CVE-2026-23058
In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak Fix similar memory leak as in commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak"). In ems_usb_open(), the URBs for USB-in transfers are allocated, added to the dev->rx_submitted anchor and submitted. In the complete callback ems_usb_read_bulk_callback(), the URBs are processed and resubmitted. In ems_usb_close() the URBs are freed by calling usb_kill_anchored_urbs(&dev->rx_submitted). However, this does not take into account that the USB framework unanchors the URB before the complete function is called. This means that once an in-URB has been completed, it is no longer anchored and is ultimately not released in ems_usb_close(). Fix the memory leak by anchoring the URB in the ems_usb_read_bulk_callback() to the dev->rx_submitted anchor.
Affected versions
Linux kernel versions
2.6.32
and later are affected. Fixed in
5.10.249,
5.15.199,
6.1.162,
6.6.122,
6.12.68,
6.18.8,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2026-23058 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/0ce73a0eb5a27070957b67fd74059b6da89cc516
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PatchKernel patch commithttps://git.kernel.org/stable/c/46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a
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PatchKernel patch commithttps://git.kernel.org/stable/c/61e6d3674c3d1da1475dc207b3e75c55d678d18e
Frequently asked questions
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What is CVE-2026-23058?
CVE-2026-23058 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.32 onward and has been patched in 5.10.249, 5.15.199, 6.1.162 and others. CVE-2026-23058 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-2026-23058?
Yes — CVE-2026-23058 has been patched. Fixed versions include 5.10.249, 5.15.199, 6.1.162 and others. If you are running Linux kernel 2.6.32 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-23058 actively exploited?
No — CVE-2026-23058 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.