CVE-2022-50299

md: Replace snprintf with scnprintf

MEDIUM

5.5

CVSS Score

Published: September 15, 2025 at 02:45 PM UTC

Updated: June 17, 2026 at 05:23 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.10 ≤ v < 4.14.2964.10 ≤ v < 4.19.2624.10 ≤ v < 5.10.1504.10 ≤ v < 5.15.754.10 ≤ v < 5.19.174.10 ≤ v < 5.4.2204.10 ≤ v < 6.0.34.10 ≤ v < 6.14.15 ≤ v < 4.19.2624.20 ≤ v < 5.4.2205.11 ≤ v < 5.15.755.16 ≤ v < 5.19.175.5 ≤ v < 5.10.1506.0 ≤ v < 6.0.34.10766038846e875740cf4c20dfc5d5b292ba47360a

Vendor states this is fixed in 1727fd5015d8f93474148f94e34cda5aa6ad4a43 (fixed)

Vendor states this is fixed in 3b0a2bd51f60418ecd67493586a2bb2174199de3 (fixed)

Vendor states this is fixed in 41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6 (fixed)

Vendor states this is fixed in 5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175 (fixed)

Vendor states this is fixed in 76694e9ce0b2238c0a5f3ba54f9361dd3770ec78 (fixed)

Vendor states this is fixed in 897b1450abe5a67c842a5d24173ce4449ccdfa94 (fixed)

Vendor states this is fixed in 97238b88583c27c9d3b4a0cedb45f816523f17c3 (fixed)

Vendor states this is fixed in f95825c4e51cf9a653b0ef947ac78401fc9d3a40 (fixed)

Vendor states this is fixed in 4.10 (unaffected)

Vendor states this is fixed in 4.14.296 (unaffected)

Vendor states this is fixed in 4.19.262 (unaffected)

Vendor states this is fixed in 5.10.150 (unaffected)