CVE-2023-52566 (GCVE-0-2023-52566)
Vulnerability from cvelistv5 – Published: 2024-03-02 21:59 – Updated: 2026-05-11 19:29
VLAI
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-24 14:54 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| 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) |
guessed | |
| Linux | Linux |
Affected:
2.6.30
Unaffected: 0 , < 2.6.30 (semver) Unaffected: 4.14.327 , ≤ 4.14.* (semver) Unaffected: 4.19.296 , ≤ 4.19.* (semver) Unaffected: 5.4.258 , ≤ 5.4.* (semver) Unaffected: 5.10.198 , ≤ 5.10.* (semver) Unaffected: 5.15.134 , ≤ 5.15.* (semver) Unaffected: 6.1.56 , ≤ 6.1.* (semver) Unaffected: 6.5.6 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential use after free in nilfs_gccache_submit_read_data()\n\nIn nilfs_gccache_submit_read_data(), brelse(bh) is called to drop the\nreference count of bh when the call to nilfs_dat_translate() fails. 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]"
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{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nilfs2: soluciona el uso potencial despu\u00e9s de liberar en nilfs_gccache_submit_read_data() En nilfs_gccache_submit_read_data(), se llama a brelse(bh) para eliminar el recuento de referencias de bh cuando falla la llamada a nilfs_dat_translate(). Si el recuento de referencias llega a 0 y la p\u00e1gina del propietario se desbloquea, es posible que bh quede liberado. Sin embargo, se elimina la referencia a bh-\u0026gt;b_page para colocar la p\u00e1gina despu\u00e9s de eso, lo que puede provocar un error de Use After Free. Este parche mueve la operaci\u00f3n de lanzamiento despu\u00e9s de desbloquear y poner la p\u00e1gina. NOTA: La funci\u00f3n en cuesti\u00f3n solo se llama en GC y, en combinaci\u00f3n con las herramientas actuales del usuario, la traducci\u00f3n de direcciones usando DAT no ocurre en esa funci\u00f3n, por lo que la ruta del c\u00f3digo que causa este problema no se ejecutar\u00e1. Sin embargo, es posible ejecutar esa ruta de c\u00f3digo modificando intencionalmente la librer\u00eda GC del \u00e1rea de usuario o llamando directamente al GC ioctl. [konishi.ryusuke@gmail.com: NOTA agregada al registro de confirmaci\u00f3n]"
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.