CVE-2026-68418
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.
Affected versions
Linux kernel versions
5.14
and later are affected. Fixed in
6.18.42,
7.1.6,
7.2
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-68418?
CVE-2026-68418 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.14 onward and has been patched in 6.18.42, 7.1.6 and 7.2. CVE-2026-68418 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-68418?
Yes. CVE-2026-68418 has been patched. Fixed versions include 6.18.42, 7.1.6 and 7.2. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-68418 actively exploited?
No. CVE-2026-68418 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.