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Ubuntu: (CVE-2024-26786): linux-raspi-realtime vulnerability

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Ubuntu: (CVE-2024-26786): linux-raspi-realtime vulnerability

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
04/04/2024
Created
02/12/2025
Added
02/11/2025
Modified
02/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix iopt_access_list_id overwrite bug Syzkaller reported the following WARN_ON: WARNING: CPU: 1 PID: 4738 at drivers/iommu/iommufd/io_pagetable.c:1360 Call Trace: iommufd_access_change_ioas+0x2fe/0x4e0 iommufd_access_destroy_object+0x50/0xb0 iommufd_object_remove+0x2a3/0x490 iommufd_object_destroy_user iommufd_access_destroy+0x71/0xb0 iommufd_test_staccess_release+0x89/0xd0 __fput+0x272/0xb50 __fput_sync+0x4b/0x60 __do_sys_close __se_sys_close __x64_sys_close+0x8b/0x110 do_syscall_x64 The mismatch between the access pointer in the list and the passed-in pointer is resulting from an overwrite of access->iopt_access_list_id, in iopt_add_access(). Called from iommufd_access_change_ioas() when xa_alloc() succeeds but iopt_calculate_iova_alignment() fails. Add a new_id in iopt_add_access() and only update iopt_access_list_id when returning successfully.

Solution(s)

  • ubuntu-upgrade-linux-raspi-realtime

References

  • https://attackerkb.com/topics/cve-2024-26786
  • CVE - 2024-26786
  • https://git.kernel.org/stable/c/9526a46cc0c378d381560279bea9aa34c84298a0
  • https://git.kernel.org/stable/c/aeb004c0cd6958e910123a1607634401009c9539
  • https://git.kernel.org/stable/c/f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9
  • https://www.cve.org/CVERecord?id=CVE-2024-26786
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