CVE-2026-89674

A flaw in the Linux kernel nfsd component, specifically in the nfsd4_ff_encode_layoutget() function, involves multiple errors in XDR buffer size calculations. The errors cause either an out-of-bounds write (up to 5 bytes past the reserved buffer when short strings like uid=0/gid=0 are combined wi...

CVE-2026-89674 nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix XDR length calculation in nfsd4ffencodelayoutget The XDR buffer size calculation in nfsd4ffencodelayoutget has multiple errors that can result in either an out-of-bounds write or leaking uninitialized kernel memory to t...

CVE-2026-89674

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix XDR length calculation in nfsd4ffencodelayoutget The XDR buffer size calculation in nfsd4ffencodelayoutget has multiple errors that can result in either an out-of-bounds write or leaking uninitialized kernel memory to t...

CVE-2026-89604 efivarfs: Rate limit statfs() handler

In the Linux kernel, the following vulnerability has been resolved: efivarfs: Rate limit statfs handler Ravi reports that statfs may be called by unprivileged users on the efivarfs mount point, which may result in a flood of calls to the QueryVariableInfo runtime service. These calls are...

CVE-2026-89604

CVE-2026-89604 affects the Linux kernel's efivarfs filesystem. Unprivileged users can repeatedly call statfs() on the efivarfs mount point, triggering a flood of calls to the QueryVariableInfo() UEFI runtime service. On x86 systems where the EFI variable store is backed by SMM (System Management ...

EUVD-2026-76516

In the Linux kernel, the following vulnerability has been resolved: efivarfs: Rate limit statfs handler Ravi reports that statfs may be called by unprivileged users on the efivarfs mount point, which may result in a flood of calls to the QueryVariableInfo runtime service. These calls are...

CVE-2026-89604 efivarfs: Rate limit statfs() handler

In the Linux kernel, the following vulnerability has been resolved: efivarfs: Rate limit statfs handler Ravi reports that statfs may be called by unprivileged users on the efivarfs mount point, which may result in a flood of calls to the QueryVariableInfo runtime service. These calls are...

CVE-2026-89604

In the Linux kernel, the following vulnerability has been resolved: efivarfs: Rate limit statfs handler Ravi reports that statfs may be called by unprivileged users on the efivarfs mount point, which may result in a flood of calls to the QueryVariableInfo runtime service. These calls are...

CVE-2026-89603 entry: Fix seccomp bypass after ptrace with TSYNC

In the Linux kernel, the following vulnerability has been resolved: entry: Fix seccomp bypass after ptrace with TSYNC Sashiko review pointed out the following issue. If a thread is stopped in syscalltraceenter for ptrace, another thread can install a seccomp filter with SECCOMPFILTERFLAGTSYNC e.g...

EUVD-2026-76515

In the Linux kernel, the following vulnerability has been resolved: entry: Fix seccomp bypass after ptrace with TSYNC Sashiko review pointed out the following issue. If a thread is stopped in syscalltraceenter for ptrace, another thread can install a seccomp filter with SECCOMPFILTERFLAGTSYNC e.g...

CVE-2026-89581 bpf, x86: Fix per-CPU address resolution into an extended register

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

CVE-2026-89581

A BPF x86 JIT flaw in the Linux kernel causes incorrect per-CPU address resolution when the destination is an extended register (R5–R9). The root cause is an encoding error: the REX prefix is built with add_1mod() (setting REX.B) instead of add_2mod() (setting REX.R), so the high register bit is ...

CVE-2026-89581 bpf, x86: Fix per-CPU address resolution into an extended register

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

EUVD-2026-76493

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

CVE-2026-89581

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

CVE-2026-89563 ip6_tunnel: use skb_cow_head() in ip6_tnl_xmit()

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbcowhead in ip6tnlxmit ip6tnlxmit may need to expand headroom before it can push the outer IPv6 and optional encap headers. It currently does that with skbreallocheadroom, copies skb-sk ownership, consumes the...

CVE-2026-89563 ip6_tunnel: use skb_cow_head() in ip6_tnl_xmit()

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbcowhead in ip6tnlxmit ip6tnlxmit may need to expand headroom before it can push the outer IPv6 and optional encap headers. It currently does that with skbreallocheadroom, copies skb-sk ownership, consumes the...

EUVD-2026-76474

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbcowhead in ip6tnlxmit ip6tnlxmit may need to expand headroom before it can push the outer IPv6 and optional encap headers. It currently does that with skbreallocheadroom, copies skb-sk ownership, consumes the...

CVE-2026-89563 ip6_tunnel: use skb_cow_head() in ip6_tnl_xmit()

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbcowhead in ip6tnlxmit ip6tnlxmit may need to expand headroom before it can push the outer IPv6 and optional encap headers. It currently does that with skbreallocheadroom, copies skb-sk ownership, consumes the...

CVE-2026-89563

In the Linux kernel, the following vulnerability has been resolved: ip6tunnel: use skbcowhead in ip6tnlxmit ip6tnlxmit may need to expand headroom before it can push the outer IPv6 and optional encap headers. It currently does that with skbreallocheadroom, copies skb-sk ownership, consumes the...