CVE-2026-90417
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry() When the device is in the fatal error state, write_tpt_entry() returns -EIO before handing the caller's preallocated skb to the transmit path; its allocation-failure returns do the same. c4iw_dereg_mr() ignores the error and frees mhp, leaking mhp->dereg_skb. c4iw_get_dma_mr() instead frees the skb a second time after dereg_mem() already consumed it, a double free. Make write_tpt_entry() the sole owner of a non-NULL skb, freeing it on every return preceding handoff to c4iw_ofld_send(): fatal error, tpt and stag allocation failure. c4iw_ofld_send() consumes the skb on success and error alike, so drop the redundant kfree_skb() in c4iw_get_dma_mr() after dereg_mem().
Affected versions
Linux kernel versions
4.8
and later are affected. Fixed in
7.2.6,
7.3-rc1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-90417?
CVE-2026-90417 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.8 onward and has been patched in 7.2.6 and 7.3-rc1. CVE-2026-90417 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-2026-90417?
Yes. CVE-2026-90417 has been patched. Fixed versions include 7.2.6 and 7.3-rc1. If you are running Linux kernel 4.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-90417 actively exploited?
No. CVE-2026-90417 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.