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CVE-2022-50252 (GCVE-0-2022-50252)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:02 – Updated: 2026-08-05 08:57
VLAI
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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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)
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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 Create a notification for this product.
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              "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."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/64ca1969599857143e91aeec4440640656100803"
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          "url": "https://git.kernel.org/stable/c/0200f0fbb11e359cc35af72ab10b2ec224e6f633"
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        {
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      "title": "igb: Do not free q_vector unless new one was allocated",
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    "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"
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      "cve": "CVE-2022-50252",
      "date": "2026-09-17",
      "epss": "0.00163",
      "percentile": "0.05896"
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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"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.