CVE-2023-52566 (GCVE-0-2023-52566)
Vulnerability from cvelistv5 – Published: 2024-03-02 21:59 – Updated: 2025-05-04 07:38
VLAI?
Title
nilfs2: fix potential use after free in nilfs_gccache_submit_read_data()
Summary
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix potential use after free in nilfs_gccache_submit_read_data()
In nilfs_gccache_submit_read_data(), brelse(bh) is called to drop the
reference count of bh when the call to nilfs_dat_translate() fails. If
the reference count hits 0 and its owner page gets unlocked, bh may be
freed. However, bh->b_page is dereferenced to put the page after that,
which may result in a use-after-free bug. This patch moves the release
operation after unlocking and putting the page.
NOTE: The function in question is only called in GC, and in combination
with current userland tools, address translation using DAT does not occur
in that function, so the code path that causes this issue will not be
executed. However, it is possible to run that code path by intentionally
modifying the userland GC library or by calling the GC ioctl directly.
[konishi.ryusuke@gmail.com: NOTE added to the commit log]
Severity ?
5.5 (Medium)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
a3d93f709e893187d301aa5458b2248db9f22bd1 , < fb1084e63ee56958b0a56e17a50a4fd86445b9c1
(git)
Affected: a3d93f709e893187d301aa5458b2248db9f22bd1 , < bb61224f6abc8e71bfdf06d7c984e23460875f5b (git) Affected: a3d93f709e893187d301aa5458b2248db9f22bd1 , < 193b5a1c6c67c36b430989dc063fe7ea4e200a33 (git) Affected: a3d93f709e893187d301aa5458b2248db9f22bd1 , < 7130a87ca32396eb9bf48b71a2d42259ae44c6c7 (git) Affected: a3d93f709e893187d301aa5458b2248db9f22bd1 , < 3936e8714907cd55e37c7cc50e50229e4a9042e8 (git) Affected: a3d93f709e893187d301aa5458b2248db9f22bd1 , < 980663f1d189eedafd18d80053d9cf3e2ceb5c8c (git) Affected: a3d93f709e893187d301aa5458b2248db9f22bd1 , < 28df4646ad8b433340772edc90ca709cdefc53e2 (git) Affected: a3d93f709e893187d301aa5458b2248db9f22bd1 , < 7ee29facd8a9c5a26079148e36bcf07141b3a6bc (git) |
|||||||
|
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If\\nthe reference count hits 0 and its owner page gets unlocked, bh may be\\nfreed. However, bh-\u003eb_page is dereferenced to put the page after that,\\nwhich may result in a use-after-free bug. This patch moves the release\\noperation after unlocking and putting the page.\\n\\nNOTE: The function in question is only called in GC, and in combination\\nwith current userland tools, address translation using DAT does not occur\\nin that function, so the code path that causes this issue will not be\\nexecuted. However, it is possible to run that code path by intentionally\\nmodifying the userland GC library or by calling the GC ioctl directly.\\n\\n[konishi.ryusuke@gmail.com: NOTE added to the commit log]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.327\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.296\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.258\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.198\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.134\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.56\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.6\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6\", \"versionStartIncluding\": \"2.6.30\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:38:53.975Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-52566\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:38:53.975Z\", \"dateReserved\": \"2024-03-02T21:55:42.567Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-02T21:59:38.167Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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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