CVE-2026-66034

A missing bounds check in the libssh2 publickey subsystem allows malicious SSH servers to trigger a client-side out-of-bounds read, leaking heap pointers that could enable security bypasses, denial of service, or code execution. Mitigation To mitigate this, strictly avoid connecting to untrusted...

CVE-2026-66012

SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check model.CheckAuth with no admin-role or read-only enforcement. This exposes 31 MCP tools, including a file tool with list/read/write/delete/rename/copy...

CVE-2026-66012 SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP

SiYuan before v3.7.2 contains a missing authorization vulnerability in the POST /mcp kernel endpoint, which is gated only by a general auth check model.CheckAuth with no admin-role or read-only enforcement. This exposes 31 MCP tools, including a file tool with list/read/write/delete/rename/copy...

CVE-2026-64525

In the Linux kernel, the following vulnerability has been resolved: xfrm: move policybydst RCU sync from per-netns .exit to .preexit The struct pernetoperations docstring in include/net/netnamespace.h explicitly warns against blocking RCU primitives in .exit handlers: Exit methods using blocking...

CVE-2026-64502

In the Linux kernel, the following vulnerability has been resolved: iio: adc: adsigmadelta: fix clearpendingevent for registerless devices adsigmadeltaclearpendingevent falls through to the status register read path for devices with hasregisters = false and no rdygpiod. For such devices,...

CVE-2026-64460

In the Linux kernel, the following vulnerability has been resolved: PCI/IOV: Skip VF Resizable BAR restore on read error sriovrestorevfrebarstate uses the VF Resizable BAR Control register to decide how many VF BARs to restore nbars and which VF BAR each iteration addresses baridx. baridx indexes...

CVE-2026-64459

In the Linux kernel, the following vulnerability has been resolved: tcp: restore RCU grace period in tcpaodestroysock Commit 51e547e8c89c "tcp: Free TCP-AO/TCP-MD5 info/keys without RCU" removed the callrcu callback from tcpaodestroysock, arguing that "the destruction of info/keys is delayed unti...

CVE-2026-64449

In the Linux kernel, the following vulnerability has been resolved: staging: vmeuser: bound slave read/write to the kernbuf size The SLAVE-path helpers buffertouser and bufferfromuser copy 'count' bytes into/out of the fixed-size kernbuf sizebuf == PCIBUFSIZE == 0x20000, 128 KiB using ppos as the...

CVE-2026-64445

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth OnAuth has two bugs in the shared-key authentication path. When the Privacy bit is set, rtwwepdecrypt is called without verifying that the frame is long enough t...

CVE-2026-64435

In the Linux kernel, the following vulnerability has been resolved: audit: Fix data races of skbqueuelen readers on auditqueue Multiple readers access auditqueue.qlen via skbqueuelen without holding the queue lock or using READONCE, while kauditd writes to this field via the skbdequeue → skbunlin...

CVE-2026-64419

In the Linux kernel, the following vulnerability has been resolved: mm/shrinker: do not hold RCU lock in shrinkerdebugfscountshow Reading the debugfs "count" file of a memcg-aware shrinker can sleep inside an RCU read-side critical section: BUG: sleeping function called from invalid context at...

CVE-2026-64399

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add permission checks for FSCTLDUPLICATEEXTENTSTOFILE The FSCTLDUPLICATEEXTENTSTOFILE arm of smb2ioctl overwrites the destination file's data via vfsclonefilerange with neither the share-level KSMBDTREECONNFLAGWRITABLE che...

CVE-2026-64395

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require source read access for duplicate extents FSCTLDUPLICATEEXTENTSTOFILE passes the source file directly to vfsclonefilerange or vfscopyfilerange without checking the SMB access mask granted to the source handle. A...

CVE-2026-64360

In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: zero-initialize buffer in hfsbnoderead hfsbnoderead can return early without writing to the output buffer when isbnodeoffsetvalid fails or when checkandcorrectrequested length corrects the length to zero. Callers suc...

CVE-2026-64351

In the Linux kernel, the following vulnerability has been resolved: net: usb: kalmia: bound RX frame length in kalmiarxfixup kalmiarxfixup computes usbpacketlength = skb-len - 2 KALMIAHEADERLENGTH as a u16, guarded only by a pre-loop check that skb-len is at least KALMIAHEADERLENGTH, which is 6. ...

CVE-2026-64335

In the Linux kernel, the following vulnerability has been resolved: USB: serial: digiacceleport: fix broken rx after throttle If the port is closed while throttled, the read urb is never resubmitted and the port will not receive any further data until the device is reconnected or the driver is...

CVE-2026-64323

In the Linux kernel, the following vulnerability has been resolved: udf: validate VAT header length against the VAT inode size udfloadvat takes the virtual partition's start offset straight from the on-disk VAT 2.0 header without checking it against the VAT inode size:...

CVE-2026-64290

In the Linux kernel, the following vulnerability has been resolved: iommufd: Break the loop on failure in iommufdfaultfopsread On a copytouser failure inside the inner listforeachentry, only the inner loop breaks; the outer while re-fetches the just-restored fault group and retries the failing...

CVE-2026-64268

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: bound Read Response placement to the RREAD length In drivers/infiniband/sw/siw/siwqprx.c, siwprocrresp places each inbound Read Response DDP segment at sge-laddr + wqe-processed and then accumulates wqe-processed, but i...

UBUNTU-CVE-2026-64373

In the Linux kernel, the following vulnerability has been resolved: cpufreq: Fix hotplug-suspend race during reboot During system reboot, cpufreqsuspend is called via the kernelrestart - deviceshutdown path. Unlike the normal system suspend path, the reboot path does not call freezeprocesses, so...