Review reviewHigh

CVE-2024-26786

Linux Linux, linux kernel

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 acces...

CVSS: 7.8
EPSS: 0.23%
CISA KEV: Not listed
Published: 2024.04.04

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.23%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux Linux, linux kernel
Affected versions: >= 9227da7816dd1a42e20d41e2244cb63c205477ca < f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9, >= 9227da7816dd1a42e20d41e2244cb63c205477ca < 9526a46cc0c378d381560279bea9aa34c84298a0, >= 9227da7816dd1a42e20d41e2244cb63c205477ca < aeb004c0cd6958e910123a1607634401009c9539, >= 6.6, >= 6.6 < 6.6.21, >= 6.7 < 6.7.9, 6.8
Fixed versions: 6.6.21, 6.7.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux Linux, linux kernel and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-476