CVE-2026-23206 (GCVE-0-2026-23206)
Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-14 16:27
VLAI?
Title
dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero
Summary
In the Linux kernel, the following vulnerability has been resolved:
dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero
The driver allocates arrays for ports, FDBs, and filter blocks using
kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the
device reports zero interfaces (either due to hardware configuration
or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10)
instead of NULL.
Later in dpaa2_switch_probe(), the NAPI initialization unconditionally
accesses ethsw->ports[0]->netdev, which attempts to dereference
ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.
Add a check to ensure num_ifs is greater than zero after retrieving
device attributes. This prevents the zero-sized allocations and
subsequent invalid pointer dereference.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
0b1b71370458860579831e77485883fcf2e8fbbe , < 2fcccca88456b592bd668db13aa1d29ed257ca2b
(git)
Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < 80165ff16051448d6f840585ebe13f2400415df3 (git) Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < b97415c4362f739e25ec6f71012277086fabdf6f (git) Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < 4acc40db06ffd0fd92683505342b00c8a7394c60 (git) Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < 155eb99aff2920153bf21217ae29565fff81e6af (git) Affected: 0b1b71370458860579831e77485883fcf2e8fbbe , < ed48a84a72fefb20a82dd90a7caa7807e90c6f66 (git) |
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{
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"
],
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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{
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"status": "unaffected",
"version": "6.1.163",
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{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.124",
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},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.70",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero\n\nThe driver allocates arrays for ports, FDBs, and filter blocks using\nkcalloc() with ethsw-\u003esw_attr.num_ifs as the element count. When the\ndevice reports zero interfaces (either due to hardware configuration\nor firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10)\ninstead of NULL.\n\nLater in dpaa2_switch_probe(), the NAPI initialization unconditionally\naccesses ethsw-\u003eports[0]-\u003enetdev, which attempts to dereference\nZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.\n\nAdd a check to ensure num_ifs is greater than zero after retrieving\ndevice attributes. This prevents the zero-sized allocations and\nsubsequent invalid pointer dereference."
}
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"providerMetadata": {
"dateUpdated": "2026-02-14T16:27:29.095Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f"
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{
"url": "https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60"
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{
"url": "https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af"
},
{
"url": "https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66"
}
],
"title": "dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero",
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"cveId": "CVE-2026-23206",
"datePublished": "2026-02-14T16:27:29.095Z",
"dateReserved": "2026-01-13T15:37:45.986Z",
"dateUpdated": "2026-02-14T16:27:29.095Z",
"state": "PUBLISHED"
},
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"vulnerability-lookup:meta": {
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}
}
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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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