CVE-2026-52985 (GCVE-0-2026-52985)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28
VLAI
Title
netdevsim: zero initialize struct iphdr in dummy sk_buff
Summary
In the Linux kernel, the following vulnerability has been resolved: netdevsim: zero initialize struct iphdr in dummy sk_buff Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb_build, with the allocation also being performed in the same function. Fix this by calling skb_put_zero instead of skb_put to guarantee zero initialization of the whole IP header.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 175556c049eaec14efde8c6475e763b7579b9de7 (git)
Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 6e2cfd0904976e701d7a76b86b694e72af230ab0 (git)
Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 1b7b6ae0e93b8d512e208b1378d74af052e4f4e7 (git)
Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 818f7673ed7f4a29d4b9cee8184c47d6e57162b4 (git)
Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 978ca6ff789f1f19c03288ac20cc1f4774e88490 (git)
Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 750d0091bebf44975421268d37484ef87060d263 (git)
Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < bc6002865e8c4fcf9e94975f7cf023448d8764e2 (git)
Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 35eaa6d8d6c2ee65e96f507add856e0eacf24591 (git)
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Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: zero initialize struct iphdr in dummy sk_buff\n\nSyzbot reports a KMSAN uninit-value originating from\nnsim_dev_trap_skb_build, with the allocation also\nbeing performed in the same function.\n\nFix this by calling skb_put_zero instead of skb_put to\nguarantee zero initialization of the whole IP header."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:28:59.871Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-06-24T16:28:59.871Z",
    "dateReserved": "2026-06-09T07:44:35.376Z",
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    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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  }
}


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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.