CVE-2025-38375 (GCVE-0-2025-38375)

Vulnerability from cvelistv5 – Published: 2025-07-25 12:53 – Updated: 2026-08-05 12:01
VLAI
Title
virtio-net: ensure the received length does not exceed allocated size
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio-net: ensure the received length does not exceed allocated size In xdp_linearize_page, when reading the following buffers from the ring, we forget to check the received length with the true allocate size. This can lead to an out-of-bound read. This commit adds that missing check.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < 773e95c268b5d859f51f7547559734fd2a57660c (git)
Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < ddc8649d363141fb3371dd81a73e1cb4ef8ed1e1 (git)
Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < 982beb7582c193544eb9c6083937ec5ac1c9d651 (git)
Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < 6aca3dad2145e864dfe4d1060f45eb1bac75dd58 (git)
Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < 80b971be4c37a4d23a7f1abc5ff33dc7733d649b (git)
Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < bc68bc3563344ccdc57d1961457cdeecab8f81ef (git)
Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < 11f2d0e8be2b5e784ac45fa3da226492c3e506d8 (git)
Affected: 4941d472bf95b4345d6e38906fcf354e74afa311 , < 315dbdd7cdf6aa533829774caaf4d25f1fd20e73 (git)
Create a notification for this product.
Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.189 , ≤ 5.15.* (semver)
Unaffected: 6.1.144 , ≤ 6.1.* (semver)
Unaffected: 6.6.97 , ≤ 6.6.* (semver)
Unaffected: 6.12.37 , ≤ 6.12.* (semver)
Unaffected: 6.15.6 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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              "value": "AV:L - The attacker-controlled value is the used-ring length written by the virtio backend (hypervisor/VMM, vhost-user daemon, VDUSE device, or vDPA hardware), not anything carried in received network packets, so a remote peer cannot reach it. The attack is delivered over the local paravirtual transport, matching kernel CNA precedent for virtio device-supplied-length bugs (CVE-2026-64456, CVE-2026-46123).\nAC:L - The backend fully and deterministically controls both `hdr-\u003enum_buffers` and the used-ring `len`, with no race to win and no memory-layout guessing required; a single crafted RX completion triggers it every time. XDP attachment is a target configuration the backend can observe via the guest\u0027s headroom/GSO renegotiation, not an uncontrollable condition.\nPR:N - The malicious backend needs no credentials, account, or capability inside the victim guest \u2014 it simply completes a receive buffer with a bogus length. This matches the PR:N scoring used for the equivalent virtio_bt and hwrng-virtio device-length CVEs.\nUI:N - Triggering requires only that the driver process an RX completion in NAPI/softirq context, which happens automatically. No victim action of any kind is needed.\nS:U - The vulnerable component and the impacted component are both the virtio_net driver\u0027s own kernel, and a host-to-guest attack does not gain the attacker authority it did not already hold. This is not a guest-to-host escape or an IOMMU/DMA boundary bypass.\nC:H - Each malformed completion copies up to ~3.5 KB of adjacent kernel memory into the linearized packet, which the XDP program can then XDP_TX/XDP_REDIRECT back to the attacker or which reaches userspace via a socket, giving a repeatable kernel memory disclosure channel. The integer-overflow variant extends the read arbitrarily far past the source buffer.\nI:H - The `page_off + buflen + tailroom \u003e PAGE_SIZE` guard is defeated by unsigned wraparound (verified: `buflen = 0xFFFFFD5C` makes the sum evaluate to 0), so the memcpy writes gigabytes beyond the single-page destination, corrupting arbitrary kernel heap memory. That is an out-of-bounds write, not merely the out-of-bounds read named in the commit message.\nA:H - Reading past the end of the source page, or the multi-gigabyte memcpy from the overflow variant, faults in softirq context and oopses/panics the kernel, and is instantly reproducible under KASAN or DEBUG_PAGEALLOC. The wholesale kernel memory corruption makes a crash the expected outcome."
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Esto puede provocar una lectura fuera de los l\u00edmites. Este commit a\u00f1ade esta verificaci\u00f3n faltante.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/virtio_net.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"773e95c268b5d859f51f7547559734fd2a57660c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"ddc8649d363141fb3371dd81a73e1cb4ef8ed1e1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"982beb7582c193544eb9c6083937ec5ac1c9d651\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"6aca3dad2145e864dfe4d1060f45eb1bac75dd58\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"80b971be4c37a4d23a7f1abc5ff33dc7733d649b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"bc68bc3563344ccdc57d1961457cdeecab8f81ef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"11f2d0e8be2b5e784ac45fa3da226492c3e506d8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4941d472bf95b4345d6e38906fcf354e74afa311\",\"lessThan\":\"315dbdd7cdf6aa533829774caaf4d25f1fd20e73\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/virtio_net.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.297\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.241\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.189\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.144\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.97\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.37\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.6\",\"lessThanOrEqual\":\"6.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14\",\"versionEndExcluding\":\"5.4.297\",\"matchCriteriaId\":\"B29C5E30-71B7-40E0-9EA4-4A316145D06D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.241\",\"matchCriteriaId\":\"D0D21C35-EB8A-488A-BBF9-403E4817E5DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.189\",\"matchCriteriaId\":\"3CE0FB9A-DBE8-48B6-BF6E-3C724A4991E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.144\",\"matchCriteriaId\":\"81CF08DB-B7A2-4556-8AE3-ED9144F50E31\"},{\"vulnerable\":tr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Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T09:14:02+00:00",
      "cve": "CVE-2025-38375",
      "id": "CVE-2025-38375",
      "initial_release_date": "2025-07-25T00:00:00+00:00",
      "product_status:known_affected": "170",
      "product_status:known_not_affected": "104",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: virtio-net: ensure the received length does not exceed allocated size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38375.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-17T13:10:31Z",
      "cve": "CVE-2025-38375",
      "id": "CVE-2025-38375",
      "initial_release_date": "2025-07-29T23:24:09Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "481",
      "product_status:known_not_affected": "52",
      "product_status:recommended": "782",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38375",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38375.json",
      "version": "56"
    }
  }
}



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Taxonomy of the tags.





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.