VulnerabilityPublished 10 Aug 2026Updated 21 Oct 2026

CVE-2026-68418: Linux kernel · RDMA/irdma: Prevent user-triggered null deref on QP create

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ec675b4cdfd378d8c9dd8c93126c024f2469bd79 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ec675b4cdfd378d8c9dd8c93126c024f2469bd79, d52ff592abfcd56234f266aa245c489f70b1c554, b9b0889071569d43623c260074e159cd8f26adb1 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Aug 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 ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < ec675b4cdfd378d8c9dd8c93126c024f2469bd79	Fixed in ec675b4cdfd378d8c9dd8c93126c024f2469bd79
LinuxLinux	Affected ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < d52ff592abfcd56234f266aa245c489f70b1c554	Fixed in d52ff592abfcd56234f266aa245c489f70b1c554
LinuxLinux	Affected ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < b9b0889071569d43623c260074e159cd8f26adb1	Fixed in b9b0889071569d43623c260074e159cd8f26adb1
LinuxLinux	Affected ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < ad68e0b759f9569f0dfea84f035c91eadb979802	Fixed in ad68e0b759f9569f0dfea84f035c91eadb979802
LinuxLinux	Affected ≥ b48c24c2d710cf34810c555dcef883a3d35a9c08, < 728211c815f6eef28dd3df2a5b6297483185aa20	Fixed in 728211c815f6eef28dd3df2a5b6297483185aa20
LinuxLinux	Affected =5.14	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Prevent user-triggered null deref on QP create Previously, the user QP creation path would only attempt to populate iwqp->iwpbl if the user-provided req.user_wqe_bufs field was non-zero. The problem is that iwqp->iwpbl is unconditionally dereferenced later on in irdma_setup_virt_qp. While there was a check for iwqp->iwpbl != NULL, this check would only occur if req.user_wqe_bufs was non-zero. The end result is that a user could send a zero user_wqe_bufs value and trigger a null ptr deref. Fix this by unconditionally calling irdma_get_pbl and bailing if it fails, similar to the CQ and SRQ paths.

References

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