In the Linux kernel, the following vulnerability has been resolved:
md: Replace snprintf with scnprintf
Current code produces a warning as shown below when total characters in the constituent block device names plus the slashes exceeds 200. snprintf() returns the number of characters generated from the given input, which could cause the expression “200 – len” to wrap around to a large positive number. Fix this by using scnprintf() instead, which returns the actual number of characters written into the buffer.
[ 1513.267938] ------------[ cut here ]------------ [ 1513.267943] WARNING: CPU: 15 PID: 37247 at <snip>/lib/vsprintf.c:2509 vsnprintf+0x2c8/0x510 [ 1513.267944] Modules linked in: <snip> [ 1513.267969] CPU: 15 PID: 37247 Comm: mdadm Not tainted 5.4.0-1085-azure #90~18.04.1-Ubuntu [ 1513.267969] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022 [ 1513.267971] RIP: 0010:vsnprintf+0x2c8/0x510 <-snip-> [ 1513.267982] Call Trace: [ 1513.267986] snprintf+0x45/0x70 [ 1513.267990] ? disk_name+0x71/0xa0 [ 1513.267993] dump_zones+0x114/0x240 [raid0] [ 1513.267996] ? _cond_resched+0x19/0x40 [ 1513.267998] raid0_run+0x19e/0x270 [raid0] [ 1513.268000] md_run+0x5e0/0xc50 [ 1513.268003] ? security_capable+0x3f/0x60 [ 1513.268005] do_md_run+0x19/0x110 [ 1513.268006] md_ioctl+0x195e/0x1f90 [ 1513.268007] blkdev_ioctl+0x91f/0x9f0 [ 1513.268010] block_ioctl+0x3d/0x50 [ 1513.268012] do_vfs_ioctl+0xa9/0x640 [ 1513.268014] ? __fput+0x162/0x260 [ 1513.268016] ksys_ioctl+0x75/0x80 [ 1513.268017] __x64_sys_ioctl+0x1a/0x20 [ 1513.268019] do_syscall_64+0x5e/0x200 [ 1513.268021] entry_SYSCALL_64_after_hwframe+0x44/0xa9
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftoolUpgrade perf-debuginfoUpgrade perfUpgrade kernel-livepatch-4.14.296-222.539Upgrade python-perfUpgrade kernel-livepatch-5.15.75-48.135Upgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernelUpgrade kernel-headersUpgrade kernel-develUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.10.155-138.670Upgrade kernel-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-tools-libsUpgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perf | Jan 15, 2026 | Jan 13, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade python3-perfUpgrade kernelUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-abi-stablelists | Feb 3, 2026 | Jan 30, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 15, 2025 |
| Ubuntu | — | Upgrade linux-raspiUpgrade linux-bluefieldUpgrade linux-fipsUpgrade linux-riscv-5.15Upgrade linux-awsUpgrade linux-aws-hweUpgrade linux-realtimeUpgrade linux-oracle-5.4Upgrade linux-aws-5.15Upgrade linux-raspi-5.4Upgrade linux-lowlatencyUpgrade linuxUpgrade linux-ibm-5.4Upgrade linux-aws-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-gkeUpgrade linux-oracle-5.15Upgrade linux-hweUpgrade linux-hwe-5.4Upgrade linux-gcp-5.4Upgrade linux-hwe-5.15Upgrade linux-azure-5.15Upgrade linux-gcp-5.15Upgrade linux-gcp-4.15Upgrade linux-azureUpgrade linux-oracleUpgrade linux-aws-fipsUpgrade linux-gcp-fipsUpgrade linux-intel-iotgUpgrade linux-azure-fipsUpgrade linux-gcpUpgrade linux-azure-4.15Upgrade linux-intel-iotg-5.15Upgrade linux-azure-5.4Upgrade linux-ibmUpgrade linux-nvidiaUpgrade linux-kvmUpgrade linux-gkeopUpgrade linux-iot | Sep 19, 2025 | Sep 16, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Sep 15, 2025 |
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