fkie_cve-2021-47295
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2025-04-02 14:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: sched: fix memory leak in tcindex_partial_destroy_work
Syzbot reported memory leak in tcindex_set_parms(). The problem was in
non-freed perfect hash in tcindex_partial_destroy_work().
In tcindex_set_parms() new tcindex_data is allocated and some fields from
old one are copied to new one, but not the perfect hash. Since
tcindex_partial_destroy_work() is the destroy function for old
tcindex_data, we need to free perfect hash to avoid memory leak.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 5.14 | |
| linux | linux_kernel | 5.14 |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix memory leak in tcindex_partial_destroy_work\n\nSyzbot reported memory leak in tcindex_set_parms(). The problem was in\nnon-freed perfect hash in tcindex_partial_destroy_work().\n\nIn tcindex_set_parms() new tcindex_data is allocated and some fields from\nold one are copied to new one, but not the perfect hash. Since\ntcindex_partial_destroy_work() is the destroy function for old\ntcindex_data, we need to free perfect hash to avoid memory leak."
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"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: sched: corrige la p\u00e9rdida de memoria en tcindex_partial_destroy_work Syzbot inform\u00f3 una p\u00e9rdida de memoria en tcindex_set_parms(). El problema estaba en el hash perfecto no liberado en tcindex_partial_destroy_work(). En tcindex_set_parms() se asigna un nuevo tcindex_data y algunos campos del anterior se copian al nuevo, pero no el hash perfecto. Dado que tcindex_partial_destroy_work() es la funci\u00f3n de destrucci\u00f3n del antiguo tcindex_data, necesitamos liberar un hash perfecto para evitar p\u00e9rdidas de memoria."
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"id": "CVE-2021-47295",
"lastModified": "2025-04-02T14:47:33.430",
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"baseScore": 7.5,
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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