Samba: out-of-bounds read in winbind auth_crap
Priority LOW 30CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 14 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.
Summary
An out-of-bounds read vulnerability was found in Samba due to insufficient length checks in winbindd_pam_auth_crap.c. When performing NTLM authentication, the client replies to cryptographic challenges back to the server. These replies have variable lengths, and Winbind fails to check the lan manager response length. When Winbind is used for NTLM authentication, a maliciously crafted request can trigger an out-of-bounds read in Winbind, possibly resulting in a crash.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01722 77th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 14 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | 4.18.6-1.el8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 4.18.6-1.el8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | — | 4.15.5-15.el8_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | — | 4.17.5-5.el8_8 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 4.18.6-100.el9 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 4.18.6-100.el9 | Patch available | CNA |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | — | 4.15.5-15.el8_6 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Storage 3 | — | — | No fix listed | CNA |
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.18.6-1.el8 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.18.6-1.el8 Patch available CNA
- Red Hat Enterprise Linux 8.6 Extended Update Support VendorRed Hat Affected — Fixed in 4.15.5-15.el8_6 Patch available CNA
- Red Hat Enterprise Linux 8.8 Extended Update Support VendorRed Hat Affected — Fixed in 4.17.5-5.el8_8 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 4.18.6-100.el9 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 4.18.6-100.el9 Patch available CNA
- Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.15.5-15.el8_6 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Storage 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 4.16.0 to before 4.16.10; 4.17.0 to before 4.17.9; 4.18.0 to before 4.18.4 | Vulnerable | Samba |
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* | 12.0 | Vulnerable | Debian |
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.16.0 to before 4.16.10; 4.17.0 to before 4.17.9; 4.18.0 to before 4.18.4 Vulnerable ·Samba
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian
Remediation
Red Hat 4 advisories
- RHSA-2024:0580 Released 2024-01-30 · Red Hat rating Moderatesamba security update
- Red Hat CodeReady Linux Builder EUS (v.8.8) libnetapi-devel-4.17.5-5.el8_8, libsmbclient-devel-4.17.5-5.el8_8, libwbclient-devel-4.17.5-5.el8_8 +2
- Red Hat Enterprise Linux AppStream EUS (v.8.8) samba-vfs-iouring-4.17.5-5.el8_8
- Red Hat Enterprise Linux BaseOS EUS (v.8.8) ctdb-4.17.5-5.el8_8, libnetapi-4.17.5-5.el8_8, libsmbclient-4.17.5-5.el8_8 +25
- RHSA-2024:0423 Released 2024-01-25 · Red Hat rating Moderatesamba security update
- Red Hat CodeReady Linux Builder EUS (v.8.6) libsmbclient-devel-4.15.5-15.el8_6, libwbclient-devel-4.15.5-15.el8_6, samba-devel-4.15.5-15.el8_6
- Red Hat Enterprise Linux AppStream EUS (v.8.6) samba-vfs-iouring-4.15.5-15.el8_6
- Red Hat Enterprise Linux BaseOS EUS (v.8.6) ctdb-4.15.5-15.el8_6, libsmbclient-4.15.5-15.el8_6, libwbclient-4.15.5-15.el8_6 +18
- Red Hat Virtualization 4 Hypervisor for RHEL 8 libsmbclient-4.15.5-15.el8_6, libwbclient-4.15.5-15.el8_6, samba-4.15.5-15.el8_6 +3
- RHSA-2023:7139 Released 2023-11-14 · Red Hat rating Moderatesamba security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) libnetapi-devel-4.18.6-1.el8, libsmbclient-devel-4.18.6-1.el8, libwbclient-devel-4.18.6-1.el8 +2
- Red Hat Enterprise Linux AppStream (v. 8) samba-vfs-iouring-4.18.6-1.el8
- Red Hat Enterprise Linux BaseOS (v. 8) ctdb-4.18.6-1.el8, libnetapi-4.18.6-1.el8, libsmbclient-4.18.6-1.el8 +25
