CVE-2026-31577

CVE-2026-31577 affects the Linux kernel nilfs2 filesystem. The vulnerability is a NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map during GC if NILFS_IOCTL_CLEAN_SEGMENTS is invoked immediately after mount, before any btree operation on the DAT inode. The root cause is i_assoc_inode...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the null pointer dereferencing in iassoc inode in nilfs2, potentially leading to general protecti...

CVE-2026-31577: NULL Pointer Dereference

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix NULL iassocinode dereference in nilfsmdtsavetoshadowmap The DAT inode's btree node cache iassocinode is initialized lazily during btree operations. However, nilfsmdtsavetoshadowmap assumes iassocinode is already...

PT-2026-34929

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A NULL pointer dereference exists in the nilfs2 component within the nilfs mdt save to shadow map function. The btree node cache i assoc inode of the DAT inode is initialized lazily duri...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013620)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013620 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds due to too large exponent of block size If field slogblocksize of...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-011202)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011202 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: replace WARNONs by nilfserror for checkpoint acquisition failure If creation or...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-010841)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-010841 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds due to too large exponent of block size If field slogblocksize of...

Unity Linux 20.1050e / 20.1060e Security Update: kernel (UTSA-2026-013405)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013405 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel bug on rename operation of broken directory Syzbot reported that in rename...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-006910)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-006910 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds/overflow in nilfssb2badoffset Patch series nilfs2: fix UBSAN...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-011398)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011398 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix OOB in nilfssetdetype The size of the nilfstypebymode array in the fs/nilfs2/dir.c fi...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-010864)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-010864 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds/overflow in nilfssb2badoffset Patch series nilfs2: fix UBSAN...

Unity Linux 20.1070a Security Update: kernel (UTSA-2026-012971)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-012971 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix OOB in nilfssetdetype The size of the nilfstypebymode array in the fs/nilfs2/dir.c fi...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013231)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013231 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free bug of nilfsroot in nilfsevictinode During unmount process of nilfs2,...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-011083)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011083 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel-infoleak in nilfsioctlwrapcopy The ioctl helper function nilfsioctlwrapcopy,...

Unity Linux 20.1050e / 20.1070e Security Update: kernel (UTSA-2026-011393)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011393 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free bug of nilfsroot in nilfsevictinode During unmount process of nilfs2,...

Unity Linux 20.1070a Security Update: kernel (UTSA-2026-013042)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013042 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free bug of nilfsroot in nilfsevictinode During unmount process of nilfs2,...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013291)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013291 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix kernel-infoleak in nilfsioctlwrapcopy The ioctl helper function nilfsioctlwrapcopy,...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013164)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013164 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix WARNING in markbufferdirty due to discarded buffer reuse A syzbot stress test using a...

Unity Linux 20.1050e / 20.1070e Security Update: kernel (UTSA-2026-010859)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-010859 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix infinite loop in nilfsmdtgetblock If the disk image that nilfs2 mounts is corrupted a...

Unity Linux 20.1050e / 20.1070e Security Update: kernel (UTSA-2026-010850)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-010850 advisory. In the Linux kernel, the following vulnerability has been resolved: nilfs2: do not write dirty data after degenerating to read-only According to syzbot's report,...