CVE-2023-53820 (GCVE-0-2023-53820)
Vulnerability from cvelistv5 – Published: 2025-12-09 01:24 – Updated: 2025-12-23 16:39
VLAI?
Title
loop: loop_set_status_from_info() check before assignment
Summary
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
2035c770bfdbcc82bd52e05871a7c82db9529e0f , < 6bdf4e6dfb60cbb6121ccf027d97ed2ec97c0bcb
(git)
Affected: a217715338fd48f72114725aa7a40e484a781ca7 , < 832580af82ace363205039a8e7c4ef04552ccc1a (git) Affected: 13b2856037a651ba3ab4a8b25ecab3e791926da3 , < 2ea7077748e5d7cc64f1c31342c802fe66ea7426 (git) Affected: b40877b8562c5720d0a7fce20729f56b75a3dede , < 861021710bba9dfa0749a3c209a6c1773208b1f1 (git) Affected: 6858933131d0dadac071c4d33335a9ea4b8e76cf , < c79a924ed6afac1708dfd370ba66bcf6a852ced6 (git) Affected: 0455bef69028c65065f16bb04635591b2374249b , < 3e7d0968203d668af6036b9f9199c7b62c8a3581 (git) Affected: c490a0b5a4f36da3918181a8acdc6991d967c5f3 , < 4be26d553a3f1d4f54f25353d1496c562002126d (git) Affected: c490a0b5a4f36da3918181a8acdc6991d967c5f3 , < 258809bf22bf71d53247856f374f2b1d055f2fd4 (git) Affected: c490a0b5a4f36da3918181a8acdc6991d967c5f3 , < 9f6ad5d533d1c71e51bdd06a5712c4fbc8768dfa (git) Affected: 18e28817cb516b39de6281f6db9b0618b2cc7b42 (git) Affected: adf0112d9b8acb03485624220b4934f69bf13369 (git) Affected: 9be7fa7ead18a48940df7b59d993bbc8b9055c15 (git) |
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|
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{
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{
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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},
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"version": "0",
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},
{
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"version": "6.1.18",
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},
{
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"status": "unaffected",
"version": "6.2.5",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nloop: loop_set_status_from_info() check before assignment\n\nIn loop_set_status_from_info(), lo-\u003elo_offset and lo-\u003elo_sizelimit should\nbe checked before reassignment, because if an overflow error occurs, the\noriginal correct value will be changed to the wrong value, and it will not\nbe changed back.\n\nMore, the original patch did not solve the problem, the value was set and\nioctl returned an error, but the subsequent io used the value in the loop\ndriver, which still caused an alarm:\n\nloop_handle_cmd\n do_req_filebacked\n loff_t pos = ((loff_t) blk_rq_pos(rq) \u003c\u003c 9) + lo-\u003elo_offset;\n lo_rw_aio\n cmd-\u003eiocb.ki_pos = pos"
}
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/6bdf4e6dfb60cbb6121ccf027d97ed2ec97c0bcb"
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},
{
"url": "https://git.kernel.org/stable/c/9f6ad5d533d1c71e51bdd06a5712c4fbc8768dfa"
}
],
"title": "loop: loop_set_status_from_info() check before assignment",
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"cveId": "CVE-2023-53820",
"datePublished": "2025-12-09T01:24:29.417Z",
"dateReserved": "2025-12-08T23:58:35.278Z",
"dateUpdated": "2025-12-23T16:39:55.361Z",
"state": "PUBLISHED"
},
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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