CVE-2026-68418
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.
How to fix
- Linux Linux4e75028c000e9560a7ff66a23d7cd872a967ab7e, d52ff592abfcd56234f266aa245c489f70b1c554, ad68e0b759f9569f0dfea84f035c91eadb979802, ec675b4cdfd378d8c9dd8c93126c024f2469bd79, 728211c815f6eef28dd3df2a5b6297483185aa20, b9b0889071569d43623c260074e159cd8f26adb1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | b48c24c2d710cf34810c555dcef883a3d35a9c08 ≤ v < 4e75028c000e9560a7ff66a23d7cd872a967ab7e, b48c24c2d710cf34810c555dcef883a3d35a9c08 ≤ v < d52ff592abfcd56234f266aa245c489f70b1c554, b48c24c2d710cf34810c555dcef883a3d35a9c08 ≤ v < ad68e0b759f9569f0dfea84f035c91eadb979802, b48c24c2d710cf34810c555dcef883a3d35a9c08 ≤ v < ec675b4cdfd378d8c9dd8c93126c024f2469bd79, b48c24c2d710cf34810c555dcef883a3d35a9c08 ≤ v < 728211c815f6eef28dd3df2a5b6297483185aa20, b48c24c2d710cf34810c555dcef883a3d35a9c08 ≤ v < b9b0889071569d43623c260074e159cd8f26adb1, 5.14 | 4e75028c000e9560a7ff66a23d7cd872a967ab7e, d52ff592abfcd56234f266aa245c489f70b1c554, ad68e0b759f9569f0dfea84f035c91eadb979802, ec675b4cdfd378d8c9dd8c93126c024f2469bd79, 728211c815f6eef28dd3df2a5b6297483185aa20, b9b0889071569d43623c260074e159cd8f26adb1 |
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