{"id":"CVE-2026-99026","state":"PUBLISHED","title":"net: team: free skb when broadcast has no txable port","description":"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.","publishedAt":"2026-10-23T12:21:13.509Z","updatedAt":"2026-10-23T12:21:13.509Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5fc889911a99043a97da1daa0d010ad72cbc3042","status":"affected","lessThan":"961563117626f4681623077ec0cfd86f86da0d49","versionType":"git"},{"version":"5fc889911a99043a97da1daa0d010ad72cbc3042","status":"affected","lessThan":"f34b1bcac4581a5bd3daf9eff90f175e736b54aa","versionType":"git"},{"version":"5fc889911a99043a97da1daa0d010ad72cbc3042","status":"affected","lessThan":"489114c9ecae44e523361a4b3e610ee5ebd9189c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/team/team_mode_broadcast.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.6","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/team/team_mode_broadcast.c"]}],"references":["https://git.kernel.org/stable/c/961563117626f4681623077ec0cfd86f86da0d49","https://git.kernel.org/stable/c/f34b1bcac4581a5bd3daf9eff90f175e736b54aa","https://git.kernel.org/stable/c/489114c9ecae44e523361a4b3e610ee5ebd9189c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99026.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99026","state":"PUBLISHED","datePublished":"2026-10-23T12:21:13.509Z","dateUpdated":"2026-10-23T12:21:13.509Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.386Z"},"containers":{"cna":{"title":"net: team: free skb when broadcast has no txable port","descriptions":[{"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5fc889911a99043a97da1daa0d010ad72cbc3042","status":"affected","lessThan":"961563117626f4681623077ec0cfd86f86da0d49","versionType":"git"},{"version":"5fc889911a99043a97da1daa0d010ad72cbc3042","status":"affected","lessThan":"f34b1bcac4581a5bd3daf9eff90f175e736b54aa","versionType":"git"},{"version":"5fc889911a99043a97da1daa0d010ad72cbc3042","status":"affected","lessThan":"489114c9ecae44e523361a4b3e610ee5ebd9189c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/team/team_mode_broadcast.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.6","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/team/team_mode_broadcast.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/961563117626f4681623077ec0cfd86f86da0d49"},{"url":"https://git.kernel.org/stable/c/f34b1bcac4581a5bd3daf9eff90f175e736b54aa"},{"url":"https://git.kernel.org/stable/c/489114c9ecae44e523361a4b3e610ee5ebd9189c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-23T12:21:13.509Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.6","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.6","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.6","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}