Medium severity5.5NVD Advisory· Published May 8, 2026· Updated May 26, 2026

CVE-2026-43393

Description

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

btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies()

Fix a chunk map leak in btrfs_map_block(): if we return early with -EINVAL, we're not freeing the chunk map that we've just looked up.

Affected products

Linux/Kernel3 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.12,<6.12.78
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
btrfs/btrfsllm-fuzzy
osv-coords39 versions
pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Micro%206.2 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2016.0 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.2 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.2 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.2 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2016.0 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
< 6.12.0-160000.35.1+ 38 more
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1

cvss	0.358
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000

CVE-2026-43393

Description

Affected products

Patches

Vulnerability mechanics

References

News mentions