Skip to main content

Boteraser | Website and Server Security Solutions

🛡️ CVE-2023-54032 — kernel

⚪ Unknown ✅ No Known Exploit NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

btrfs: fix race when deleting quota root from the dirty cow roots list

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

btrfs: fix race when deleting quota root from the dirty cow roots list

When disabling quotas we are deleting the quota root from the list

fs_info->dirty_cowonly_roots without taking the lock that protects it,

which is struct btrfs_fs_info::trans_lock. This unsynchronized list

manipulation may cause chaos if there's another concurrent manipulation

of this list, such as when adding a root to it with

ctree.c:add_root_to_dirty_list().

This can result in all sorts of weird failures caused by a race, such as

the following crash:

[337571.278245] general protection fault, probably for non-canonical address 0xdead000000000108: 0000 [#1] PREEMPT SMP PTI

[337571.278933] CPU: 1 PID: 115447 Comm: btrfs Tainted: G W 6.4.0-rc6-btrfs-next-134+ #1

[337571.279153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014

[337571.279572] RIP: 0010:commit_cowonly_roots+0x11f/0x250 [btrfs]

[337571.279928] Code: 85 38 06 00 (...)

[337571.280363] RSP: 0018:ffff9f63446efba0 EFLAGS: 00010206

[337571.280582] RAX: ffff942d98ec2638 RBX: ffff9430b82b4c30 RCX: 0000000449e1c000

[337571.280798] RDX: dead000000000100 RSI: ffff9430021e4900 RDI: 0000000000036070

[337571.281015] RBP: ffff942d98ec2000 R08: ffff942d98ec2000 R09: 000000000000015b

[337571.281254] R10: 0000000000000009 R11: 0000000000000001 R12: ffff942fe8fbf600

[337571.281476] R13: ffff942dabe23040 R14: ffff942dabe20800 R15: ffff942d92cf3b48

[337571.281723] FS: 00007f478adb7340(0000) GS:ffff94349fa40000(0000) knlGS:0000000000000000

[337571.281950] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[337571.282184] CR2: 00007f478ab9a3d5 CR3: 000000001e02c001 CR4: 0000000000370ee0

[337571.282416] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[337571.282647] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[337571.282874] Call Trace:

[337571.283101] <TASK>

[337571.283327] ? __die_body+0x1b/0x60

[337571.283570] ? die_addr+0x39/0x60

[337571.283796] ? exc_general_protection+0x22e/0x430

[337571.284022] ? asm_exc_general_protection+0x22/0x30

[337571.284251] ? commit_cowonly_roots+0x11f/0x250 [btrfs]

[337571.284531] btrfs_commit_transaction+0x42e/0xf90 [btrfs]

[337571.284803] ? _raw_spin_unlock+0x15/0x30

[337571.285031] ? release_extent_buffer+0x103/0x130 [btrfs]

[337571.285305] reset_balance_state+0x152/0x1b0 [btrfs]

[337571.285578] btrfs_balance+0xa50/0x11e0 [btrfs]

[337571.285864] ? __kmem_cache_alloc_node+0x14a/0x410

[337571.286086] btrfs_ioctl+0x249a/0x3320 [btrfs]

[337571.286358] ? mod_objcg_state+0xd2/0x360

[337571.286577] ? refill_obj_stock+0xb0/0x160

[337571.286798] ? seq_release+0x25/0x30

[337571.287016] ? __rseq_handle_notify_resume+0x3ba/0x4b0

[337571.287235] ? percpu_counter_add_batch+0x2e/0xa0

[337571.287455] ? __x64_sys_ioctl+0x88/0xc0

[337571.287675] __x64_sys_ioctl+0x88/0xc0

[337571.287901] do_syscall_64+0x38/0x90

[337571.288126] entry_SYSCALL_64_after_hwframe+0x72/0xdc

[337571.288352] RIP: 0033:0x7f478aaffe9b

So fix this by locking struct btrfs_fs_info::trans_lock before deleting

the quota root from that list.

Affected software

CVE-2023-54032 is recorded against 2 packages.

  • kernel (from 6.2.0 up to 6.4.4)
  • unknown

Timeline and source

Published on 24 December 2025 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2023-54032 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-12-24
Updated 2026-08-20
Modified 2026-08-12
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.2.0 6.4.4
unknown — —

References

Similar Threats

Free Vulnerability Check

Is your site affected by CVE-2023-54032?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against CVE-2023-54032 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2023
✓