USN-8851-3: Linux kernel (Azure) vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Network file system NFS server daemon; - IPv6 networking; - Netfilter; CVE-2025-38724, CVE-2026-53131, CVE-2026-532...

Windows Print Spooler RCE (PrintNightmare CVE-2021-34527)

Exploits CVE-2021-34527 PrintNightmare: abuses MS-RPRN RpcAddPrinterDriverEx to register a remote printer driver pointing at an attacker-controlled UNC DLL, executing code as SYSTEM when the Print Spooler service processes the install. !/usr/bin/env python3 -- coding: utf-8 -- """Windows Print...

Ruby on Rails YAML Deserialization RCE (CVE-2013-0156)

Exploits CVE-2013-0156 in Rails 3.x: XML requests with type=yaml deserialize attacker-controlled YAML into Ruby objects, reaching Kernelsystem via Gem gadgets. !/usr/bin/env python3 -- coding: utf-8 -- """Ruby on Rails XML/YAML deserialization RCE CVE-2013-0156.""" from kittysploit import from...

kernel: ipvs: clear the svc scheduler ptr early on edit

A flaw was found in the Linux kernel's IP Virtual Server IPVS component. During the ipvseditservice operation, the svc-scheduler pointer is cleared too late when unbinding an old scheduler. This improper handling allows packets to access previously freed scheduler data, leading to a use-after-fre...

kernel: netfilter: nf_queue: pin bridge device while NFQUEUE holds fake dst

A flaw was found in the Linux kernel's netfilter component, specifically within the nfqueue functionality. When a bridged packet is queued to NFQUEUE, it can retain a reference to a bridge's private fake destination 'dst' even after the bridge teardown has begun. This can lead to a use-after-free...

Astra Linux – Vulnerability in grub2

GNU GRUB also known as GRUB2 from version 2.12 has a heap-based buffer overflow in the fs/hfs.c file, due to crafted sblock data within an HFS filesystem...

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

In the Linux kernel, the following vulnerability has been resolved: udf: Do not bother merging very long extents. When merging very long extents, we try to assign as much length as possible to the first extent. However, this is unnecessarily complicated and not really worth the effort. Moreover,...

Astra Linux – Vulnerability in Zabbix

The vulnerability is caused by an improper check to ensure that RDLENGTH does not overflow the buffer in response from the DNS server...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Do not hold the layoutget locks across multiple RPC calls When performing layoutget as part of the open compound, we must be careful to release the layout locks before calling any further RPC calls, such as setattr. The...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: NFSv4: A memory leak has been fixed in nfs4setsecuritylabel. We encounter a memory leak whenever we set a security xattr, which involves accessing nfsfattr and nfs4label...

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

In the Linux kernel, the following vulnerabilities have been resolved: s390/dasd: fixed an issue where error recovery led to data corruption on ESE devices. Extent Space Efficient ESE or thin-provisioned volumes need to be formatted on demand during normal IO processing. The dasdeseneedsformat...

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: acct: performs the last write operation from the workqueue. In 1, it was reported that the acct2 system call can be used to trigger a NULL derefrence in cases where it is set to write to a file that triggers an internal lookup...

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: jfs: fixed an array-index-out-of-bounds issue in jfsreaddir. The stbl might contain some invalid values. A check was added to return an error code in such cases...

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: bfs: Reconstructing the file type when loading from disk syzbot reports that the SIFMT bits of the inode-imode field can become invalid when: 1. The 32-bit “mode” field loaded from disk is corrupted; 2. The 32-bit “attributes”...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: does not allow unaligned truncation on released compress inode An F2FS image may become corrupted after performing the following test cases: - mkfs.f2fs -O extraattr,compression -f /dev/vdb - mount /dev/vdb...

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: nilfs2: A potential block overflow issue that could cause system hangs has been fixed. When a user executes the FITRIM command, a underflow can occur when calculating nblocks, if the endblock is too small. Since nblocks is of the...

Astra Linux – Vulnerability in Chromium

Missing authorization in the Network section of Google Chrome before version 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass system access restrictions through a crafted HTML page. Chromium security severity: Medium...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: erofs: Fixed a memory leak caused by LZMA global compressed deduplication. When testing microLZMA EROFS images with the new global compressed deduplication feature enabled -Ededupe, I discovered that some short-lived temporary...

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: jfs: fixed an invalid free of JFSIPipimap-iimap in diUnmount. syzbot detected an invalid-free in diUnmount: BUG: KASAN: double-free in slabfree mm/slub.c:3661 inline BUG: KASAN: double-free in kmemcachefree+0x71/0x110...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: pinctrl: ocelot: fixed a system hang on level-based interrupts The current implementation only calls chainedirqenter and chainedirqexit if it detects pending interrupts. However, in cases where GPIO pins are configured in leve...