Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-ubye-e3yx-pfbb
Vulnerability ID VCID-ubye-e3yx-pfbb
Aliases CVE-2022-42905
Summary In wolfSSL before 5.5.2, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS 1.3 client or network attacker can trigger a buffer over-read on the heap of 5 bytes. (WOLFSSL_CALLBACKS is only intended for debugging.)
Status Published
Exploitability 0.5
Weighted Severity 8.2
Risk 4.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-125 Out-of-bounds Read
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 9.1 http://packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html
ssvc Track http://packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
epss 0.06142 https://api.first.org/data/v1/epss?cve=CVE-2022-42905
cvssv3.1 9.1 https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
ssvc Track https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
cvssv3.1 9.1 http://seclists.org/fulldisclosure/2023/Jan/11
ssvc Track http://seclists.org/fulldisclosure/2023/Jan/11
cvssv3.1 9.1 https://github.com/wolfSSL/wolfssl/releases
ssvc Track https://github.com/wolfSSL/wolfssl/releases
cvssv3.1 9.1 https://github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable
ssvc Track https://github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable
cvssv3.1 9.1 https://www.wolfssl.com/docs/security-vulnerabilities/
ssvc Track https://www.wolfssl.com/docs/security-vulnerabilities/
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2022-42905
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-42905
https://github.com/wolfSSL/wolfssl/releases
https://www.wolfssl.com/docs/security-vulnerabilities/
11 http://seclists.org/fulldisclosure/2023/Jan/11
CVE-2022-42905 https://nvd.nist.gov/vuln/detail/CVE-2022-42905
v5.5.2-stable https://github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable
wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html http://packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Found at http://packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-02T18:39:33Z/ Found at http://packetstormsecurity.com/files/170610/wolfSSL-WOLFSSL_CALLBACKS-Heap-Buffer-Over-Read.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Found at https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-02T18:39:33Z/ Found at https://blog.trailofbits.com/2023/01/12/wolfssl-vulnerabilities-tlspuffin-fuzzing-ssh/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Found at http://seclists.org/fulldisclosure/2023/Jan/11
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-02T18:39:33Z/ Found at http://seclists.org/fulldisclosure/2023/Jan/11
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Found at https://github.com/wolfSSL/wolfssl/releases
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-02T18:39:33Z/ Found at https://github.com/wolfSSL/wolfssl/releases
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Found at https://github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-02T18:39:33Z/ Found at https://github.com/wolfSSL/wolfssl/releases/tag/v5.5.2-stable
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Found at https://www.wolfssl.com/docs/security-vulnerabilities/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-05-02T18:39:33Z/ Found at https://www.wolfssl.com/docs/security-vulnerabilities/
Exploit Prediction Scoring System (EPSS)
Percentile 0.90773
EPSS Score 0.06142
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T16:35:54.629929+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.0.0