Red Hat Security Advisory: rsync security update
The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool. Security Fix(es): * rsync: rsync: Remote memory disclosure via integer overflow in compressed-token decoding (CVE-2026-43618) * rsync: TOCTOU symlink race condition allowing local privilege escalation in daemon mode without chroot. (CVE-2026-29518) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The rsync utility in Red Hat Enterprise Linux 8 and 9 contains two security flaws. CVE-2026-43618 is a remote memory disclosure vulnerability caused by an integer overflow during compressed-token decoding, potentially exposing sensitive memory contents. CVE-2026-29518 is a TOCTOU symlink race condition in daemon mode without chroot that can be exploited for local privilege escalation. Red Hat has issued security advisories RHSA-2026:26408 and RHSA-2026:26410 providing updated rsync packages that fix these vulnerabilities across multiple architectures including x86_64, s390x, ppc64le, and aarch64. The advisories include detailed package versions and instructions for applying the updates.
Potential Impact
Successful exploitation of CVE-2026-43618 could lead to remote disclosure of memory contents, potentially exposing sensitive information. CVE-2026-29518 allows a local attacker to escalate privileges on systems running the rsync daemon in non-chroot mode by exploiting a symlink race condition. Both vulnerabilities pose significant risks to confidentiality and system integrity if left unpatched.
Mitigation Recommendations
Red Hat has released official security updates for rsync in Red Hat Enterprise Linux 8 and 9 that address these vulnerabilities. Users should apply the updates as described in Red Hat advisory RHSA-2026:26408 for RHEL 8 and RHSA-2026:26410 for RHEL 9. The advisories provide detailed package names and versions for all affected architectures. Applying these patches fully mitigates the vulnerabilities. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: rsync security update
Description
The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool. Security Fix(es): * rsync: rsync: Remote memory disclosure via integer overflow in compressed-token decoding (CVE-2026-43618) * rsync: TOCTOU symlink race condition allowing local privilege escalation in daemon mode without chroot. (CVE-2026-29518) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The rsync utility in Red Hat Enterprise Linux 8 and 9 contains two security flaws. CVE-2026-43618 is a remote memory disclosure vulnerability caused by an integer overflow during compressed-token decoding, potentially exposing sensitive memory contents. CVE-2026-29518 is a TOCTOU symlink race condition in daemon mode without chroot that can be exploited for local privilege escalation. Red Hat has issued security advisories RHSA-2026:26408 and RHSA-2026:26410 providing updated rsync packages that fix these vulnerabilities across multiple architectures including x86_64, s390x, ppc64le, and aarch64. The advisories include detailed package versions and instructions for applying the updates.
Potential Impact
Successful exploitation of CVE-2026-43618 could lead to remote disclosure of memory contents, potentially exposing sensitive information. CVE-2026-29518 allows a local attacker to escalate privileges on systems running the rsync daemon in non-chroot mode by exploiting a symlink race condition. Both vulnerabilities pose significant risks to confidentiality and system integrity if left unpatched.
Mitigation Recommendations
Red Hat has released official security updates for rsync in Red Hat Enterprise Linux 8 and 9 that address these vulnerabilities. Users should apply the updates as described in Red Hat advisory RHSA-2026:26408 for RHEL 8 and RHSA-2026:26410 for RHEL 9. The advisories provide detailed package names and versions for all affected architectures. Applying these patches fully mitigates the vulnerabilities. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:26408
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-43618"]
- State
- PUBLISHED
Threat ID: 6a3270570b89be68881d3b11
Added to database: 06/17/2026, 10:00:55 UTC
Last enriched: 08/14/2026, 22:51:05 UTC
Last updated: 09/15/2026, 22:01:33 UTC
Views: 114
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