CVE-2024-27043 (GCVE-0-2024-27043)
Vulnerability from cvelistv5 – Published: 2024-05-01 12:54 – Updated: 2026-08-05 11:29
VLAI
EPSS
VEX
Title
media: edia: dvbdev: fix a use-after-free
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: edia: dvbdev: fix a use-after-free
In dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed
in several error-handling paths. However, *pdvbdev is not set to NULL
after dvbdev's deallocation, causing use-after-frees in many places,
for example, in the following call chain:
budget_register
|-> dvb_dmxdev_init
|-> dvb_register_device
|-> dvb_dmxdev_release
|-> dvb_unregister_device
|-> dvb_remove_device
|-> dvb_device_put
|-> kref_put
When calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in
dvb_register_device) could point to memory that had been freed in
dvb_register_device. Thereafter, this pointer is transferred to
kref_put and triggering a use-after-free.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-15 19:22 UTC
Assigner
References
11 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
b61901024776b25ce7b8edc31bb1757c7382a88e , < d0f5c28333822f9baa5280d813124920720fd856
(git)
Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < f20c3270f3ed5aa6919a87e4de9bf6c05fb57086 (git) Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < 096237039d00c839f3e3a5fe6d001bf0db45b644 (git) Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < 0d3fe80b6d175c220b3e252efc6c6777e700e98e (git) Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < 437a111f79a2f5b2a5f21e27fdec6f40c8768712 (git) Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < 779e8db7efb22316c8581d6c229636d2f5694a62 (git) Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < 35674111a043b0482a9bc69da8850a83f465b07d (git) Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < b7586e902128e4fb7bfbb661cb52e4215a65637b (git) Affected: b61901024776b25ce7b8edc31bb1757c7382a88e , < 8c64f4cdf4e6cc5682c52523713af8c39c94e6d5 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.21
Unaffected: 0 , < 2.6.21 (semver) Unaffected: 4.19.311 , ≤ 4.19.* (semver) Unaffected: 5.4.273 , ≤ 5.4.* (semver) Unaffected: 5.10.214 , ≤ 5.10.* (semver) Unaffected: 5.15.153 , ≤ 5.15.* (semver) Unaffected: 6.1.83 , ≤ 6.1.* (semver) Unaffected: 6.6.23 , ≤ 6.6.* (semver) Unaffected: 6.7.11 , ≤ 6.7.* (semver) Unaffected: 6.8.2 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix) |
guessed |
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"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable code is in dvb-core adapter registration, reached through local device probe/re-probe of a DVB adapter, with the error condition (kmalloc failure or DVB minor exhaustion) driven by a local unprivileged process inducing memory/resource pressure. No network or adjacent-network path exists, but the trigger does not require physical access on systems where a local user can force a re-probe of an already-present tuner.\nAC:L - There is no race the attacker must lose; the attacker controls both sides \u2014 memory pressure to force the GFP_KERNEL failure paths, and registration attempts to hit them, plus the deterministic MAX_DVB_MINORS exhaustion path under CONFIG_DVB_DYNAMIC_MINORS. Per the UAF guidance, a use-after-free with attacker-influenceable triggering conditions is Low.\nPR:L - A basic unprivileged local account suffices to generate the memory pressure that forces the error paths and to drive repeated registration attempts; no CAP_SYS_ADMIN or root in the init namespace is required to reach dvb-core\u0027s registration failure handling.\nUI:N - No victim action is needed \u2014 the attacker drives both the allocation failure and the device registration attempt themselves, and the stale pointer is consumed automatically by the driver\u0027s own error-unwind path.\nS:U - The corruption is confined to kernel heap and kernel static data within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The dangling struct dvb_device is dereferenced after free (dmxdev-\u003edvbdev-\u003eusers, -\u003ewait_queue, -\u003eminor), so heap-spray reallocation of that slab object gives the attacker control over the freed contents and, via the list_del unlink and wait-queue callback primitives, a route to arbitrary kernel memory disclosure.\nI:H - The use-after-free yields multiple write primitives: list_del() on freed memory is a classic write-what-where unlink, dvb_minors[dvbdev-\u003eminor] = NULL writes at an attacker-chosen offset from a static array, and kref_put() double-frees the object \u2014 collectively sufficient for control-flow hijack and privilege escalation.\nA:H - Even without full exploitation, dereferencing and kfree()ing already-freed memory reliably produces slab corruption, a double free, and out-of-bounds writes, resulting in kernel oops or panic."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T11:29:10.999Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d0f5c28333822f9baa5280d813124920720fd856"
},
{
"url": "https://git.kernel.org/stable/c/f20c3270f3ed5aa6919a87e4de9bf6c05fb57086"
},
{
"url": "https://git.kernel.org/stable/c/096237039d00c839f3e3a5fe6d001bf0db45b644"
},
{
"url": "https://git.kernel.org/stable/c/0d3fe80b6d175c220b3e252efc6c6777e700e98e"
},
{
"url": "https://git.kernel.org/stable/c/437a111f79a2f5b2a5f21e27fdec6f40c8768712"
},
{
"url": "https://git.kernel.org/stable/c/779e8db7efb22316c8581d6c229636d2f5694a62"
},
{
"url": "https://git.kernel.org/stable/c/35674111a043b0482a9bc69da8850a83f465b07d"
},
{
"url": "https://git.kernel.org/stable/c/b7586e902128e4fb7bfbb661cb52e4215a65637b"
},
{
"url": "https://git.kernel.org/stable/c/8c64f4cdf4e6cc5682c52523713af8c39c94e6d5"
}
],
"title": "media: edia: dvbdev: fix a use-after-free",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-27043",
"datePublished": "2024-05-01T12:54:11.197Z",
"dateReserved": "2024-02-19T14:20:24.212Z",
"dateUpdated": "2026-08-05T11:29:10.999Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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.
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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.
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