CVE-2025-71105

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

f2fs: use global inline_xattr_slab instead of per-sb slab cache

As Hong Yun reported in mailing list:

loop7: detected capacity change from 0 to 131072

------------[ cut here ]------------

kmem_cache of name 'f2fs_xattr_entry-7:7' already exists

WARNING: CPU: 0 PID: 24426 at mm/slab_common.c:110 kmem_cache_sanity_check mm/slab_common.c:109 [inline]

WARNING: CPU: 0 PID: 24426 at mm/slab_common.c:110 __kmem_cache_create_args+0xa6/0x320 mm/slab_common.c:307

CPU: 0 UID: 0 PID: 24426 Comm: syz.7.1370 Not tainted 6.17.0-rc4 #1 PREEMPT(full)

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014

RIP: 0010:kmem_cache_sanity_check mm/slab_common.c:109 [inline]

RIP: 0010:__kmem_cache_create_args+0xa6/0x320 mm/slab_common.c:307

Call Trace:

 __kmem_cache_create include/linux/slab.h:353 [inline]

 f2fs_kmem_cache_create fs/f2fs/f2fs.h:2943 [inline]

 f2fs_init_xattr_caches+0xa5/0xe0 fs/f2fs/xattr.c

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References