What’s Vulnerable › Vulnerabilities

CVE-2026-89510: RDMA/cxgb4: Cancel reg_work before freeing device on remove

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Cancel reg_work before freeing device on remove c4iw_uld_state_change() queues reg_work to register the RDMA device. c4iw_remove() can free ctx->dev while this work is pending or running, leaving c4iw_register_device() accessing the freed device. Cancel reg_work before removing the device. The registration work can tear down ctx->dev when registration fails, so do not unregister or deallocate it again in that case. This issue was found by an in-house static analysis tool.

Affected products

• Linux kernel: 4.15 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8
• https://git.kernel.org/stable/c/3265d558dfafab8f12f5fba06ebbf15cae9f3225
• https://git.kernel.org/stable/c/4681e731db07769846901cfabdd3e53f765eb9d3
• https://git.kernel.org/stable/c/672ee1981db10569ec96030bddb322f18382ec04
• https://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d
• https://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2
• https://git.kernel.org/stable/c/e6e79e7be87c5ea92728060a3d7fb56890a91e45
• https://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763

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