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Fencer Vulns
medium 5.5

CVE-2022-49033 json

btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit()

published 2024-10-21 2 y ago modified 2026-06-17 4 mo ago also EUVD-2022-53917

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit()

Syzkaller reported BUG as follows:

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:274 Call Trace: <TASK> dump_stack_lvl+0xcd/0x134 __might_resched.cold+0x222/0x26b kmem_cache_alloc+0x2e7/0x3c0 update_qgroup_limit_item+0xe1/0x390 btrfs_qgroup_inherit+0x147b/0x1ee0 create_subvol+0x4eb/0x1710 btrfs_mksubvol+0xfe5/0x13f0 __btrfs_ioctl_snap_create+0x2b0/0x430 btrfs_ioctl_snap_create_v2+0x25a/0x520 btrfs_ioctl+0x2a1c/0x5ce0 __x64_sys_ioctl+0x193/0x200 do_syscall_64+0x35/0x80

Fix this by calling qgroup_dirty() on @dstqgroup, and update limit item in btrfs_run_qgroups() later outside of the spinlock context.

Patch / fix

  • Linux Linux 4.9.335, 4.14.301, 4.19.268, 5.4.226, 5.10.158, 5.15.82, 6.0.12, 6.1
  • linux Debian 14, Debian 13, Debian 12 6.0.12-1

debian advisories DEBIAN-CVE-2022-49033

  • linux Ubuntu 18.04 LTS 4.15.0-206.217
  • linux Ubuntu 20.04 LTS 5.4.0-144.161
  • linux Ubuntu 22.04 LTS 5.15.0-67.74
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1151.164
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1097.105
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1031.35
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1101.110
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1030.37

ubuntu advisories UBUNTU-CVE-2022-49033

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-64kb SLE High Performance Computing 15 SP5-ESPOS, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS 5.14.21-150500.55.91.1
  • kernel-syms SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5, SLES 15 SP5-LTSS +1 more 5.14.21-150500.55.91.1
  • kernel-source SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5, SLES 15 SP5-LTSS +1 more 5.14.21-150500.55.91.1
  • kernel-default SLE Micro 5.5, SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5 +3 more 5.14.21-150500.55.91.1
  • kernel-obs-build SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5, SLES 15 SP5-LTSS +1 more 5.14.21-150500.55.91.1
  • kernel-default-base SLE Micro 5.5, SLE High Performance Computing 15 SP5-ESPOS, SLES for SAP 15 SP5 +2 more 5.14.21-150500.55.91.1.150500.6.41.1
  • kernel-rt SLE Micro 5.5 5.14.21-150500.13.82.1
  • kernel-source-rt SLE Micro 5.5 5.14.21-150500.13.82.1

suse advisories SUSE-SU-2025:0201-1SUSE-SU-2025:0201-2SUSE-SU-2025:0236-1SUSE-SU-2025:0229-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-49033 updated cvss 5.5

kernel: btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit()

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.