OESA-2026-4591 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: ocfs2: clear extent cache after moving/defragmenting extents The extent map cache can become stale when extents are moved or defragmented, causing subsequent...

vbox-vmdk-sparse-extent

abraxaslabs.tech · github.com/abraxas · @abraxasnull · [email protected] · vbox-vmdk-sparse-extent Write-up: https://abraxaslabs.tech/research/virtualbox-7-2-20-leftovers vbox-vmdk-sparse-extent Class: File read Reach: Local host UI:R Oracle VM VirtualBox OSS 7.2.20 f2792cf44 - Oracle A host...

btrfs_fixes

btrfsfixes: Custom BTRFS Repair Tools Custom tools written during recovery of a 12TB multi-device BTRFS pool with severe extent tree corruption that the native commands btrfs check --repair, --init-extent-tree, etc. could not repair. SeeINCIDENT-ANALYSIS.md for a structured case study of the...

Linux Distros Unpatched Vulnerability : CVE-2026-98961

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - btrfs: unlock inode and extent in caller when iouring read extent fails btrfsuringreadextent runs only after btrfsencodedread has taken the inode shared lock an...

CVE-2026-98961 btrfs: unlock inode and extent in caller when io_uring read extent fails

In the Linux kernel, the following vulnerability has been resolved: btrfs: unlock inode and extent in caller when iouring read extent fails btrfsuringreadextent runs only after btrfsencodedread has taken the inode shared lock and the extent lock. On failure it used to unlock in outfail, and a...

CVE-2026-98961

In the Linux kernel, the following vulnerability has been resolved: btrfs: unlock inode and extent in caller when iouring read extent fails btrfsuringreadextent runs only after btrfsencodedread has taken the inode shared lock and the extent lock. On failure it used to unlock in outfail, and a...

CVE-2026-98872

In the Linux kernel, the following vulnerability has been resolved: freevxfs: don't BUG on unknown typed-extent type vxfsbmaptyped handles four typed-extent types and calls BUG in its default case, so an on-disk typed extent with any other type value crashes the kernel. It is reachable from...

PT-2026-121933

In the Linux kernel, the following vulnerability has been resolved: btrfs: unlock inode and extent in caller when io uring read extent fails btrfs uring read extent runs only after btrfs encoded read has taken the inode shared lock and the extent lock. On failure it used to unlock in out fail, an...

PT-2026-117427

VideoLAN libbluray through 1.5.1 contains an uncontrolled memory allocation vulnerability in parse extent start points in clpi parse.c that trusts the num point field without bounds checking. Attackers can supply a crafted .clpi file on a disc, image, or directory with a huge num point to exhaust...

CLSA-2024-1731430561 kernel: Fix of 29 CVEs

driver core: bus: Fix double free in driver API busregister CVE-2024-50055 - net: tun: Fix use-after-free in tundetach CVE-2022-49014 - memcg: fix possible use-after-free in memcgwriteeventcontrol CVE-2022-48988 - ppp: fix pppasyncencode illegal access CVE-2024-50035 - drivers: media:...

Linux Btrfs Heap Buffer Overflow DoS

The vulnerability of the btrfsrundelayedrefs function in the fs/btrfs/extent-tree.c component of the Linux kernel is related to pointer manipulation. Exploiting this vulnerability could allow a remote attacker to cause service interruptions...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: btrfs: A sanity check for the btrfs root has been added in btrfssearchslot. Syzbot reports a nullptrderef issue in btrfssearchslot. The reproducer uses rescue=ibadroots, and the extent tree root is corrupted; as a result, the...

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: ext4: Do not cache extents during splitting Caching extents during the splitting process is risky, as it may result in stale extents remaining in the status tree. Moreover, in most cases, the corresponding extent block entries ar...

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

In the Linux kernel, the following vulnerabilities have been resolved: ext4: Fixed a slab-use-after-free in ext4splitextentat. We encountered the following use-after-free issues: BUG: KASAN: slab-use-after-free in ext4splitextentat+0xba8/0xcc0 Read of size 2 at addr ffff88810548ed08 by task...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ext4: Fixed ext4mbmarkbb with flexbg and fastcommit. In the case of the flexbg feature which is enabled by default, extents for any given inode may span across blocks from two different block groups. ext4mbmarkbb only reads the...

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

In the Linux kernel, the following vulnerability has been resolved: ext4: use of a stale path after allocation in ext4extinsertextent As Ojaswin mentioned in the link, in ext4extinsertextent, if the path is reallocated during ext4extcreatenewleaf, we will use a stale path, leading to a Use After...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: fixed the qgroup reserve leaks in cowfilerange. In the buffered write path, the dirty page owns the qgroup reserve until it creates an orderedextent. Therefore, any errors that occur before the orderedextent is created...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: “Revert ‘f2fs: fix to do sanity check on extent cache correctly’” The syzbot reports a bug in f2fs as follows: UBSAN: Array-index-out-of-bounds in fs/f2fs/f2fs.h:3275:19 Index 1409 is out of range for type ‘le32923’ aka ‘unsigned...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: The page extent mapping was set after the readfolio operation in relocateonepage. One of the CI runs triggered the following panic: Assertion failed: PagePrivatepage && page-private, in fs/btrfs/subpage.c:229 ----------...

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

In the Linux kernel, the following vulnerabilities have been resolved: fs: udf: Fix for OOB read in lengthAllocDescs handling When parsing the Allocation Extent Descriptor, lengthAllocDescs is derived from disk-based data and must be validated against the block size. Corrupted or crafted images m...