NFSundown

Overview Proof-of-Concept exploit for NFSundown CVE-2025-38089. It can remotely trigger a kernel crash in an NFS server. Details A remote attacker can trigger a kernel null pointer dereference and crash the kernel by sending a specially crafted RPC request. This occurs due to improper handling of...

Linux Distros Unpatched Vulnerability : CVE-2026-89536

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: wait for in-flight client TLS handshake callback xstlshandshakesync gives xstlshandshakedone a reference to the lower transport before submitting the...

Linux Distros Unpatched Vulnerability : CVE-2026-89551

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Linux Distros Unpatched Vulnerability : CVE-2026-89541

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: harden gssunwrapresppriv length checks gssunwrapresppriv validates the RPCSECGSS opaque length with offset = u8 p - u8 head-iovbase; if offset +...

Linux Distros Unpatched Vulnerability : CVE-2026-89548

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: always drain cachecleaner before destroying a cachedetail sunrpcdestroycachedetail only cancels the global cachecleaner delayedwork when cachelist is...

Linux Distros Unpatched Vulnerability : CVE-2026-89550

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: svcauthgss: enforce krb5 token minimum length svcauthgssunwrappriv validates only an upper bound on the wire-supplied opaque length before handing the...

Linux Distros Unpatched Vulnerability : CVE-2026-89549

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - sunrpc: route to a populated pool in svcpoolforcpu svcsetnumthreads spreads the requested threads evenly across the service's pools base = nrservs / svnrpools...

Linux Distros Unpatched Vulnerability : CVE-2026-89542

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 a...

Linux Distros Unpatched Vulnerability : CVE-2026-89538

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: Reject krb5 v2 wrap tokens with oversized ec field gsskrb5unwrapv2 sets buf-len to a logical length, which can be much smaller than head0.iovlen the...

Linux Distros Unpatched Vulnerability : CVE-2026-89537

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: Reject short RFC 4121 MIC tokens in gsskrb5verifymicv2 gsskrb5verifymicv2 reads the token ID at ptr0..1, the flags byte at ptr2, and padding at ptr3..7,...

Linux Distros Unpatched Vulnerability : CVE-2026-89540

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - sunrpc: init gssplock before publishing proc entry createusegssproxyprocentry publishes /proc/net/rpc/use-gss-proxy via proccreatedata before initgsspclnt runs...

Linux Distros Unpatched Vulnerability : CVE-2026-89547

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: Check svc pool percpu counter allocation svccreate initializes three per-pool percpucounter stats and ignores every return value. On SMP,...

Linux Distros Unpatched Vulnerability : CVE-2026-89545

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - sunrpc: defer rqargp and rqresp free until after RCU grace period svcrqstfree frees rqstp-rqargp and rqstp-rqresp synchronously via kfree, but defers the rqstp...

Linux Distros Unpatched Vulnerability : CVE-2026-89544

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: fix gssxdecoptionarray error path bugs Four coupled defects in the gssx XDR option-array decoder make the error paths unsafe: a NULL deref in the caller...

Linux Distros Unpatched Vulnerability : CVE-2026-89546

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - SUNRPC: close backchannel before destroying callback service A backchannel receive can complete a request while the NFS callback service is being torn down...

CVE-2026-89548

A flaw was found in the Linux kernel's SUNRPC component. When sunrpcdestroycachedetail is called, it may not properly drain the cachecleaner before freeing a cachedetail object. This oversight can lead to a use-after-free vulnerability, where the system attempts to access or use memory that has...

CVE-2026-89549

A flaw was found in the sunrpc component of the Linux kernel. When the nfsd service runs with fewer threads than available pools, a transport can be routed to a pool with no active threads. This prevents the connection from being processed, causing it to hang indefinitely. This can lead to a Deni...

CVE-2026-89551

A flaw was found in the Linux kernel's SUNRPC subsystem, specifically within the xdrbuftrim function. This vulnerability occurs when xdrbuftrim attempts to reduce the size of an XDR buffer. If the buffer's length is smaller than the amount being trimmed, an integer underflow can occur, causing th...

CVE-2026-89536

A flaw was found in the Linux kernel's SUNRPC Sun Remote Procedure Call client TLS Transport Layer Security handshake process. A race condition exists where a reference to the lower transport can be prematurely released during handshake cancellation. This can lead to memory corruption, potentiall...

CVE-2026-89542

A flaw was found in the Linux kernel's SUNRPC Sun Remote Procedure Call implementation. This vulnerability, located in the gsskrb5unwrapv2 function, arises when the system processes specially crafted short tokens or tokens with an invalid length. An attacker could exploit this by providing such a...