CVE-2026-74459
In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure es58x_read_bulk_callback() resubmits the RX URB after processing a received packet. If the resubmit succeeds, the URB remains anchored and will be handled by the normal RX path or by teardown. However, if usb_submit_urb() fails, the callback unanchors the URB and then returns directly. This skips the existing free_urb path, so the coherent transfer buffer allocated with usb_alloc_coherent() is not released. Reuse the existing free_urb path after a resubmit failure so that the RX coherent buffer is freed before leaving the callback.
Affected versions
Linux kernel versions
6.6.130,
6.12.77,
6.18.17,
5.15.203,
6.1.167,
6.19.7,
7.0
and later are affected. Fixed in
6.6.151,
6.12.103,
6.18.44,
7.1.8,
7.2-rc6
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-74459?
CVE-2026-74459 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.6.130 onward and has been patched in 6.6.151, 6.12.103, 6.18.44 and others. CVE-2026-74459 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-2026-74459?
Yes. CVE-2026-74459 has been patched. Fixed versions include 6.6.151, 6.12.103, 6.18.44 and others. If you are running Linux kernel 6.6.130 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74459 actively exploited?
No. CVE-2026-74459 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.