CVE-2026-42483
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to...
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
9.8
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
- Record
CVE-2026-42483- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-787, CWE-122
- Updated
- 2026-11-02
CVE List
7.3
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
- Record
CVE-2026-42483- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-122
- Updated
- 2026-11-02
EUVDEUVD-2026-26530
7.3
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
- Record
EUVD-2026-26530- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-h95h-gpf2-gm79
9.8
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to...
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
- Record
GHSA-h95h-gpf2-gm79- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-122, CWE-787
- Updated
- 2026-11-02
OSV
7.3
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
- Record
CVE-2026-42483- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-42483
9.8
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
- Record
DEBIAN-CVE-2026-42483- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-42483
9.8
A heap-based buffer overflow in the Kerberos hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted Kerberos hash file. The issue affects module_hash_decode in multiple Kerberos-related modules because account_info_len is calculated from untrusted delimiter positions without upper-bound validation before memcpy copies the data into a fixed-size account_info buffer.
- Record
UBUNTU-CVE-2026-42483- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
hashcatDebian:12 |
All versions, plus listed versions 6.2.6+ds1-16.2.6+ds2-17.1.2+ds1-17.1.2+ds1-27.1.2+ds1-37.1.2+ds1-4 |
None known |
hashcatDebian:13 |
All versions, plus listed versions 6.2.6+ds2-17.1.2+ds1-17.1.2+ds1-27.1.2+ds1-37.1.2+ds1-4 |
None known |
hashcatDebian:14 |
All versions, plus listed versions 6.2.6+ds2-17.1.2+ds1-17.1.2+ds1-27.1.2+ds1-37.1.2+ds1-4 |
None known |
hashcatUbuntu:18.04:LTS |
All versions, plus listed versions 3.60-14.0.1-1 |
None known |
hashcatUbuntu:20.04:LTS |
All versions, plus listed versions 5.1.0+ds1-15.1.0+ds1-2 |
None known |
hashcatUbuntu:22.04:LTS |
All versions, plus listed versions 6.1.1+ds1-16.2.5+ds1-2 |
None known |
hashcatUbuntu:24.04:LTS |
All versions, plus listed versions 6.2.6+ds1-16.2.6+ds1-1build16.2.6+ds1-1build2 |
None known |
hashcatUbuntu:25.10 |
All versions, plus listed versions 6.2.6+ds2-1 |
None known |
hashcatUbuntu:26.10 |
All versions, plus listed versions 7.1.2+ds1-37.1.2+ds1-4 |
None known |
hashcatUbuntu:26.04:LTS |
All versions, plus listed versions 6.2.6+ds2-17.1.2+ds1-3 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-42483 is a critical vulnerability (CVSS 9.8) in Hashcat, published May 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. No source names a fixed version.
References
gist.github.com/sgInnora/107f2eb20367e47d58c911e38d56a91f
nvd.nist.gov/vuln/detail/CVE-2026-42483
github.com/advisories/GHSA-h95h-gpf2-gm79
github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42483.json
security-tracker.debian.org/tracker/CVE-2026-42483
ubuntu.com/security/CVE-2026-42483
cve.org/CVERecord?id=CVE-2026-42483