CVE-2026-68742: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10
CVE-2026-68742 is a medium severity vulnerability in Red Hat Enterprise Linux 10's SSSD component. The vulnerability arises from the sss_nss_protocol_parse_addr() function in the NSS responder, which fails to validate the addrlen field against the remaining packet body size. A local attacker can exploit this by sending a crafted GETHOSTBYADDR request to the NSS responder socket, causing an out-of-bounds read that leads to a process crash and denial of service.
AI Analysis
Technical Summary
This vulnerability in Red Hat Enterprise Linux 10 affects the SSSD service's NSS responder. Specifically, the sss_nss_protocol_parse_addr() function does not properly validate the addrlen field in incoming requests, allowing a local attacker to craft a GETHOSTBYADDR request that triggers an out-of-bounds read. This results in a process crash and denial of service condition. The CVSS 3.1 base score is 5.5, reflecting a medium severity with local attack vector, low attack complexity, and no impact on confidentiality or integrity but high impact on availability. There is no vendor advisory indicating an official fix or patch availability at this time.
Potential Impact
Successful exploitation causes an out-of-bounds read in the NSS responder process, leading to a crash and denial of service. There is no impact on confidentiality or integrity, but availability is affected due to process termination. The attack requires local access with low complexity and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-68742 for current remediation guidance. Until a fix is available, restrict local access to the NSS responder socket to trusted users only to reduce risk.
CVE-2026-68742: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-68742 is a medium severity vulnerability in Red Hat Enterprise Linux 10's SSSD component. The vulnerability arises from the sss_nss_protocol_parse_addr() function in the NSS responder, which fails to validate the addrlen field against the remaining packet body size. A local attacker can exploit this by sending a crafted GETHOSTBYADDR request to the NSS responder socket, causing an out-of-bounds read that leads to a process crash and denial of service.
CVSS v3.1
Score 5.5medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Red Hat Enterprise Linux 10 affects the SSSD service's NSS responder. Specifically, the sss_nss_protocol_parse_addr() function does not properly validate the addrlen field in incoming requests, allowing a local attacker to craft a GETHOSTBYADDR request that triggers an out-of-bounds read. This results in a process crash and denial of service condition. The CVSS 3.1 base score is 5.5, reflecting a medium severity with local attack vector, low attack complexity, and no impact on confidentiality or integrity but high impact on availability. There is no vendor advisory indicating an official fix or patch availability at this time.
Potential Impact
Successful exploitation causes an out-of-bounds read in the NSS responder process, leading to a crash and denial of service. There is no impact on confidentiality or integrity, but availability is affected due to process termination. The attack requires local access with low complexity and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-68742 for current remediation guidance. Until a fix is available, restrict local access to the NSS responder socket to trusted users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-07-31T12:44:34.409Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-68742","vendor":"Red Hat"}]
Threat ID: 6a706affbf32cb7a346e0b55
Added to database: 08/03/2026, 10:18:39 UTC
Last enriched: 08/03/2026, 10:35:59 UTC
Last updated: 08/03/2026, 10:40:42 UTC
Views: 4
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