CVE-2026-23141 btrfs: send: check for inline extents in range_is_hole_in_parent()

What is CVE-2026-23141?

CVE-2026-23141 is a medium-severity vulnerability in Linux kernel, published on 14 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

btrfs: send: check for inline extents in range_is_hole_in_parent()

Before accessing the disk_bytenr field of a file extent item we need to check if we are dealing with an inline extent. This is because for inline extents their data starts at the offset of the disk_bytenr field. So accessing the disk_bytenr means we are accessing inline data or in case the inline data is less than 8 bytes we can actually cause an invalid memory access if this inline extent item is the first item in the leaf or access metadata from other items.

Which versions are affected by CVE-2026-23141?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-23141?

Apply the vendor's patch.

Is CVE-2026-23141 being exploited?

There is no known exploitation of CVE-2026-23141 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-77745, BELL-CVE-2026-23141, DEBIAN-CVE-2026-23141, GHSA-8xwj-jmfw-cfc3, ROOT-OS-DEBIAN-11-CVE-2026-23141, ROOT-OS-DEBIAN-12-CVE-2026-23141 and 3 more.