GHSA-q764-r57m-9wp9 · Severity: medium — Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted explicit values...
Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted explicit values for the field polynomial can lead to out-of-bounds memory reads or writes. Impact summary: Out of bound memory writes can lead to an application crash or even a possibility of a remote code execution, however, in all the protocols involving Elliptic Curve Cryptography that we're aware of, either only "named curves" are supported, or, if explicit curve parameters are supported, they specify an X9.62 encoding of binary (GF(2^m)) curves that can't represent problematic input values. Thus the likelihood of existence of a vulnerable application is low. In particular, the X9.62 encoding is used for ECC keys in X.509 certificates, so problematic inputs cannot occur in the context of processing X.509 certificates. Any problematic use-cases would have to be using an "exotic" curve encoding. The affected APIs include: EC_GROUP_new_curve_GF2m(), EC_GROUP_new_from_params(), and various supporting BN_GF2m_*() functions. Applications working with "exotic" explicit binary (GF(2^m)) curve parameters, that make it possible to represent invalid field polynomials with a zero constant term, via the above or similar APIs, may terminate abruptly as a result of reading or writing outside of array bounds. Remote code execution cannot easily be ruled out. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.
Conclusion & alert: CVE-2024-9143 is rated Moderate Risk (54.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.97%, 92th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +5.08% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.89% | 5.97% | +5.08% |
| 2 | 2026-04-21 | 0.64% | 0.89% | +0.25% |
| 3 | 2026-02-05 | — | 0.64% | — |
Full EPSS history (29 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 3.1 | MEDIUM |
|
2.8 | 1.4 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-q764-r57m-9wp9 · Severity: medium — Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted explicit values...
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2024-9143: 1 source package rows (openssl); 198 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 16, open 182. | https://security.alpinelinux.org/vuln/CVE-2024-9143 |
debian
|
not yet assigned | CVE-2024-9143 not yet assigned priority: Debian including 1 source packages (openssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2024-9143 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2024-9143 |
suse
|
high | CVE-2024-9143 severity important: SUSE including 65 source package names (compat-openssl098, libopenssl-1_0_0-devel, …), 454 product×package rows across 49 product lines (SUSE Linux Enterprise High Performance Computing 12 SP5, SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS, … (49 product lines)): Known Not Affected 431, Fixed 23. | https://www.suse.com/security/cve/CVE-2024-9143/ |
ubuntu
|
low | CVE-2024-9143 low priority: Ubuntu including 5 source packages (edk2, nodejs, openssl, openssl-fips, openssl1.0), 45 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 13, DNE 12, not-affected 10, released 7, ignored 3. | https://ubuntu.com/security/CVE-2024-9143 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||