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CVE-2023-53820— loop: loop_set_status_from_info() check before assignment

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，该漏洞源于未检查lo_offset和lo_sizelimit赋值，可能导致溢出错误。

AI Predicted 4.4 Difficulty: Hard EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

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Affected Version Matrix 28

VendorProduct Version RangeStatus
Linux Linux 2035c770bfdbcc82bd52e05871a7c82db9529e0f< 6bdf4e6dfb60cbb6121ccf027d97ed2ec97c0bcb affected
a217715338fd48f72114725aa7a40e484a781ca7< 832580af82ace363205039a8e7c4ef04552ccc1a affected
13b2856037a651ba3ab4a8b25ecab3e791926da3< 2ea7077748e5d7cc64f1c31342c802fe66ea7426 affected
b40877b8562c5720d0a7fce20729f56b75a3dede< 861021710bba9dfa0749a3c209a6c1773208b1f1 affected
6858933131d0dadac071c4d33335a9ea4b8e76cf< c79a924ed6afac1708dfd370ba66bcf6a852ced6 affected
0455bef69028c65065f16bb04635591b2374249b< 3e7d0968203d668af6036b9f9199c7b62c8a3581 affected
c490a0b5a4f36da3918181a8acdc6991d967c5f3< 4be26d553a3f1d4f54f25353d1496c562002126d affected
c490a0b5a4f36da3918181a8acdc6991d967c5f3< 258809bf22bf71d53247856f374f2b1d055f2fd4 affected
… +20 more rows
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I. Basic Information for CVE-2023-53820

Vulnerability Information
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Vulnerability Title
loop: loop_set_status_from_info() check before assignment
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: loop: loop_set_status_from_info() check before assignment In loop_set_status_from_info(), lo->lo_offset and lo->lo_sizelimit should be checked before reassignment, because if an overflow error occurs, the original correct value will be changed to the wrong value, and it will not be changed back. More, the original patch did not solve the problem, the value was set and ioctl returned an error, but the subsequent io used the value in the loop driver, which still caused an alarm: loop_handle_cmd do_req_filebacked loff_t pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; lo_rw_aio cmd->iocb.ki_pos = pos
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，该漏洞源于未检查lo_offset和lo_sizelimit赋值，可能导致溢出错误。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 2035c770bfdbcc82bd52e05871a7c82db9529e0f ~ 6bdf4e6dfb60cbb6121ccf027d97ed2ec97c0bcb -
Linux Linux 6.0 -

II. Public POCs for CVE-2023-53820

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III. Intelligence Information for CVE-2023-53820

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Same Patch Batch · Linux · 2025-12-09 · 152 CVEs total

CVE-2022-50666 9.8 CRITICAL RDMA/siw: Fix QP destroy to wait for all references dropped.
CVE-2025-40343 9.8 CRITICAL nvmet-fc: avoid scheduling association deletion twice
CVE-2023-53794 9.8 CRITICAL cifs: fix session state check in reconnect to avoid use-after-free issue
CVE-2025-40342 8.8 HIGH nvme-fc: use lock accessing port_state and rport state
CVE-2023-53822 8.8 HIGH wifi: ath11k: Ignore frags from uninitialized peer in dp.
CVE-2023-53785 8.8 HIGH mt76: mt7921: don't assume adequate headroom for SDIO headers
CVE-2025-40336 8.8 HIGH drm/gpusvm: fix hmm_pfn_to_map_order() usage
CVE-2023-53827 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
CVE-2025-40328 8.8 HIGH smb: client: fix potential UAF in smb2_close_cached_fid()
CVE-2023-53851 8.4 HIGH drm/msm/dp: Drop aux devices together with DP controller
CVE-2025-40337 8.2 HIGH net: stmmac: Correctly handle Rx checksum offload errors
CVE-2022-50656 8.1 HIGH nfc: pn533: Clear nfc_target before being used
CVE-2023-53803 8.1 HIGH scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
CVE-2023-53800 7.8 HIGH ubi: Fix use-after-free when volume resizing failed
CVE-2023-53860 7.8 HIGH dm: don't attempt to queue IO under RCU protection
CVE-2023-53829 7.8 HIGH f2fs: flush inode if atomic file is aborted
CVE-2023-53790 7.8 HIGH bpf: Zeroing allocated object from slab in bpf memory allocator
CVE-2023-53836 7.8 HIGH bpf, sockmap: Fix skb refcnt race after locking changes
CVE-2023-53844 7.8 HIGH drm/ttm: Don't leak a resource on swapout move error
CVE-2023-53846 7.8 HIGH f2fs: fix to do sanity check on direct node in truncate_dnode()

Showing top 20 of 152 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53820

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