GHSA-VGJ5-HQJJ-6HCJ
Vulnerability from github – Published: 2024-08-17 12:30 – Updated: 2025-11-04 00:31
VLAI
Details
In the Linux kernel, the following vulnerability has been resolved:
virtio_net: Fix napi_skb_cache_put warning
After the commit bdacf3e34945 ("net: Use nested-BH locking for napi_alloc_cache.") was merged, the following warning began to appear:
WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0
__warn+0x12f/0x340
napi_skb_cache_put+0x82/0x4b0
napi_skb_cache_put+0x82/0x4b0
report_bug+0x165/0x370
handle_bug+0x3d/0x80
exc_invalid_op+0x1a/0x50
asm_exc_invalid_op+0x1a/0x20
__free_old_xmit+0x1c8/0x510
napi_skb_cache_put+0x82/0x4b0
__free_old_xmit+0x1c8/0x510
__free_old_xmit+0x1c8/0x510
__pfx___free_old_xmit+0x10/0x10
The issue arises because virtio is assuming it's running in NAPI context even when it's not, such as in the netpoll case.
To resolve this, modify virtnet_poll_tx() to only set NAPI when budget is available. Same for virtnet_poll_cleantx(), which always assumed that it was in a NAPI context.
Severity
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2024-43835"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-17T10:15:09Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: Fix napi_skb_cache_put warning\n\nAfter the commit bdacf3e34945 (\"net: Use nested-BH locking for\nnapi_alloc_cache.\") was merged, the following warning began to appear:\n\n\t WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0\n\n\t __warn+0x12f/0x340\n\t napi_skb_cache_put+0x82/0x4b0\n\t napi_skb_cache_put+0x82/0x4b0\n\t report_bug+0x165/0x370\n\t handle_bug+0x3d/0x80\n\t exc_invalid_op+0x1a/0x50\n\t asm_exc_invalid_op+0x1a/0x20\n\t __free_old_xmit+0x1c8/0x510\n\t napi_skb_cache_put+0x82/0x4b0\n\t __free_old_xmit+0x1c8/0x510\n\t __free_old_xmit+0x1c8/0x510\n\t __pfx___free_old_xmit+0x10/0x10\n\nThe issue arises because virtio is assuming it\u0027s running in NAPI context\neven when it\u0027s not, such as in the netpoll case.\n\nTo resolve this, modify virtnet_poll_tx() to only set NAPI when budget\nis available. Same for virtnet_poll_cleantx(), which always assumed that\nit was in a NAPI context.",
"id": "GHSA-vgj5-hqjj-6hcj",
"modified": "2025-11-04T00:31:15Z",
"published": "2024-08-17T12:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43835"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Loading…
Loading…
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.
Loading…
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.
Loading…
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.
Loading…