cbcvebase.
CVE-2024-50015
published 2024-10-21

CVE-2024-50015: In the Linux kernel, the following vulnerability has been resolved: ext4: dax: fix overflowing extents beyond inode size when partially writing The…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.2th percentile
In the Linux kernel, the following vulnerability has been resolved: ext4: dax: fix overflowing extents beyond inode size when partially writing The dax_iomap_rw() does two things in each iteration: map written blocks and copy user data to blocks. If the process is killed by user(See signal handling in dax_iomap_iter()), the copied data will be returned and added on inode size, which means that the length of written extents may exceed the inode size, then fsck will fail. An example is given as: dd if=/dev/urandom of=file bs=4M count=1 dax_iomap_rw iomap_iter // round 1 ext4_iomap_begin ext4_iomap_alloc // allocate 0~2M extents(written flag) dax_iomap_iter // copy 2M data iomap_iter // round 2 iomap_iter_advance iter->pos += iter->processed // iter->pos = 2M ext4_iomap_begin ext4_iomap_alloc // allocate 2~4M extents(written flag) dax_iomap_iter fatal_signal_pending done = iter->pos - iocb->ki_pos // done = 2M ext4_handle_inode_extension ext4_update_inode_size // inode size = 2M fsck reports: Inode 13, i_size is 2097152, should be 4194304. Fix? Fix the problem by truncating extents if the written length is smaller than expected.

Affected

31 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
debianlinux-6.1< linux 6.1.115-1 (bookworm)linux 6.1.115-1 (bookworm)
linuxlinux
linuxlinux>= 776722e85d3b0936253ecc3d14db4fba37f191ba < f8a7c342326f6ad1dfdb30a18dd013c70f5e9669f8a7c342326f6ad1dfdb30a18dd013c70f5e9669
linuxlinux>= 776722e85d3b0936253ecc3d14db4fba37f191ba < 8c30a9a8610c314554997f86370140746aa356618c30a9a8610c314554997f86370140746aa35661
linuxlinux>= 776722e85d3b0936253ecc3d14db4fba37f191ba < abfaa876b948baaea4d14f21a1963789845c8b4cabfaa876b948baaea4d14f21a1963789845c8b4c
linuxlinux>= 776722e85d3b0936253ecc3d14db4fba37f191ba < 5efccdee4a7d507a483f20f880b809cc4eaef14d5efccdee4a7d507a483f20f880b809cc4eaef14d
linuxlinux>= 776722e85d3b0936253ecc3d14db4fba37f191ba < a9f331f51515bdb3ebc8d0963131af367ef468f6a9f331f51515bdb3ebc8d0963131af367ef468f6
linuxlinux>= 776722e85d3b0936253ecc3d14db4fba37f191ba < ec0dd451e236c46e4858d53e9e82bae7797a7af5ec0dd451e236c46e4858d53e9e82bae7797a7af5
linuxlinux>= 776722e85d3b0936253ecc3d14db4fba37f191ba < dda898d7ffe85931f9cca6d702a51f33717c501edda898d7ffe85931f9cca6d702a51f33717c501e
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
linuxlinux_kernel>= 0 < 6.1.115-16.1.115-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
linuxlinux_kernel>= 0 < 6.11.4-16.11.4-1
linuxlinux_kernel>= 0 < 5.15.0-127.1375.15.0-127.137
linuxlinux_kernel>= 0 < 6.8.0-54.566.8.0-54.56
linuxlinux_kernel>= 0 < 6.11.0-18.186.11.0-18.18
linuxlinux_kernel>= 4.10 < 5.10.2275.10.227
linuxlinux_kernel>= 5.11 < 5.15.1685.15.168
linuxlinux_kernel>= 5.16 < 6.1.1136.1.113
linuxlinux_kernel>= 6.11 < 6.11.36.11.3
linuxlinux_kernel>= 6.2 < 6.6.556.6.55
linuxlinux_kernel>= 6.7 < 6.10.146.10.14
msrcazl3_kernel_6.6.51.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.57.1-2_on_azure_linux_3.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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