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No exploitation reportedFix available

CVE-2024-9355

No exploitation reported by the sources we read.

  • Published2024-10-01
  • WeaknessCWE-457

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability was found in Golang FIPS OpenSSL. This flaw allows a malicious user to randomly cause an uninitialized buffer length variable with a zeroed buffer to be returned in FIPS mode. It may also be possible to force a false positive match between non-equal hashes when comparing a trusted computed hmac sum to an untrusted input sum if an attacker can send a zeroed buffer in place of a pre-computed sum.  It is also possible to force a derived key to be all zeros instead of an unpredictable value.  This may have follow-on implications for the Go TLS stack.

Timeline

dates in UTC
  1. 2024-10-0119:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-9355?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-9355?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV
golang-fips/openssl
BranchAffectedFixed in
2.0≤ 2.0.3no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • delveAlmaLinux:8all versions · fixed in 1.21.2-4.module_el8.10.0+3895+92d465e0
  • git-lfsAlmaLinux:9all versions · fixed in 3.6.1-1.el9
  • go-toolsetAlmaLinux:8all versions · fixed in 1.21.13-1.module_el8.10.0+3895+92d465e0
  • golangAlmaLinux:9all versions · fixed in 1.21.13-4.el9_4and 6 other packages
  • golangAlmaLinux:8all versions · fixed in 1.21.13-3.module_el8.10.0+3900+bb1e1982and 5 other packages
  • grafanaAlmaLinux:9all versions · fixed in 9.2.10-19.el9_4and 1 other package
  • grafanaAlmaLinux:8all versions · fixed in 9.2.10-20.el8_10and 1 other package
  • grafana-pcpAlmaLinux:8all versions · fixed in 5.1.1-9.el8_10

3 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2026:66016 Red Hat Product Security33 products fixed

    Red Hat Security Advisory: osbuild-composer security update

  • RHSA-2026:59439 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: RHTAS 1.3.7 - Red Hat Trusted Artifact Signer Release

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:66016 · 33 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. Vendor fix Red Hat Product Security RHSA-2026:59439 · 1 productRed Hat Trusted Artifact Signer simplifies cryptographic signing and verifying of software artifacts such as container images, binaries and source code changes. It is a self-managed on-premise deployment of the Sigstore project available at https://sigstore.dev Platform Engineers, Software Develop…
  3. Workaround from the vendor Red Hat Product Security RHSA-2026:66016 · 33 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2024-10-01
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.16.5read 2026-10-23
  • CNAweakness (CWE)CWE-457read 2026-10-23
  • FIRST EPSSEPSS score0.3 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Published
2024-10-01
Last Modified
2026-10-22
NVD status
Deferred

Frequently asked questions

What is CVE-2024-9355?

A vulnerability was found in Golang FIPS OpenSSL. This flaw allows a malicious user to randomly cause an uninitialized buffer length variable with a zeroed buffer to be returned in FIPS mode. It may also be possible to force a false positive match between non-equal hashes when comparing a trusted computed hmac sum to an untrusted input sum if an attacker can send a zeroed buffer in place of a pre-computed sum.  It is also possible to force a derived key to be all zeros instead of an unpredictable value.  This may have follow-on implications for the Go TLS stack.

Is CVE-2024-9355 actively exploited?

Active exploitation of CVE-2024-9355 has not been confirmed. Its EPSS score was 0.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-9355?

CVE-2024-9355 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L.

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