Bug 2493776 (CVE-2026-53310) - CVE-2026-53310 kernel: soc/tegra: cbb: Fix cross-fabric target timeout lookup
Summary: CVE-2026-53310 kernel: soc/tegra: cbb: Fix cross-fabric target timeout lookup
Keywords:
Status: NEW
Alias: CVE-2026-53310
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-26 21:06 UTC by OSIDB Bzimport
Modified: 2026-06-29 07:58 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-06-26 21:06:59 UTC
In the Linux kernel, the following vulnerability has been resolved:

soc/tegra: cbb: Fix cross-fabric target timeout lookup

When a fabric receives an error interrupt, the error may have
occurred on a different fabric. The target timeout lookup was using
the wrong base address (cbb->regs) with offsets from a different
fabric's target map, causing a kernel page fault.

  Unable to handle kernel paging request at virtual address ffff80000954cc00
  pc : tegra234_cbb_get_tmo_slv+0xc/0x28
  Call trace:
   tegra234_cbb_get_tmo_slv+0xc/0x28
   print_err_notifier+0x6c0/0x7d0
   tegra234_cbb_isr+0xe4/0x1b4

Add tegra234_cbb_get_fabric() to look up the correct fabric device
using fab_id, and use its base address for accessing target timeout
registers.

Comment 1 Mauro Matteo Cascella 2026-06-29 07:53:43 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062620-CVE-2026-53310-41c4@gregkh/T


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