{"id":"CVE-2026-53088","state":"PUBLISHED","title":"net: bcmgenet: fix off-by-one in bcmgenet_put_txcb","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: fix off-by-one in bcmgenet_put_txcb\n\nThe write_ptr points to the next open tx_cb. We want to return the\ntx_cb that gets rewinded, so we must rewind the pointer first then\nreturn the tx_cb that it points to. That way the txcb can be correctly\ncleaned up.","publishedAt":"2026-06-24T16:30:27.655Z","updatedAt":"2026-10-19T19:47:16.337Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"14e9f86564fff7bcf7f45c1b69080e837b31d185","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"fb9a3c1f547d0ff024dbfe7b6f327626ddf0a3de","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"85f34ec320d3881badfd4edc5fee5cd5012bb54d","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"2a74590170427a3ca7cc4bb8690cdd559129c29c","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"29394f722f620281f2ee9a47f947734e53d72c90","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"4cab761fc51c65aef741fcece4a18f3554edbc09","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"72df896e31ddd06fcc5a789f025ad7a62a18bc9b","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"57f3f53d2c9c5a9e133596e2f7bc1c50688a6d38","versionType":"git"},{"version":"3bdf77194ea822390b405639b77659071fd2c2e9","status":"affected","versionType":"git"},{"version":"3.16.50","status":"affected","lessThan":"3.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/broadcom/genet/bcmgenet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.13","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/broadcom/genet/bcmgenet.c"]}],"references":["https://git.kernel.org/stable/c/14e9f86564fff7bcf7f45c1b69080e837b31d185","https://git.kernel.org/stable/c/fb9a3c1f547d0ff024dbfe7b6f327626ddf0a3de","https://git.kernel.org/stable/c/85f34ec320d3881badfd4edc5fee5cd5012bb54d","https://git.kernel.org/stable/c/2a74590170427a3ca7cc4bb8690cdd559129c29c","https://git.kernel.org/stable/c/29394f722f620281f2ee9a47f947734e53d72c90","https://git.kernel.org/stable/c/4cab761fc51c65aef741fcece4a18f3554edbc09","https://git.kernel.org/stable/c/72df896e31ddd06fcc5a789f025ad7a62a18bc9b","https://git.kernel.org/stable/c/57f3f53d2c9c5a9e133596e2f7bc1c50688a6d38"],"weaknesses":["CWE-193"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53088.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53088","state":"PUBLISHED","datePublished":"2026-06-24T16:30:27.655Z","dateUpdated":"2026-10-19T19:47:16.337Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.384Z"},"containers":{"cna":{"title":"net: bcmgenet: fix off-by-one in bcmgenet_put_txcb","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: fix off-by-one in bcmgenet_put_txcb\n\nThe write_ptr points to the next open tx_cb. We want to return the\ntx_cb that gets rewinded, so we must rewind the pointer first then\nreturn the tx_cb that it points to. That way the txcb can be correctly\ncleaned up."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"14e9f86564fff7bcf7f45c1b69080e837b31d185","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"fb9a3c1f547d0ff024dbfe7b6f327626ddf0a3de","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"85f34ec320d3881badfd4edc5fee5cd5012bb54d","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"2a74590170427a3ca7cc4bb8690cdd559129c29c","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"29394f722f620281f2ee9a47f947734e53d72c90","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"4cab761fc51c65aef741fcece4a18f3554edbc09","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"72df896e31ddd06fcc5a789f025ad7a62a18bc9b","versionType":"git"},{"version":"876dbadd53a7102e2a84afc84ea2bd3ee6dc5636","status":"affected","lessThan":"57f3f53d2c9c5a9e133596e2f7bc1c50688a6d38","versionType":"git"},{"version":"3bdf77194ea822390b405639b77659071fd2c2e9","status":"affected","versionType":"git"},{"version":"3.16.50","status":"affected","lessThan":"3.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/broadcom/genet/bcmgenet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.13","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/broadcom/genet/bcmgenet.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/14e9f86564fff7bcf7f45c1b69080e837b31d185"},{"url":"https://git.kernel.org/stable/c/fb9a3c1f547d0ff024dbfe7b6f327626ddf0a3de"},{"url":"https://git.kernel.org/stable/c/85f34ec320d3881badfd4edc5fee5cd5012bb54d"},{"url":"https://git.kernel.org/stable/c/2a74590170427a3ca7cc4bb8690cdd559129c29c"},{"url":"https://git.kernel.org/stable/c/29394f722f620281f2ee9a47f947734e53d72c90"},{"url":"https://git.kernel.org/stable/c/4cab761fc51c65aef741fcece4a18f3554edbc09"},{"url":"https://git.kernel.org/stable/c/72df896e31ddd06fcc5a789f025ad7a62a18bc9b"},{"url":"https://git.kernel.org/stable/c/57f3f53d2c9c5a9e133596e2f7bc1c50688a6d38"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - The vulnerable path is the bcmgenet Ethernet transmit path, reachable when a network-facing embedded/router system sends replies or forwards attacker-supplied traffic through the affected interface.\nAC:L - The off-by-one cleanup is deterministic once the transmit error/reclaim path is reached, and an attacker can repeatedly drive transmit activity and resource pressure without needing to win an uncontrolled race.\nPR:N - No authentication or local account is required in the highest-impact network-facing deployment, because unauthenticated network traffic can cause packets to be transmitted through the driver.\nUI:N - Exploitation does not require a victim user to open a file, mount media, or perform any other interactive action.\nS:U - The impact remains within the kernel and the affected host's networking/DMA resources, without crossing a separate security authority such as a VM boundary.\nC:H - The wrong transmit control block can leave stale skb/DMA metadata and later operate on dangling kernel objects, making kernel memory disclosure a defensible worst-case outcome.\nI:H - The stale control-block cleanup can plausibly become double-free or use-after-free style kernel heap corruption, which is treated as high integrity impact.\nA:H - Even without full exploitation, incorrect cleanup of transmit control blocks and DMA mappings can corrupt driver state, leak resources, or crash/hang networking/kernel execution."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:33:16.590Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16.50"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-53088","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:25:29.702977Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-193","lang":"en","type":"CWE","description":"CWE-193 Off-by-one Error"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:47:16.337Z"}}]}}}