Estudo-de-Caso-CVE-2026-31431-CopyFail

🐧 CVE-2026-31431 — CopyFail: Linux Kernel Privilege Escalation Complete Case Study — How it was discovered, how it works, how to test, how to replicate in a safe environment and how to fix the critical vulnerability that affects almost all Linux distributions since 2017. 🚨 Legal Notice / Disclaim...

Siemens SIMATIC S7-1500 TM MFP Integer Underflow (CVE-2026-31617)

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fncm: validate minimum blocklen in ncmunwrapntb The blocklen read from the host-supplied NTB header is checked against ntbmax but has no lower bound. When blocklen is smaller than opts-ndpsize, the bounds check of:...

PT-2026-116792

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: fix pull-bound underflow in skb checksum setup ipv6 skb maybe pull tail subtracts skb headlenskb from the unsigned max argument and passes the result to pskb pull tail as a signed int. The function does not ensure th...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: fs/ntfs3: Use variable length arrays instead of fixed-size ones. The issue with the “smatch warning” should be fixed: Error in ntfssetlabel: builtinmemcpy’s ‘uni-name’ is too small 20 vs 256...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Use memcpy for BIOS version The strlcat function with FORTIFY support triggers a panic because it assumes that the target buffer will overflow, even though the correct target buffer size is provided. In any case,...

CVE-2026-88833

A flaw was found in BusyBox's udhcpc DHCP client. When processing raw DHCP packets, the client replaces the validated packet length with an attacker-controlled value from the IP header without re-validating the minimum size. This leads to an integer underflow when subtracting header sizes, causin...

CVE-2026-98236

A flaw was found in the Linux kernel's MHI MBIM Modem Host Interface Mobile Broadband Interface Model driver. When receiving network data, the driver ignores the return value of memory copy operations when extracting datagrams. A compromised or malicious modem can supply crafted datagram offsets...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: wl1251: A potential buffer overflow issue in wl1251cmdscan has been fixed. The function wl1251cmdscan calls memcpy without checking the length of the destination buffer. This vulnerability can be mitigated by checking that the...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: nouveau/dmem: Fixed the vulnerability in the migratetoram function when there is a copy error. The nouveaudmemcopyone function ensures that the copy push command is sent to the device’s firmware, but it does not track whether the...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: VMCI: Fixed a runtime warning from memcpy in dgdispatchashost. Syzkaller encountered a “WARNING in dgdispatchashost” bug. memcpy: A field-spanning write was detected size 56 for a single field “&dginfo-msg” in...

DEBIAN-CVE-2026-47555

NVIDIA GPU Display Driver for Windows and Linux contains a vulnerability in the kernel mode layer where a user could cause uninitialized kernel memory to be copied back to userspace. A successful exploit of this vulnerability might lead to information disclosure...

CVE-2026-47555

NVIDIA GPU Display Driver for Windows and Linux contains a vulnerability in the kernel mode layer where a user could cause uninitialized kernel memory to be copied back to userspace. A successful exploit of this vulnerability might lead to information disclosure...

CVE-2026-97612

A flaw was found in the Linux kernel's Multiprotocol Label Switching MPLS networking subsystem. When all labels are removed from an encapsulated packet, the kernel fails to clear internal protocol tracking metadata, leaving stale network header references. An attacker could exploit this flaw by...

AZL-104645 CVE-2026-97612 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: net: mpls: clear innerprotocol when the last label is popped skbmplspush records the pre-encapsulation network header once, gated on !skb-innerprotocol. skbmplspop never clears that record, so it outlives the encapsulation it...

CVE-2026-90191: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: mailbox: riscv-sbi-mpxy: validate RPMI notification lengths The SBI return value controls how many bytes are copied from shared memory into the RPMI notification buffer. It is not validated against the negotiated shared-memory si...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: BPF: Fixed potential improper pointer dereferencing in bpfsysbpf. The bpfsysbpf helper function allows an eBPF program to load another eBPF program from within the kernel. In this case, the argument union bpfattr pointer along...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/i915/gem: added a missing boundary check in vmaccess A missing bounds check in vmaccess can lead to an out-of-bounds read or write in the adjacent memory area. This occurs because the len attribute is not validated before the...

Astra Linux – Vulnerability in advancecomp

It was discovered that Advancecomp v2.3 contains a heap buffer overflow issue due to the interceptormemcpy component at /sanitizercommon/sanitizercommoninterceptors.inc...

Astra Linux – Vulnerability in TIF format

LibTIFF 4.4.0 contains an out-of-bounds write vulnerability in TIFFmemcpy in libtiff/tifunix.c:346, when called from extractImageSection, located at tools/tiffcrop.c:6860. This vulnerability allows attackers to cause a denial-of-service attack through a crafted TIF file. For users who compile...

CVE-2026-84968: Out-of-bounds Read

An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended...