CVE-2022-50252 (GCVE-0-2022-50252)
Vulnerability from cvelistv5 – Published: 2025-09-15 14:02 – Updated: 2026-08-05 08:57
VLAI
EPSS
VEX
Title
igb: Do not free q_vector unless new one was allocated
Summary
In the Linux kernel, the following vulnerability has been resolved:
igb: Do not free q_vector unless new one was allocated
Avoid potential use-after-free condition under memory pressure. If the
kzalloc() fails, q_vector will be freed but left in the original
adapter->q_vector[v_idx] array position.
Severity
7.8 (High)
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 64ca1969599857143e91aeec4440640656100803
(git)
Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 0200f0fbb11e359cc35af72ab10b2ec224e6f633 (git) Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 68e8adbcaf7a8743e473343b38b9dad66e2ac6f3 (git) Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < f96bd8adc8adde25390965a8c1ee81b73cb62075 (git) Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 3cb18dea11196fb4a06f78294cec5e61985e1aff (git) Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 314f7092b27749bdde44c14095b5533afa2a3bc8 (git) Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 6e399577bd397a517df4b938601108c63769ce0a (git) Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 56483aecf6b22eb7dff6315b3a174688c6ad494c (git) Affected: 72ddef0506da852dc82f078f37ced8ef4d74a2bf , < 0668716506ca66f90d395f36ccdaebc3e0e84801 (git) Affected: 5be042b1917ddf444c20f4e12856535307b37c01 (git) Affected: a0e26ed623a1e1460c1a191fbc0f37bddab7851a (git) Affected: f4b7f93cd34a6153d454a837708fd4203990d1ae (git) Affected: 3.18.23 , < 3.19 (semver) Affected: 4.1.9 , < 4.2 (semver) Affected: 4.2.2 , < 4.3 (semver) |
guessed | |
| Linux | Linux |
Affected:
4.3
Unaffected: 0 , < 4.3 (semver) Unaffected: 4.9.337 , ≤ 4.9.* (semver) Unaffected: 4.14.303 , ≤ 4.14.* (semver) Unaffected: 4.19.270 , ≤ 4.19.* (semver) Unaffected: 5.4.229 , ≤ 5.4.* (semver) Unaffected: 5.10.163 , ≤ 5.10.* (semver) Unaffected: 5.15.86 , ≤ 5.15.* (semver) Unaffected: 6.0.16 , ≤ 6.0.* (semver) Unaffected: 6.1.2 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix) |
guessed |
{
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{
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"programFiles": [
"drivers/net/ethernet/intel/igb/igb_main.c"
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{
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{
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},
{
"status": "affected",
"version": "f4b7f93cd34a6153d454a837708fd4203990d1ae",
"versionType": "git"
},
{
"lessThan": "3.19",
"status": "affected",
"version": "3.18.23",
"versionType": "semver"
},
{
"lessThan": "4.2",
"status": "affected",
"version": "4.1.9",
"versionType": "semver"
},
{
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"status": "affected",
"version": "4.2.2",
"versionType": "semver"
}
]
},
{
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],
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.3"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"version": "4.9.337",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.303",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.270",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.86",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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"versionStartIncluding": "4.3",
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},
{
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},
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},
{
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},
{
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},
{
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},
{
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},
{
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"versionStartIncluding": "4.1.9",
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},
{
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}
],
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}
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nigb: Do not free q_vector unless new one was allocated\n\nAvoid potential use-after-free condition under memory pressure. If the\nkzalloc() fails, q_vector will be freed but left in the original\nadapter-\u003eq_vector[v_idx] array position."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is reached only via local ethtool channel reconfiguration (ETHTOOL_SCHANNELS / ETHTOOL_MSG_CHANNELS_SET \u2192 igb_set_channels \u2192 igb_reinit_queues \u2192 igb_alloc_q_vector), not via received network packets or a remote protocol parser.\nAC:L - The attacker fully controls the ethtool -L call that grows q_vector size across the QUEUE_PAIRS threshold, and a local attacker can induce the required kzalloc() failure through memory exhaustion, so success does not depend on conditions outside their influence.\nPR:L - Triggering requires CAP_NET_ADMIN on the netns that owns the igb netdev (ns_capable / GENL_UNS_ADMIN_PERM), which is available to unprivileged userns/container tenants given an igb interface and is not full init-namespace root.\nUI:N - No separate victim action is required; the attacker issues the privileged ethtool/netlink request themselves.\nS:U - This is a host-kernel heap UAF in the igb PF driver with impact confined to the same kernel privilege domain; it is not a VM/IOMMU/sandbox boundary escape.\nC:H - The failed realloc leaves a dangling adapter-\u003eq_vector[] pointer to a freed object (including embedded rings/NAPI state), giving a classic UAF read primitive over reclaimable kernel heap memory.\nI:H - The same UAF/double-free of igb_q_vector (containing napi_struct and related pointers) is heap-sprayable into an arbitrary write / control-flow hijack, enabling code execution in kernel context.\nA:H - Use of the dangling q_vector on retry, teardown, or other driver paths causes kernel oops/panic or double-free, so availability impact is high even without a full exploit."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T08:57:56.935Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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"url": "https://git.kernel.org/stable/c/64ca1969599857143e91aeec4440640656100803"
},
{
"url": "https://git.kernel.org/stable/c/0200f0fbb11e359cc35af72ab10b2ec224e6f633"
},
{
"url": "https://git.kernel.org/stable/c/68e8adbcaf7a8743e473343b38b9dad66e2ac6f3"
},
{
"url": "https://git.kernel.org/stable/c/f96bd8adc8adde25390965a8c1ee81b73cb62075"
},
{
"url": "https://git.kernel.org/stable/c/3cb18dea11196fb4a06f78294cec5e61985e1aff"
},
{
"url": "https://git.kernel.org/stable/c/314f7092b27749bdde44c14095b5533afa2a3bc8"
},
{
"url": "https://git.kernel.org/stable/c/6e399577bd397a517df4b938601108c63769ce0a"
},
{
"url": "https://git.kernel.org/stable/c/56483aecf6b22eb7dff6315b3a174688c6ad494c"
},
{
"url": "https://git.kernel.org/stable/c/0668716506ca66f90d395f36ccdaebc3e0e84801"
}
],
"title": "igb: Do not free q_vector unless new one was allocated",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50252",
"datePublished": "2025-09-15T14:02:30.980Z",
"dateReserved": "2025-09-15T13:58:00.973Z",
"dateUpdated": "2026-08-05T08:57:56.935Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2022-50252",
"date": "2026-09-15",
"epss": "0.00163",
"percentile": "0.05832"
},
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If the\\nkzalloc() fails, q_vector will be freed but left in the original\\nadapter-\u003eq_vector[v_idx] array 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"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-08-04T22:59:25+00:00",
"cve": "CVE-2022-50252",
"id": "CVE-2022-50252",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:known_affected": "184",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: igb: Do not free q_vector unless new one was allocated",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50252.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-08-29T02:22:19Z",
"cve": "CVE-2022-50252",
"id": "CVE-2022-50252",
"initial_release_date": "2025-09-15T23:29:46Z",
"product_status:known_affected": "465",
"product_status:known_not_affected": "135",
"product_status:recommended": "385",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-50252",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50252.json",
"version": "47"
}
}
}
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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.
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.
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