SB2026072191 - NULL pointer dereference in Linux kernel xfs

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-64187)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a null pointer dereference in xlog_recover_reorder_trans in the XFS log recovery code when processing a crafted log during filesystem recovery. A local user can provide a crafted log item with no regions to trigger a kernel fault and cause a denial of service.

This issue only occurs for crafted log data during recovery, as the normal runtime commit path does not generate such a transaction.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211
• https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749
• https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a
• https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4