CVE-2022-50299— md: Replace snprintf with scnprintf
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于使用snprintf可能导致缓冲区溢出，应使用scnprintf替代。
Possible ATT&CK Techniques 1 AI
T1200 · Hardware AdditionsAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 766038846e875740cf4c20dfc5d5b292ba47360a< 3b0a2bd51f60418ecd67493586a2bb2174199de3 |
affected |
766038846e875740cf4c20dfc5d5b292ba47360a< 897b1450abe5a67c842a5d24173ce4449ccdfa94 |
affected | ||
766038846e875740cf4c20dfc5d5b292ba47360a< 97238b88583c27c9d3b4a0cedb45f816523f17c3 |
affected | ||
766038846e875740cf4c20dfc5d5b292ba47360a< 76694e9ce0b2238c0a5f3ba54f9361dd3770ec78 |
affected | ||
766038846e875740cf4c20dfc5d5b292ba47360a< 5d8259c9d1915a50c60c7d6e9e7fb9b7da64a175 |
affected | ||
766038846e875740cf4c20dfc5d5b292ba47360a< 41ca95033a0c47cd6dace1f0a36a6eb5ebe799e6 |
affected | ||
766038846e875740cf4c20dfc5d5b292ba47360a< f95825c4e51cf9a653b0ef947ac78401fc9d3a40 |
affected | ||
766038846e875740cf4c20dfc5d5b292ba47360a< 1727fd5015d8f93474148f94e34cda5aa6ad4a43 |
affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2022-50299
Vulnerability Information
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Vulnerability Title
md: Replace snprintf with scnprintf
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于使用snprintf可能导致缓冲区溢出，应使用scnprintf替代。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2022-50299
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total
| CVE-2022-50235 | 9.8 CRITICAL | NFSD: Protect against send buffer overflow in NFSv2 READDIR |
| CVE-2022-50335 | 9.8 CRITICAL | 9p: set req refcount to zero to avoid uninitialized usage |
| CVE-2023-53192 | 9.8 CRITICAL | vxlan: Fix nexthop hash size |
| CVE-2023-53253 | 8.8 HIGH | HID: nvidia-shield: Reference hid_device devm allocation of input_dev name |
| CVE-2023-53226 | 8.8 HIGH | wifi: mwifiex: Fix OOB and integer underflow when rx packets |
| CVE-2022-50241 | 8.8 HIGH | NFSD: fix use-after-free on source server when doing inter-server copy |
| CVE-2023-53194 | 8.4 HIGH | fs/ntfs3: Add length check in indx_get_root |
| CVE-2023-53213 | 8.1 HIGH | wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies() |
| CVE-2023-53186 | 8.1 HIGH | skbuff: Fix a race between coalescing and releasing SKBs |
| CVE-2022-50310 | 7.8 HIGH | ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed |
| CVE-2023-53254 | 7.8 HIGH | cacheinfo: Fix shared_cpu_map to handle shared caches at different levels |
| CVE-2023-53252 | 7.8 HIGH | Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync |
| CVE-2023-53170 | 7.8 HIGH | net: dsa: Removed unneeded of_node_put in felix_parse_ports_node |
| CVE-2023-53176 | 7.8 HIGH | serial: 8250: Reinit port->pm on port specific driver unbind |
| CVE-2023-53178 | 7.8 HIGH | mm: fix zswap writeback race condition |
| CVE-2023-53179 | 7.8 HIGH | netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c |
| CVE-2023-53184 | 7.8 HIGH | arm64/sme: Set new vector length before reallocating |
| CVE-2022-50315 | 7.8 HIGH | ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS |
| CVE-2023-53187 | 7.8 HIGH | btrfs: fix use-after-free of new block group that became unused |
| CVE-2025-39800 | 7.8 HIGH | btrfs: abort transaction on unexpected eb generation at btrfs_copy_root() |
Showing top 20 of 210 CVEs. View all on vendor page → →
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V. Comments for CVE-2022-50299
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