CVE-2026-89510 (CVSS 7.8)

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.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other 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

Frequently Asked Questions

What is CVE-2026-89510? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-89510? +

CVE-2026-89510 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-89510? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-89510