CVE-2022-50299
md: Replace snprintf with scnprintf
- Published
- Updated
- Reserved
- Assigned by
- Linux
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
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < 3b0a2bd51f60418ecd67493586a2bb2174199de3
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < 897b1450abe5a67c842a5d24173ce4449ccdfa94
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < 97238b88583c27c9d3b4a0cedb45f816523f17c3
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < 76694e9ce0b2238c0a5f3ba54f9361dd3770ec78
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < 5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < 41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < f95825c4e51cf9a653b0ef947ac78401fc9d3a40
- affected 766038846e875740cf4c20dfc5d5b292ba47360a – < 1727fd5015d8f93474148f94e34cda5aa6ad4a43
- affected 4.10
- unaffected < 4.10
- unaffected 4.14.296 – ≤ 4.14.*
- unaffected 4.19.262 – ≤ 4.19.*
- unaffected 5.4.220 – ≤ 5.4.*
- unaffected 5.10.150 – ≤ 5.10.*
- unaffected 5.15.75 – ≤ 5.15.*
- unaffected 5.19.17 – ≤ 5.19.*
- unaffected 6.0.3 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (8)
- https://git.kernel.org/stable/c/3b0a2bd51f60418ecd67493586a2bb2174199de3 (opens in a new tab)
- https://git.kernel.org/stable/c/897b1450abe5a67c842a5d24173ce4449ccdfa94 (opens in a new tab)
- https://git.kernel.org/stable/c/97238b88583c27c9d3b4a0cedb45f816523f17c3 (opens in a new tab)
- https://git.kernel.org/stable/c/76694e9ce0b2238c0a5f3ba54f9361dd3770ec78 (opens in a new tab)
- https://git.kernel.org/stable/c/5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175 (opens in a new tab)
- https://git.kernel.org/stable/c/41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6 (opens in a new tab)
- https://git.kernel.org/stable/c/f95825c4e51cf9a653b0ef947ac78401fc9d3a40 (opens in a new tab)
- https://git.kernel.org/stable/c/1727fd5015d8f93474148f94e34cda5aa6ad4a43 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50299)Record last updated .