VulnerabilityPublished 14 Oct 2026Updated 19 Oct 2026

CVE-2026-98429: Linux kernel · RDMA/efa: Keep EQ resources alive while IRQ is registered

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e22a3627b7151754f07f90ea3d1ab6e85f5d93f4 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e22a3627b7151754f07f90ea3d1ab6e85f5d93f4, c767e2812cac83fef70fb8932c3f0fe97dff9388, 38871ff47e2a02f8d9a333a65f358d987247b5b0 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 14 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2a152512a155aaf27c3e67834ffafaed9525a7b5, < e22a3627b7151754f07f90ea3d1ab6e85f5d93f4	Fixed in e22a3627b7151754f07f90ea3d1ab6e85f5d93f4
LinuxLinux	Affected ≥ 2a152512a155aaf27c3e67834ffafaed9525a7b5, < c767e2812cac83fef70fb8932c3f0fe97dff9388	Fixed in c767e2812cac83fef70fb8932c3f0fe97dff9388
LinuxLinux	Affected ≥ 2a152512a155aaf27c3e67834ffafaed9525a7b5, < 38871ff47e2a02f8d9a333a65f358d987247b5b0	Fixed in 38871ff47e2a02f8d9a333a65f358d987247b5b0
LinuxLinux	Affected ≥ 2a152512a155aaf27c3e67834ffafaed9525a7b5, < 795eb34bfd8b1ab347adc41a11e4bb97c3ac0ce6	Fixed in 795eb34bfd8b1ab347adc41a11e4bb97c3ac0ce6
LinuxLinux	Affected ≥ 2a152512a155aaf27c3e67834ffafaed9525a7b5, < 9ecd3dcbdf1f315aadc049b291f59c79dc478062	Fixed in 9ecd3dcbdf1f315aadc049b291f59c79dc478062
LinuxLinux	Affected ≥ 2a152512a155aaf27c3e67834ffafaed9525a7b5, < 3cd652dfcd822af26ba75d6d2d245ea7f73b499e	Fixed in 3cd652dfcd822af26ba75d6d2d245ea7f73b499e

AI-suggested

A fix is available and has been applied in the Linux kernel commits identified by the fixedVersions hashes. Users should update to a kernel version that includes these fixes to remediate the vulnerability. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's RDMA/efa subsystem was fixed by ensuring that EQ resources remain alive while the IRQ handler is registered. The issue involved the IRQ handler accessing EQ state and DMA buffers before they were fully initialized or after they were freed, causing potential use-after-free conditions. The fix involved changing the initialization and teardown order to properly synchronize resource management.

Impact

The vulnerability could lead to use-after-free conditions in the kernel, potentially causing system instability or crashes. No public exploit or in-the-wild exploitation is known. The impact is limited to affected kernel versions with the RDMA/efa driver and could affect system reliability or security if exploited.

Summary

CVE-2026-98429 addresses a race condition in the Linux kernel's RDMA/efa driver where the completion IRQ handler could access EQ state and DMA buffers before they were fully initialized or after they were freed. Specifically, the IRQ was registered before the EQ state was initialized, and during teardown, the buffer was released before free_irq() synchronized the handler. The patch initializes the EQ without arming it, registers the IRQ, then arms the EQ, and reverses the resource release order during teardown by freeing the IRQ before destroying the EQ. This prevents use-after-free scenarios related to IRQ handling and EQ resource management.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 11:18 UTC

Technical details

References

Community reviews

Related threats