cbcvebase.
CVE-2025-40244
published 2025-12-04

CVE-2025-40244: In the Linux kernel, the following vulnerability has been resolved: hfsplus: fix KMSAN uninit-value issue in __hfsplus_ext_cache_extent() The syzbot reported…

PriorityP339high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.15%
4.8th percentile
In the Linux kernel, the following vulnerability has been resolved: hfsplus: fix KMSAN uninit-value issue in __hfsplus_ext_cache_extent() The syzbot reported issue in __hfsplus_ext_cache_extent(): [ 70.194323][ T9350] BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x7d0/0x990 [ 70.195022][ T9350] __hfsplus_ext_cache_extent+0x7d0/0x990 [ 70.195530][ T9350] hfsplus_file_extend+0x74f/0x1cf0 [ 70.195998][ T9350] hfsplus_get_block+0xe16/0x17b0 [ 70.196458][ T9350] __block_write_begin_int+0x962/0x2ce0 [ 70.196959][ T9350] cont_write_begin+0x1000/0x1950 [ 70.197416][ T9350] hfsplus_write_begin+0x85/0x130 [ 70.197873][ T9350] generic_perform_write+0x3e8/0x1060 [ 70.198374][ T9350] __generic_file_write_iter+0x215/0x460 [ 70.198892][ T9350] generic_file_write_iter+0x109/0x5e0 [ 70.199393][ T9350] vfs_write+0xb0f/0x14e0 [ 70.199771][ T9350] ksys_write+0x23e/0x490 [ 70.200149][ T9350] __x64_sys_write+0x97/0xf0 [ 70.200570][ T9350] x64_sys_call+0x3015/0x3cf0 [ 70.201065][ T9350] do_syscall_64+0xd9/0x1d0 [ 70.201506][ T9350] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 70.202054][ T9350] [ 70.202279][ T9350] Uninit was created at: [ 70.202693][ T9350] __kmalloc_noprof+0x621/0xf80 [ 70.203149][ T9350] hfsplus_find_init+0x8d/0x1d0 [ 70.203602][ T9350] hfsplus_file_extend+0x6ca/0x1cf0 [ 70.204087][ T9350] hfsplus_get_block+0xe16/0x17b0 [ 70.204561][ T9350] __block_write_begin_int+0x962/0x2ce0 [ 70.205074][ T9350] cont_write_begin+0x1000/0x1950 [ 70.205547][ T9350] hfsplus_write_begin+0x85/0x130 [ 70.206017][ T9350] generic_perform_write+0x3e8/0x1060 [ 70.206519][ T9350] __generic_file_write_iter+0x215/0x460 [ 70.207042][ T9350] generic_file_write_iter+0x109/0x5e0 [ 70.207552][ T9350] vfs_write+0xb0f/0x14e0 [ 70.207961][ T9350] ksys_write+0x23e/0x490 [ 70.208375][ T9350] __x64_sys_write+0x97/0xf0 [ 70.208810][ T9350] x64_sys_call+0x3015/0x3cf0 [ 70.209255][ T9350] do_syscall_64+0xd9/0x1d0 [ 70.209680][ T9350] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 70.210230][ T9350] [ 70

Affected

31 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.158-1 (bookworm)linux 6.1.158-1 (bookworm)
linuxlinux
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c1ec90bed504640a42bb20a5f413be39cd17ad71c1ec90bed504640a42bb20a5f413be39cd17ad71
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b8a72692aa42b7dcd179a96b90bc2763ac74576ab8a72692aa42b7dcd179a96b90bc2763ac74576a
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c135b8dca65526aa5b8814e9954e0ae317d9c598c135b8dca65526aa5b8814e9954e0ae317d9c598
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d7e313039a8f3a6ee072dc5ff4643234d2d735cfd7e313039a8f3a6ee072dc5ff4643234d2d735cf
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a5bfb13b4f406aef1a450f99d22d3e48df01528ca5bfb13b4f406aef1a450f99d22d3e48df01528c
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 99202d94909d323a30d154ab0261c0a07166daec99202d94909d323a30d154ab0261c0a07166daec
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 14c673a2f3ecf650b694a52a88688f1d7184989914c673a2f3ecf650b694a52a88688f1d71849899
linuxlinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4840ceadef4290c56cc422f0fc697655f3cbf0704840ceadef4290c56cc422f0fc697655f3cbf070
linuxlinux_kernel>= 0 < 5.10.247-15.10.247-1
linuxlinux_kernel>= 0 < 6.1.158-16.1.158-1
linuxlinux_kernel>= 0 < 6.12.57-16.12.57-1
linuxlinux_kernel>= 0 < 6.17.6-16.17.6-1
linuxlinux_kernel>= 0 < 5.15.0-170.1805.15.0-170.180
linuxlinux_kernel>= 0 < 6.8.0-106.1066.8.0-106.106
linuxlinux_kernel>= 0 < 6.17.0-14.146.17.0-14.14
linuxlinux_kernel>= 2.6.12 < 5.4.3015.4.301
linuxlinux_kernel>= 5.11.0 < 5.15.1965.15.196
linuxlinux_kernel>= 5.16.0 < 6.1.1586.1.158
linuxlinux_kernel>= 5.5.0 < 5.10.2465.10.246
linuxlinux_kernel>= 6.13.0 < 6.17.66.17.6
linuxlinux_kernel>= 6.2.0 < 6.6.1156.6.115
linuxlinux_kernel>= 6.7.0 < 6.12.566.12.56
msrcazl3_kernel_6.6.112.1-2_on_azure_linux_3.0

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_msrc9.8CRITICAL
vendor_ubuntu7.8HIGH
vendor_redhat4.7MEDIUM
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