CVE-2026-89644

A flaw was found in the Linux kernel's btrfs filesystem. When performing direct I/O writes in a NOCOW No Copy-On-Write range, an extent map reference may not be properly released if an error occurs during extent creation. This oversight can lead to an extent map leak, potentially causing memory...

CVE-2026-89644

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

EUVD-2026-76556

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

CVE-2026-89644 btrfs: fix extent map leak in NOCOW direct I/O write

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfsdioiomapbegin calls btrfsgetextent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range,...

CVE-2026-89644

CVE-2026-89644 affects the btrfs filesystem in the Linux kernel. The root cause is an extent map reference leak in the NOCOW direct I/O write path: btrfs_get_blocks_direct_write() fails to drop the extent map obtained from btrfs_get_extent() when btrfs_create_dio_extent() returns an error (e.g., ...

PT-2026-90360

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map leak in NOCOW direct I/O write btrfs dio iomap begin calls btrfs get extent, which returns an extent map reference that must be dropped on all exit paths. For direct writes into a NOCOW range, btrfs get bloc...

EUVD-2025-5272

Malicious code in bioql PyPI...

btrfs: do proper folio cleanup when run_delalloc_nocow() failed

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Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: btrfs: Proper folio cleanup should be performed when rundelallocnocow fails. BUG With CONFIGDEBUGVM set, test case generic/476 may crash due to the following VMBUGONFOLIO issues: - BTRFS error device dm-3: cowfilerange failed;...

UBUNTU-CVE-2024-57975

In the Linux kernel, the following vulnerability has been resolved: btrfs: do proper folio cleanup when rundelallocnocow failed BUG With CONFIGDEBUGVM set, test case generic/476 has some chance to crash with the following VMBUGONFOLIO: BTRFS error device dm-3: cowfilerange failed, start 1146880 e...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from not properly cleaning up folio when rundelallocnocow fails...

CVE-2024-40962

In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: allocate dummy checksums for zoned NODATASUM writes Shin'ichiro reported that when he's running fstests' test-case btrfs/167 on emulated zoned devices, he's seeing the following NULL pointer dereference in...

CVE-2024-40962

In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: allocate dummy checksums for zoned NODATASUM writes Shin'ichiro reported that when he's running fstests' test-case btrfs/167 on emulated zoned devices, he's seeing the following NULL pointer dereference in...

CVE-2024-40962

CVE-2024-40962 affects the Linux kernel btrfs zoning code. The issue is a NULL pointer dereference in btrfs_zone_finish_endio() when handling zoned NODATASUM writes under zoned emulation for conventional zones. The fix, as described in the disclosure, is to allocate dummy checksums for zoned NODA...

CVE-2024-40962 btrfs: zoned: allocate dummy checksums for zoned NODATASUM writes

In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: allocate dummy checksums for zoned NODATASUM writes Shin'ichiro reported that when he's running fstests' test-case btrfs/167 on emulated zoned devices, he's seeing the following NULL pointer dereference in...

CVE-2024-40962 btrfs: zoned: allocate dummy checksums for zoned NODATASUM writes

In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: allocate dummy checksums for zoned NODATASUM writes Shin'ichiro reported that when he's running fstests' test-case btrfs/167 on emulated zoned devices, he's seeing the following NULL pointer dereference in...

SUSE CVE-2021-47508

In the Linux kernel, the following vulnerability has been resolved: btrfs: free exchange changeset on failures Fstests runs on my VMs have show several kmemleak reports like the following. unreferenced object 0xffff88811ae59080 size 64: comm "xfsio", pid 12124, jiffies 4294987392 age 6.368s hex...