{"id":"CVE-2026-80988","state":"PUBLISHED","title":"NTB: ntb_transport: Fail TX enqueue when the QP link is down","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: ntb_transport: Fail TX enqueue when the QP link is down\n\nCommit f195a1a6fe41 (\"ntb: Drop packets when qp link is down\") meant to\nmake ntb_transport_tx_enqueue() drop packets submitted while the QP link\nis down, but it only returns 0 without consuming the packet. Zero means\nsuccess by this function's contract, so ntb_netdev reports NETDEV_TX_OK\nand forgets the skb: nothing queued it, nothing frees it, and it leaks,\none skb for every transmit racing a link-down.\n\nReturn -ENOLINK instead, restoring the contract that a non-zero return\nleaves the buffer owned by the caller. With the preceding patch,\nntb_netdev frees the skb on non-retryable enqueue failures and returns\nNETDEV_TX_OK, so a packet racing with link-down is dropped without leaking\nor entering a busy retry loop.","publishedAt":"2026-09-11T19:42:46.228Z","updatedAt":"2026-10-19T08:46:12.548Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3cfdc448e8bfa8a7eaa5af87f357330566124b78","status":"affected","lessThan":"76c9ccc0c6bebfc74c0e727eda67687f5103ab06","versionType":"git"},{"version":"bfa051f650a7708183bd86901ca4645dcf88c486","status":"affected","lessThan":"96d792c65b9d5f7f9dd86a1004315db59e450c07","versionType":"git"},{"version":"4f4af6b8b7a23fa37decaf43b55403e6bfd8e219","status":"affected","lessThan":"45cc11035165918dd1f81796ea98f81ece20d361","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"e6cc541fab01099fd8efadfa4f13afdf118bf536","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"5eca0d899a3be661a7e2caaaa7467a6fa15d756c","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"894e136b432da75c0352c80299807a5c4b04f167","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"89177732fe1653bbfef10cf5d99bf20cf57762c2","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"873ce713fef5dde0939220f04f3484ec86a16fba","versionType":"git"},{"version":"aa6d6ed213b62cbdb09ea32abbfa085dd987a0c9","status":"affected","versionType":"git"},{"version":"a8986a61ebee0b54c5d648444fbae09bd1c6dcd2","status":"affected","versionType":"git"},{"version":"94491412a2afc8a5aea4c5b455aed86d3486f0b1","status":"affected","versionType":"git"},{"version":"c2cd5d993f57f819d46fe62387d3cc34d8468e60","status":"affected","versionType":"git"},{"version":"449b1978d4e50b14b2a4de3a26d0b074593926a3","status":"affected","versionType":"git"},{"version":"5.10.195","status":"affected","lessThan":"5.10.270","versionType":"semver"},{"version":"5.15.132","status":"affected","lessThan":"5.15.221","versionType":"semver"},{"version":"6.1.53","status":"affected","lessThan":"6.1.188","versionType":"semver"},{"version":"4.14.326","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.295","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.257","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.4.16","status":"affected","lessThan":"6.5","versionType":"semver"},{"version":"6.5.3","status":"affected","lessThan":"6.6","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ntb/ntb_transport.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","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/ntb/ntb_transport.c"]}],"references":["https://git.kernel.org/stable/c/76c9ccc0c6bebfc74c0e727eda67687f5103ab06","https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07","https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361","https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536","https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c","https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167","https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2","https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80988.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80988","state":"PUBLISHED","datePublished":"2026-09-11T19:42:46.228Z","dateUpdated":"2026-10-19T08:46:12.548Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.811Z"},"containers":{"cna":{"title":"NTB: ntb_transport: Fail TX enqueue when the QP link is down","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: ntb_transport: Fail TX enqueue when the QP link is down\n\nCommit f195a1a6fe41 (\"ntb: Drop packets when qp link is down\") meant to\nmake ntb_transport_tx_enqueue() drop packets submitted while the QP link\nis down, but it only returns 0 without consuming the packet. Zero means\nsuccess by this function's contract, so ntb_netdev reports NETDEV_TX_OK\nand forgets the skb: nothing queued it, nothing frees it, and it leaks,\none skb for every transmit racing a link-down.\n\nReturn -ENOLINK instead, restoring the contract that a non-zero return\nleaves the buffer owned by the caller. With the preceding patch,\nntb_netdev frees the skb on non-retryable enqueue failures and returns\nNETDEV_TX_OK, so a packet racing with link-down is dropped without leaking\nor entering a busy retry loop."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3cfdc448e8bfa8a7eaa5af87f357330566124b78","status":"affected","lessThan":"76c9ccc0c6bebfc74c0e727eda67687f5103ab06","versionType":"git"},{"version":"bfa051f650a7708183bd86901ca4645dcf88c486","status":"affected","lessThan":"96d792c65b9d5f7f9dd86a1004315db59e450c07","versionType":"git"},{"version":"4f4af6b8b7a23fa37decaf43b55403e6bfd8e219","status":"affected","lessThan":"45cc11035165918dd1f81796ea98f81ece20d361","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"e6cc541fab01099fd8efadfa4f13afdf118bf536","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"5eca0d899a3be661a7e2caaaa7467a6fa15d756c","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"894e136b432da75c0352c80299807a5c4b04f167","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"89177732fe1653bbfef10cf5d99bf20cf57762c2","versionType":"git"},{"version":"f195a1a6fe416882984f8bd6c61afc1383171860","status":"affected","lessThan":"873ce713fef5dde0939220f04f3484ec86a16fba","versionType":"git"},{"version":"aa6d6ed213b62cbdb09ea32abbfa085dd987a0c9","status":"affected","versionType":"git"},{"version":"a8986a61ebee0b54c5d648444fbae09bd1c6dcd2","status":"affected","versionType":"git"},{"version":"94491412a2afc8a5aea4c5b455aed86d3486f0b1","status":"affected","versionType":"git"},{"version":"c2cd5d993f57f819d46fe62387d3cc34d8468e60","status":"affected","versionType":"git"},{"version":"449b1978d4e50b14b2a4de3a26d0b074593926a3","status":"affected","versionType":"git"},{"version":"5.10.195","status":"affected","lessThan":"5.10.270","versionType":"semver"},{"version":"5.15.132","status":"affected","lessThan":"5.15.221","versionType":"semver"},{"version":"6.1.53","status":"affected","lessThan":"6.1.188","versionType":"semver"},{"version":"4.14.326","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.295","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.257","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"6.4.16","status":"affected","lessThan":"6.5","versionType":"semver"},{"version":"6.5.3","status":"affected","lessThan":"6.6","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ntb/ntb_transport.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","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/ntb/ntb_transport.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/76c9ccc0c6bebfc74c0e727eda67687f5103ab06"},{"url":"https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07"},{"url":"https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361"},{"url":"https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536"},{"url":"https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c"},{"url":"https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167"},{"url":"https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2"},{"url":"https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:46:12.548Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.195","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.132","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.53","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:lin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