CVE-2026-81000

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

CVE-2026-89631

A flaw was found in the Linux kernel's Server Message Block SMB client. A remote malicious SMB server could send a specially crafted tree connect response with a byte count that is too small. This incorrect handling can lead to an integer underflow, causing the client to read beyond an allocated...

CVE-2026-89533

A flaw was found in the svcrdma component of the Linux kernel. Incorrect offset arithmetic in the svcrdmareadchunkrange function can lead to a u32 underflow. This underflow can cause the system to attempt to allocate a large amount of memory, potentially resulting in a Denial of Service DoS due t...

CVE-2026-89476

A flaw was found in the Linux kernel's Stream Control Transmission Protocol SCTP implementation. A remote attacker could exploit this by sending specially crafted duplicate RECONF responses. This action can cause an underflow in the stream-outcnt counter, potentially leading to unexpected system...

CVE-2026-89688

In the Linux kernel, the following vulnerability has been resolved: nfsd: drop the stateid, not the stateowner, on seqidop replay retry In nfs4preprocessseqidop the stateid is obtained from nfsd4lookupstateid, which holds a reference on the nfs4stid sccount but takes no reference on the stateowne...

DEBIAN-CVE-2026-89688

In the Linux kernel, the following vulnerability has been resolved: nfsd: drop the stateid, not the stateowner, on seqidop replay retry In nfs4preprocessseqidop the stateid is obtained from nfsd4lookupstateid, which holds a reference on the nfs4stid sccount but takes no reference on the stateowne...

DEBIAN-CVE-2026-89640

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

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...

AZL-100292 CVE-2026-89640 affecting package kernel for versions less than 6.6.157.1-1

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...

AZL-100812 CVE-2026-89606 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: reject too-small tag 70 packets ecryptfsparsetag70packet subtracts fixed metadata fields from the parsed packet body size to derive the encrypted filename size. A malformed packet with a body smaller than those fixed...

CVE-2026-89606

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: reject too-small tag 70 packets ecryptfsparsetag70packet subtracts fixed metadata fields from the parsed packet body size to derive the encrypted filename size. A malformed packet with a body smaller than those fixed...

DEBIAN-CVE-2026-89606

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: reject too-small tag 70 packets ecryptfsparsetag70packet subtracts fixed metadata fields from the parsed packet body size to derive the encrypted filename size. A malformed packet with a body smaller than those fixed...

CVE-2026-89593

In the Linux kernel, the following vulnerability has been resolved: hugetlb: only adjust reservation during unmapping if mapcount is 0 Since df7a6d1f6405, unmaphugepagerange can adjust reservations. In the case of folio mapped in both a parent and a child, if the parent unmaps the range first, th...

DEBIAN-CVE-2026-89593

In the Linux kernel, the following vulnerability has been resolved: hugetlb: only adjust reservation during unmapping if mapcount is 0 Since df7a6d1f6405, unmaphugepagerange can adjust reservations. In the case of folio mapped in both a parent and a child, if the parent unmaps the range first, th...

DEBIAN-CVE-2026-89551

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: xdrbuftrim: clamp buf-len to avoid underflow xdrbuftrim trims len bytes from the tail of an xdrbuf by walking the tail, pages, and head iovecs. Each per-section step uses mint so it never removes more bytes than that...

CVE-2026-89551

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: xdrbuftrim: clamp buf-len to avoid underflow xdrbuftrim trims len bytes from the tail of an xdrbuf by walking the tail, pages, and head iovecs. Each per-section step uses mint so it never removes more bytes than that...

AZL-100338 CVE-2026-89551 affecting package kernel for versions less than 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: xdrbuftrim: clamp buf-len to avoid underflow xdrbuftrim trims len bytes from the tail of an xdrbuf by walking the tail, pages, and head iovecs. Each per-section step uses mint so it never removes more bytes than that...

CVE-2026-89542

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: harden gsskrb5unwrapv2 against short tokens gsskrb5unwrapv2 reads the EC and RRC header fields at ptr+4 and ptr+6 before validating that the token is at least GSSKRB5TOKHDRLEN 16 bytes long, and its rotateleft helper pass...

DEBIAN-CVE-2026-89542

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: harden gsskrb5unwrapv2 against short tokens gsskrb5unwrapv2 reads the EC and RRC header fields at ptr+4 and ptr+6 before validating that the token is at least GSSKRB5TOKHDRLEN 16 bytes long, and its rotateleft helper pass...

AZL-100515 CVE-2026-89542 affecting package kernel for versions less than 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: harden gsskrb5unwrapv2 against short tokens gsskrb5unwrapv2 reads the EC and RRC header fields at ptr+4 and ptr+6 before validating that the token is at least GSSKRB5TOKHDRLEN 16 bytes long, and its rotateleft helper pass...