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CVE-2022-50379— btrfs: fix race between quota enable and quota rescan ioctl

EPSS 0.01% · P1

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinux5d23515be66904fa3b1b5d6bd72d2199cd2447ab< c97f6d528c3f1c83a6b792a8a7928c236c80b8feaffected
5d23515be66904fa3b1b5d6bd72d2199cd2447ab< 26b7c0ac49a3eea15559c9d84863736a6d1164b4affected
5d23515be66904fa3b1b5d6bd72d2199cd2447ab< 47b5ffe86332af95f0f52be0a63d4da7c2b37b55affected
5d23515be66904fa3b1b5d6bd72d2199cd2447ab< 4b996a3014ef014af8f97b60c35f5289210a4720affected
5d23515be66904fa3b1b5d6bd72d2199cd2447ab< 0efd9dfc00d677a1d0929319a6103cb2dfc41c22affected
5d23515be66904fa3b1b5d6bd72d2199cd2447ab< 6c22f86dd221eba0c7af645b1af73dcbc04ee27baffected
5d23515be66904fa3b1b5d6bd72d2199cd2447ab< 331cd9461412e103d07595a10289de90004ac890affected
4.17affected
… +8 more rows
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I. Basic Information for CVE-2022-50379

Vulnerability Information
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Vulnerability Title
btrfs: fix race between quota enable and quota rescan ioctl
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix race between quota enable and quota rescan ioctl When enabling quotas, at btrfs_quota_enable(), after committing the transaction, we change fs_info->quota_root to point to the quota root we created and set BTRFS_FS_QUOTA_ENABLED at fs_info->flags. Then we try to start the qgroup rescan worker, first by initializing it with a call to qgroup_rescan_init() - however if that fails we end up freeing the quota root but we leave fs_info->quota_root still pointing to it, this can later result in a use-after-free somewhere else. We have previously set the flags BTRFS_FS_QUOTA_ENABLED and BTRFS_QGROUP_STATUS_FLAG_ON, so we can only fail with -EINPROGRESS at btrfs_quota_enable(), which is possible if someone already called the quota rescan ioctl, and therefore started the rescan worker. So fix this by ignoring an -EINPROGRESS and asserting we can't get any other error.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于配额启用和配额重新扫描ioctl之间存在竞争条件，可能导致释放后重用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 5d23515be66904fa3b1b5d6bd72d2199cd2447ab ~ c97f6d528c3f1c83a6b792a8a7928c236c80b8fe -
LinuxLinux 4.17 -

II. Public POCs for CVE-2022-50379

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III. Intelligence Information for CVE-2022-50379

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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total

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CVE-2022-50406iomap: iomap: fix memory corruption when recording errors during writeback
CVE-2022-50404fbdev: fbcon: release buffer when fbcon_do_set_font() failed
CVE-2023-53410USB: ULPI: fix memory leak with using debugfs_lookup()
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CVE-2023-53412USB: gadget: bcm63xx_udc: fix memory leak with using debugfs_lookup()
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Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50379

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