CVE-2026-89651

CVE-2026-89651 is an out-of-bounds read in the Linux kernel's Ceph MDS client during session setup. In handle_session(), the match.path and match.fs_name byte strings are decoded with the bare ceph_decode_copy() without a preceding ceph_decode_need() bounds check, and the enclosing MDSCapAuth/MDS...

CVE-2026-89649

This out-of-bounds read affects the Linux kernel's CephFS client , specifically the __build_xattrs() function. When decoding the xattr blob supplied by a Ceph metadata server (MDS), the 32-bit value length of the final attribute is never validated against the blob size via a ceph_decode_need() ch...

CVE-2026-89650 ceph: bound num_export_targets array for mds info v2/v3

In the Linux kernel, the following vulnerability has been resolved: ceph: bound numexporttargets array for mds info v2/v3 cephmdsmapdecode in fs/ceph/mdsmap.c reads numexporttargets from each per-mds info record and advances the decode cursor by numexporttargets sizeofu32 without first checking...

CVE-2026-89650

In the Linux kernel, the following vulnerability has been resolved: ceph: bound numexporttargets array for mds info v2/v3 cephmdsmapdecode in fs/ceph/mdsmap.c reads numexporttargets from each per-mds info record and advances the decode cursor by numexporttargets sizeofu32 without first checking...

CVE-2026-89649 ceph: bound xattr value length in __build_xattrs()

In the Linux kernel, the following vulnerability has been resolved: ceph: bound xattr value length in buildxattrs buildxattrs decodes the MDS-supplied xattr blob one attribute at a time. For each attribute it reads a 32-bit name length, advances past the name bytes, reads a 32-bit value length,...

CVE-2026-89650 ceph: bound num_export_targets array for mds info v2/v3

In the Linux kernel, the following vulnerability has been resolved: ceph: bound numexporttargets array for mds info v2/v3 cephmdsmapdecode in fs/ceph/mdsmap.c reads numexporttargets from each per-mds info record and advances the decode cursor by numexporttargets sizeofu32 without first checking...

CVE-2026-89649 ceph: bound xattr value length in __build_xattrs()

In the Linux kernel, the following vulnerability has been resolved: ceph: bound xattr value length in buildxattrs buildxattrs decodes the MDS-supplied xattr blob one attribute at a time. For each attribute it reads a 32-bit name length, advances past the name bytes, reads a 32-bit value length,...

CVE-2026-89650

CVE-2026-89650 is a slab-out-of-bounds read in the Linux kernel's CephFS client , specifically in ceph_mdsmap_decode() (fs/ceph/mdsmap.c). When decoding an MDS map with per-MDS info version 2 or 3, the function advances the decode cursor by num_export_targets * sizeof(u32) without verifying remai...

CVE-2026-89649

In the Linux kernel, the following vulnerability has been resolved: ceph: bound xattr value length in buildxattrs buildxattrs decodes the MDS-supplied xattr blob one attribute at a time. For each attribute it reads a 32-bit name length, advances past the name bytes, reads a 32-bit value length,...

EUVD-2026-76562

In the Linux kernel, the following vulnerability has been resolved: ceph: bound numexporttargets array for mds info v2/v3 cephmdsmapdecode in fs/ceph/mdsmap.c reads numexporttargets from each per-mds info record and advances the decode cursor by numexporttargets sizeofu32 without first checking...

CVE-2026-89640 cifs: fix loff_t underflow in cifs_remap_file_range() when len == 0

In the Linux kernel, the following vulnerability has been resolved: cifs: fix lofft underflow in cifsremapfilerange when len == 0 With len == 0 clone to EOF, the effective length is computed as: len = srcinode-isize - off; If off isize, this is a negative lofft, corrupting the ByteCount in the...

CVE-2026-89640 cifs: fix loff_t underflow in cifs_remap_file_range() when len == 0

In the Linux kernel, the following vulnerability has been resolved: cifs: fix lofft underflow in cifsremapfilerange when len == 0 With len == 0 clone to EOF, the effective length is computed as: len = srcinode-isize - off; If off isize, this is a negative lofft, corrupting the ByteCount in the...

EUVD-2026-76546

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix ALIGN overflow in symlinkdata error context loop The check added by commit 7d9a7f1f96cd "smb/client: fix possible infinite loop and oob read in symlinkdata" compared the post-ALIGN length against the remaining...

EUVD-2026-76545

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB read/write from unvalidated DataOffset in coalescet2 coalescet2 computes data pointers directly from server-supplied DataOffset fields with no validation against buffer bounds: dataareaoftgt = char...

CVE-2026-89634

CVE-2026-89634 is an integer overflow in the Linux kernel's SMB client , specifically in the symlink_data() error context loop. When an ErrorDataLength value near UINT32_MAX (e.g., 0xFFFFFFF9) is processed, ALIGN(x, 8) wraps to zero , causing the subsequent bounds check to pass and the loop to ad...

CVE-2026-89633

CVE-2026-89633 is a critical (CVSS 9.8) vulnerability in the Linux kernel's SMB client , specifically in the coalesce_t2() function. The root cause is that server-supplied DataOffset fields are used to compute data pointers without any validation against buffer boundaries. A small DataOffset valu...

CVE-2026-89634 smb: client: fix ALIGN() overflow in symlink_data() error context loop

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix ALIGN overflow in symlinkdata error context loop The check added by commit 7d9a7f1f96cd "smb/client: fix possible infinite loop and oob read in symlinkdata" compared the post-ALIGN length against the remaining...

CVE-2026-89633 smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2()

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB read/write from unvalidated DataOffset in coalescet2 coalescet2 computes data pointers directly from server-supplied DataOffset fields with no validation against buffer bounds: dataareaoftgt = char...

CVE-2026-89633 smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2()

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix OOB read/write from unvalidated DataOffset in coalescet2 coalescet2 computes data pointers directly from server-supplied DataOffset fields with no validation against buffer bounds: dataareaoftgt = char...

CVE-2026-89632

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-before-check of ReparseDataLength in reparsebufptr reparsebufptr reads buf-ReparseDataLength before checking that count covers the full fixed header: buf = struct reparsedatabuffer u8 io + off; len = sizeofbu...