 19, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 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.
Remediation
Install update from vendor's website.