CVE-2025-21846— acct: perform last write from workqueue
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8acbf4a88c6a98c8ed00afd1a7d1abcca9b4735e | affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b03782ae707cc45e65242c7cddd8e28f1c22cde5 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5d5b936cfa4b0d5670ca7420ef165a074bc008eb | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5ee8da9bea70dda492d61f075658939af33d8410 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5c928e14a2ccd99462f2351ead627b58075bb736 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 5a59ced8ffc71973d42c82484a719c8f6ac8f7f7 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a8136afca090412a36429cb6c2543c714d9c0f84 | affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 56d5f3eba3f5de0efdd556de4ef381e109b973a9 | affected | ||
| … +10 more rows | |||
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2025-21846
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
acct: perform last write from workqueue
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: acct: perform last write from workqueue In [1] it was reported that the acct(2) system call can be used to trigger NULL deref in cases where it is set to write to a file that triggers an internal lookup. This can e.g., happen when pointing acc(2) to /sys/power/resume. At the point the where the write to this file happens the calling task has already exited and called exit_fs(). A lookup will thus trigger a NULL-deref when accessing current->fs. Reorganize the code so that the the final write happens from the workqueue but with the caller's credentials. This preserves the (strange) permission model and has almost no regression risk. This api should stop to exist though.
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acct系统调用可能导致空指针取消引用。
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
II. Public POCs for CVE-2025-21846
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2025-21846
请登录查看更多情报信息。
Same Patch Batch · Linux · 2025-03-12 · 26 CVEs total
| CVE-2025-21855 | ibmvnic: Don't reference skb after sending to VIOS | |
| CVE-2024-58087 | ksmbd: fix racy issue from session lookup and expire | |
| CVE-2024-58088 | bpf: Fix deadlock when freeing cgroup storage | |
| CVE-2024-58089 | btrfs: fix double accounting race when btrfs_run_delalloc_range() failed | |
| CVE-2025-21844 | smb: client: Add check for next_buffer in receive_encrypted_standard() | |
| CVE-2025-21845 | mtd: spi-nor: sst: Fix SST write failure | |
| CVE-2025-21848 | nfp: bpf: Add check for nfp_app_ctrl_msg_alloc() | |
| CVE-2025-21847 | ASoC: SOF: stream-ipc: Check for cstream nullity in sof_ipc_msg_data() | |
| CVE-2025-21849 | drm/i915/gt: Use spin_lock_irqsave() in interruptible context | |
| CVE-2025-21851 | bpf: Fix softlockup in arena_map_free on 64k page kernel | |
| CVE-2025-21850 | nvmet: Fix crash when a namespace is disabled | |
| CVE-2025-21852 | net: Add rx_skb of kfree_skb to raw_tp_null_args[]. | |
| CVE-2025-21853 | bpf: avoid holding freeze_mutex during mmap operation | |
| CVE-2025-21866 | powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC | |
| CVE-2025-21854 | sockmap, vsock: For connectible sockets allow only connected | |
| CVE-2025-21856 | s390/ism: add release function for struct device | |
| CVE-2025-21857 | net/sched: cls_api: fix error handling causing NULL dereference | |
| CVE-2025-21858 | geneve: Fix use-after-free in geneve_find_dev(). | |
| CVE-2025-21859 | USB: gadget: f_midi: f_midi_complete to call queue_work | |
| CVE-2025-21861 | mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize() |
Showing top 20 of 26 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
V. Comments for CVE-2025-21846
No comments yet