CVE-2025-38451: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: md/md-bitmap: fix GPF in bitmap_get_stats() The commit message of commit 6ec1f0239485 ("md/md-bitmap: fix stats collection for external bitmaps") states: Remove the external bitmap check as the statistics should be available regardless of bitmap storage location. Return -EINVAL only for invalid bitmap with no storage (neither in superblock nor in external file). But, the code does not adhere to the above, as it does only check for a valid super-block for "internal" bitmaps. Hence, we observe: Oops: GPF, probably for non-canonical address 0x1cd66f1f40000028 RIP: 0010:bitmap_get_stats+0x45/0xd0 Call Trace: seq_read_iter+0x2b9/0x46a seq_read+0x12f/0x180 proc_reg_read+0x57/0xb0 vfs_read+0xf6/0x380 ksys_read+0x6d/0xf0 do_syscall_64+0x8c/0x1b0 entry_SYSCALL_64_after_hwframe+0x76/0x7e We fix this by checking the existence of a super-block for both the internal and external case.

Affected products

• Debian Debian Linux: version 11.0 only
• Linux Linux Kernel: from 6.1.135, before 6.1.146 (fixed in 6.1.146); from 6.6.88, before 6.6.99 (fixed in 6.6.99); from 6.12.25, before 6.12.39 (fixed in 6.12.39); from 6.14.4, before 6.15 (fixed in 6.15); from 6.15.1, before 6.15.7 (fixed in 6.15.7); version 6.15 only; …

Published 2025-07-25. Last modified 2026-06-17.