CVE-2026-74397
In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier mlx5_ib_alloc_transport_domain() allocates a transport domain and then may fail in mlx5_ib_enable_lb(). In that case, the allocated TD is leaked. Fix this by deallocating the TD when mlx5_ib_enable_lb() returns an error. Also return 0 explicitly in the no-loopback-capability success branch, and move dev->lb.mutex initialization to mlx5_ib_stage_init_init().
Affected versions
Linux kernel versions
4.5
and later are affected. Fixed in
6.6.145,
6.12.97,
6.18.40,
7.1.5,
7.2-rc1
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-74397?
CVE-2026-74397 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.5 onward and has been patched in 6.6.145, 6.12.97, 6.18.40 and others. CVE-2026-74397 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-2026-74397?
Yes. CVE-2026-74397 has been patched. Fixed versions include 6.6.145, 6.12.97, 6.18.40 and others. If you are running Linux kernel 4.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74397 actively exploited?
No. CVE-2026-74397 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.