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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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)
Create a notification for this product.
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)
Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-14T18:08:10+00:00",
      "cve": "CVE-2026-52985",
      "id": "CVE-2026-52985",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netdevsim: zero initialize struct iphdr in dummy sk_buff",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52985.json",
      "version": "3"
    }
  }
}



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