CVE-2026-99026 (GCVE-0-2026-99026)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:21 – Updated: 2026-10-23 12:21
VLAI
Title
net: team: free skb when broadcast has no txable port
Summary
In the Linux kernel, the following vulnerability has been resolved: net: team: free skb when broadcast has no txable port bc_transmit() sends the original skb through the last txable port. When no port is txable, it returns false without consuming the skb, but team_xmit() still returns NETDEV_TX_OK. AF_PACKET sends then retain the skb and its socket write-memory charge. A TX-enabled, link-down port keeps the broadcast transmit op installed. Carrier can stay up through a second link-up, TX-disabled port or be forced on by userspace. Free the original skb on the no-port path while leaving the existing drop accounting intact. Discovered by Sashiko during review of previous commit.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7056 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5fc889911a99043a97da1daa0d010ad72cbc3042 , < 961563117626f4681623077ec0cfd86f86da0d49 (git)
Affected: 5fc889911a99043a97da1daa0d010ad72cbc3042 , < f34b1bcac4581a5bd3daf9eff90f175e736b54aa (git)
Affected: 5fc889911a99043a97da1daa0d010ad72cbc3042 , < 489114c9ecae44e523361a4b3e610ee5ebd9189c (git)
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Linux Linux Affected: 3.6
Unaffected: 0 , < 3.6 (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: team: free skb when broadcast has no txable port\n\nbc_transmit() sends the original skb through the last txable port.\nWhen no port is txable, it returns false without consuming the skb, but\nteam_xmit() still returns NETDEV_TX_OK. AF_PACKET sends then retain the\nskb and its socket write-memory charge.\n\nA TX-enabled, link-down port keeps the broadcast transmit op installed.\nCarrier can stay up through a second link-up, TX-disabled port or be\nforced on by userspace. Free the original skb on the no-port path while\nleaving the existing drop accounting intact.\n\nDiscovered by Sashiko during review of previous commit."
        }
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    "datePublished": "2026-10-23T12:21:13.509Z",
    "dateReserved": "2026-09-25T10:25:14.386Z",
    "dateUpdated": "2026-10-23T12:21:13.509Z",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: team: free skb when broadcast has no txable port\n\nbc_transmit() sends the original skb through the last txable port.\nWhen no port is txable, it returns false without consuming the skb, but\nteam_xmit() still returns NETDEV_TX_OK. AF_PACKET sends then retain the\nskb and its socket write-memory charge.\n\nA TX-enabled, link-down port keeps the broadcast transmit op installed.\nCarrier can stay up through a second link-up, TX-disabled port or be\nforced on by userspace. Free the original skb on the no-port path while\nleaving the existing drop accounting intact.\n\nDiscovered by Sashiko during review of previous commit."
          }
        ],
        "id": "CVE-2026-99026",
        "lastModified": "2026-10-23T13:17:25.610",
        "metrics": {},
        "published": "2026-10-23T13:17:25.610",
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        "vulnStatus": "Received"
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}



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