CVE-2025-37902

In the Linux kernel, the following vulnerability has been resolved:

dm: fix copying after src array boundaries

The blammed commit copied to argv the size of the reallocated argv, instead of the size of the old_argv, thus reading and copying from past the old_argv allocated memory.

Following BUG_ON was hit: [ 3.038929][ T1] kernel BUG at lib/string_helpers.c:1040! [ 3.039147][ T1] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP … [ 3.056489][ T1] Call trace: [ 3.056591][ T1] __fortify_panic+0x10/0x18 (P) [ 3.056773][ T1] dm_split_args+0x20c/0x210 [ 3.056942][ T1] dm_table_add_target+0x13c/0x360 [ 3.057132][ T1] table_load+0x110/0x3ac [ 3.057292][ T1] dm_ctl_ioctl+0x424/0x56c [ 3.057457][ T1] __arm64_sys_ioctl+0xa8/0xec [ 3.057634][ T1] invoke_syscall+0x58/0x10c [ 3.057804][ T1] el0_svc_common+0xa8/0xdc [ 3.057970][ T1] do_el0_svc+0x1c/0x28 [ 3.058123][ T1] el0_svc+0x50/0xac [ 3.058266][ T1] el0t_64_sync_handler+0x60/0xc4 [ 3.058452][ T1] el0t_64_sync+0x1b0/0x1b4 [ 3.058620][ T1] Code: f800865e a9bf7bfd 910003fd 941f48aa (d4210000) [ 3.058897][ T1] —[ end trace 0000000000000000 ]— [ 3.059083][ T1] Kernel panic - not syncing: Oops - BUG: Fatal exception

Fix it by copying the size of src, and not the size of dst, as it was.

Affected Software

References

• https://git.kernel.org/stable/c/4c4f168b46229d527bda801ef15ad793b069f0ae
• https://git.kernel.org/stable/c/a27cbadb995fa4cca90cefd74332c55c2c26616b
• https://git.kernel.org/stable/c/aaa763ab8cecae6308c5ec7f309e1bc3a7ebd29f
• https://git.kernel.org/stable/c/db62809197658954a67b446c30677bc25baaf9f3
• https://git.kernel.org/stable/c/ed3248a403740a623c73afd95f88cc37e0cd3ad2
• https://git.kernel.org/stable/c/f1aff4bc199cb92c055668caed65505e3b4d2656