CVE-2026-74495 (GCVE-0-2026-74495)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-17 05:47
VLAI
Title
igbvf: Fix leak in TX DMA error cleanup
Summary
In the Linux kernel, the following vulnerability has been resolved: igbvf: Fix leak in TX DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak. This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c1fa347f20f17f14a4a1575727fa24340e8a9117 , < 31089f4eab42e0fc248ec80c26f9b0bad59ba4cc (git)
Affected: c1fa347f20f17f14a4a1575727fa24340e8a9117 , < bc25d56c03e41c10bc4b40e99ca5d7b941675c04 (git)
Affected: c1fa347f20f17f14a4a1575727fa24340e8a9117 , < 845a9cdd9b03b7b6fa8de3ee80579780350a7f65 (git)
Affected: c1fa347f20f17f14a4a1575727fa24340e8a9117 , < df07003b5a6c6c9fce60d765d6a3da815a74c41c (git)
Affected: c1fa347f20f17f14a4a1575727fa24340e8a9117 , < 0565052b7e2f436b7f1541f4849da96dc0aa7a0e (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.33
Unaffected: 0 , < 2.6.33 (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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            "drivers/net/ethernet/intel/igbvf/netdev.c"
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    "suse_vex": {
      "aggregate_severity": "critical",
      "current_release_date": "2026-08-17T16:26:19Z",
      "cve": "CVE-2026-74495",
      "id": "CVE-2026-74495",
      "initial_release_date": "2026-08-15T23:51:37Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74495",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74495.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.