Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package openshell (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-OPENSHELL-20288885
- published30 Sept 2026
- disclosed29 Sept 2026
Introduced: 29 Sep 2026
NewCVE-2026-102820 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openshell package and not the openshell package as distributed by RHEL.
pageant provides a [PageantStream] type that implements [AsyncRead] and [AsyncWrite] traits and can be used to talk to a running Pageant instance. Prior to pageant 0.2.3, the Windows pageant crate's pageant/src/wmmessage.rs MemoryMap::read function trusts a peer-controlled u32 response length supplied through the 8192-byte Pageant shared-memory mapping reached by AgentClient::connect_pageant. A local process that impersonates the Pageant window can make query_pageant_direct allocate up to approximately 4 GiB and copy beyond the mapped view, reliably crashing a russh client and conditionally exposing adjacent committed memory. This issue is fixed in pageant 0.2.3.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2543500
- https://access.redhat.com/security/cve/CVE-2026-102820
- https://github.com/Eugeny/russh/commit/5d566989ebabfdebfe6b33243d31765a0812260b
- https://github.com/Eugeny/russh/releases/tag/v0.63.2
- https://github.com/Eugeny/russh/security/advisories/GHSA-g4mp-vgx3-xrvm