VulnerabilityPublished 18 Oct 2026

CVE-2026-98560: Linux kernel · net/rds: size a connection's path set by the transport it ends up with

Source GCVE Database

Authoritative record:CVE-2026-98560· Low

Not known to be exploited : upgrade to ba3d1f480c7a3fba963e7867ad6cc557c197acbc or 670f303169d2d36f315c40f6d3d18b5ee8498fea when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Low

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ba3d1f480c7a3fba963e7867ad6cc557c197acbc, 670f303169d2d36f315c40f6d3d18b5ee8498fea

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-7pw9-5jf8-r7cw

What to do

Upgrade Linux kernel to ba3d1f480c7a3fba963e7867ad6cc557c197acbc or 670f303169d2d36f315c40f6d3d18b5ee8498fea.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 4716af3897e95997d08183d351cece2dec9ee0c0, < ba3d1f480c7a3fba963e7867ad6cc557c197acbc	Fixed in ba3d1f480c7a3fba963e7867ad6cc557c197acbc
LinuxLinux	Affected ≥ 4716af3897e95997d08183d351cece2dec9ee0c0, < 670f303169d2d36f315c40f6d3d18b5ee8498fea	Fixed in 670f303169d2d36f315c40f6d3d18b5ee8498fea
LinuxLinux	Affected =7.0	Fixed in–
Linuxlinux/kernel`pkg:rpm/linux/kernel`Other threats	Affected =7.0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix has been implemented to recompute the number of paths after the transport is finalized, ensuring that connection creation and destruction handle the same set of paths and properly free all allocated resources. Users should apply the official Linux kernel update that includes this fix. No additional mitigation is indicated.

Description

A vulnerability in the Linux kernel's RDS networking subsystem was resolved involving incorrect sizing of a connection's path set based on the transport protocol. The issue caused mismatches between connection creation and destruction logic, leading to potential resource leaks during network namespace teardown or module unload when using RDS over TCP loopback connections.

Impact

The vulnerability causes memory leaks in the kernel when RDS connections over TCP loopback are created and destroyed, especially during network namespace teardown or module unload. This can lead to resource exhaustion over time if many such connections are created and destroyed, potentially impacting system stability or performance. There is no indication of direct code execution or privilege escalation from this issue.

Summary

The vulnerability in the Linux kernel's RDS (Reliable Datagram Sockets) subsystem arises from __rds_conn_create() computing the number of paths (npaths) based on the caller's transport before determining if the connection should use the loopback transport. This leads to allocation of multiple workqueues for paths that are not properly initialized or destroyed, as rds_conn_destroy() and rds_conn_path_destroy() only handle the loopback transport's single path correctly. Consequently, memory allocated for unused paths is leaked during connection teardown, particularly on netns teardown or module unload for local TCP RDS connections. The fix recomputes npaths after finalizing the transport to ensure consistent sizing and proper cleanup of all paths.

References

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