Show 1 more Red Hat advisories
- RHSA-2023:6667 Released 2023-11-07 · Red Hat rating Moderatesamba security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 9) libnetapi-devel-4.18.6-100.el9, libsmbclient-devel-4.18.6-100.el9, libwbclient-devel-4.18.6-100.el9 +6
- Red Hat Enterprise Linux AppStream (v. 9) samba-client-4.18.6-100.el9, samba-krb5-printing-4.18.6-100.el9, samba-vfs-iouring-4.18.6-100.el9 +3
- Red Hat Enterprise Linux BaseOS (v. 9) libnetapi-4.18.6-100.el9, libsmbclient-4.18.6-100.el9, libwbclient-4.18.6-100.el9 +15
- Red Hat Enterprise Linux Resilient Storage (v. 9) ctdb-4.18.6-100.el9
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 and 6 more products — RHSA-2023:6667
4 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-17456 Samba: infinite loop in mdssvc rpc service for spotlightPriority HIGH 68
- TI-2023-17457 Samba: type confusion in mdssvc rpc service for spotlightPriority MEDIUM 59
- TI-2023-17458 Samba: spotlight server-side share path disclosurePriority LOW 27
- Advisory ·
Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 and 6 more products — RHSA-2023:7139
4 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-17456 Samba: infinite loop in mdssvc rpc service for spotlightPriority HIGH 68
- TI-2023-17457 Samba: type confusion in mdssvc rpc service for spotlightPriority MEDIUM 59
- TI-2023-17458 Samba: spotlight server-side share path disclosurePriority LOW 27
Show 2 more groups
- Advisory ·
Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 and 6 more products — RHSA-2024:0423
4 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-17456 Samba: infinite loop in mdssvc rpc service for spotlightPriority HIGH 68
- TI-2023-17457 Samba: type confusion in mdssvc rpc service for spotlightPriority MEDIUM 59
- TI-2023-17458 Samba: spotlight server-side share path disclosurePriority LOW 27
- Advisory ·
Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 and 6 more products — RHSA-2024:0580
4 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-17456 Samba: infinite loop in mdssvc rpc service for spotlightPriority HIGH 68
- TI-2023-17457 Samba: type confusion in mdssvc rpc service for spotlightPriority MEDIUM 59
- TI-2023-17458 Samba: spotlight server-side share path disclosurePriority LOW 27
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Storage 3 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2023:7139 |
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2023:6667 |
| Red Hat CodeReady Linux Builder EUS (v.8.6) | Fixed | RHSA-2024:0423 |
| Red Hat CodeReady Linux Builder EUS (v.8.8) | Fixed | RHSA-2024:0580 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:7139 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:6667 |
| Red Hat Enterprise Linux AppStream EUS (v.8.6) | Fixed | RHSA-2024:0423 |
| Red Hat Enterprise Linux AppStream EUS (v.8.8) | Fixed | RHSA-2024:0580 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2023:7139 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2023:6667 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.6) | Fixed | RHSA-2024:0423 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | RHSA-2024:0580 |
| Red Hat Enterprise Linux Resilient Storage (v. 9) | Fixed | RHSA-2023:6667 |
| Red Hat Virtualization 4 Hypervisor for RHEL 8 | Fixed | RHSA-2024:0423 |
Not affected: 2 products
- Red Hat Enterprise Linux AppStream (v. 8)
- Red Hat Enterprise Linux AppStream (v. 9)
Timeline
- 2026-10-02 Threatist record created from CVE-2022-2127
- 2026-10-03 Alias added: GHSA-mfwc-hx97-869v
References
More Red Hat Enterprise Linux vulnerabilities
- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
Sources
- CVE-2022-2127 · CVE Program
- CVE-2022-2127 · NVD
- FIRST EPSS
- GHSA-mfwc-hx97-869v · GitHub Advisory Database · CC BY 4.0
- CVE-2022-2127 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences