CVE-2026-90201

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90201", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.792Z", "datePublished": "2026-09-17T16:07:18.838Z", "dateUpdated": "2026-10-19T08:59:37.392Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:59:37.392Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race\n\nThis bug was discovered while testing the hns3 driver under channel\nreconfiguration (`ethtool -L` / `ethtool -G`) with iperf3 traffic on\narm64. The race is intermittently triggered when page_pool_destroy()\nruns page_pool_scrub() concurrently with page return via\npage_pool_put_netmem() on a different CPU. A WARN in\npage_pool_clear_pp_info() surfaced the dangling DMA index bits left\nby the cmpxchg loser, which led to the investigation.\n\npage_pool_scrub() iterates pool->dma_mapped via xa_for_each() with no\npage ref held. __page_pool_release_netmem_dma() currently reads and\nwrites netmem fields (dma_addr, DMA index bits in pp_magic) after\nxa_cmpxchg() returns. The unref path calls put_page() unconditionally\nregardless of the cmpxchg outcome; when it loses the cmpxchg, it still\nfrees the page before the scrub winner finishes these netmem accesses,\nso scrub touches a freed page -- a Use-After-Free.\n\nFix this by splitting the DMA release into two functions:\n\n1. __page_pool_unmap_netmem_dma() caches dma_addr before xa_cmpxchg(),\n does the cmpxchg to remove the DMA mapping, and calls dma_unmap on\n the cached address. It never touches netmem fields after the cmpxchg,\n making it safe for the scrub path which holds no page ref.\n\n2. __page_pool_release_netmem_dma() wraps the above and additionally\n clears dma_addr and DMA index bits in netmem fields. This is safe\n only when the caller holds a page ref, so it is used by the return\n path (page_pool_return_netmem).\n\nThe scrub path calls __page_pool_unmap_netmem_dma() directly; the return\npath calls __page_pool_release_netmem_dma()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/page_pool.c"], "versions": [{"version": "4f51fb0d257ff4d406ec27966902de075e3b118e", "lessThan": "bbfef303f980c1c078b8fa142e10a0e2fbcdd247", "status": "affected", "versionType": "git"}, {"version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95", "lessThan": "424a9fc4876cc7f28e9cb0aa8d92e920d726e350", "status": "affected", "versionType": "git"}, {"version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95", "lessThan": "9b65b0253ad5a66f73efee9a79a21a1e2b57cf59", "status": "affected", "versionType": "git"}, {"version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95", "lessThan": "24ef02f934eeb48830cff6b739abc3c62b1d107b", "status": "affected", "versionType": "git"}, {"version": "c30ae60f41f9edd6e1b5cad41cf28ce04dae39e4", "status": "affected", "versionType": "git"}, {"version": "6.12.34", "lessThan": "6.12.110", "status": "affected", "versionType": "semver"}, {"version": "6.15.3", "lessThan": "6.16", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/page_pool.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.34", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bbfef303f980c1c078b8fa142e10a0e2fbcdd247"}, {"url": "https://git.kernel.org/stable/c/424a9fc4876cc7f28e9cb0aa8d92e920d726e350"}, {"url": "https://git.kernel.org/stable/c/9b65b0253ad5a66f73efee9a79a21a1e2b57cf59"}, {"url": "https://git.kernel.org/stable/c/24ef02f934eeb48830cff6b739abc3c62b1d107b"}], "title": "net: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/core/page_pool.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "bbfef303f980c1c078b8fa142e10a0e2fbcdd247", "status": "affected", "version": "4f51fb0d257ff4d406ec27966902de075e3b118e", "versionType": "git"}, {"lessThan": "424a9fc4876cc7f28e9cb0aa8d92e920d726e350", "status": "affected", "version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95", "versionType": "git"}, {"lessThan": "9b65b0253ad5a66f73efee9a79a21a1e2b57cf59", "status": "affected", "version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95", "versionType": "git"}, {"lessThan": "24ef02f934eeb48830cff6b739abc3c62b1d107b", "status": "affected", "version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95", "versionType": "git"}, {"status": "affected", "version": "c30ae60f41f9edd6e1b5cad41cf28ce04dae39e4", "versionType": "git"}, {"lessThan": "6.12.110", "status": "affected", "version": "6.12.34", "versionType": "semver"}, {"lessThan": "6.16", "status": "affected", "version": "6.15.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/core/page_pool.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race\n\nThis bug was discovered while testing the hns3 driver under channel\nreconfiguration (`ethtool -L` / `ethtool -G`) with iperf3 traffic on\narm64. The race is intermittently triggered when page_pool_destroy()\nruns page_pool_scrub() concurrently with page return via\npage_pool_put_netmem() on a different CPU. A WARN in\npage_pool_clear_pp_info() surfaced the dangling DMA index bits left\nby the cmpxchg loser, which led to the investigation.\n\npage_pool_scrub() iterates pool->dma_mapped via xa_for_each() with no\npage ref held. __page_pool_release_netmem_dma() currently reads and\nwrites netmem fields (dma_addr, DMA index bits in pp_magic) after\nxa_cmpxchg() returns. The unref path calls put_page() unconditionally\nregardless of the cmpxchg outcome; when it loses the cmpxchg, it still\nfrees the page before the scrub winner finishes these netmem accesses,\nso scrub touches a freed page -- a Use-After-Free.\n\nFix this by splitting the DMA release into two functions:\n\n1. __page_pool_unmap_netmem_dma() caches dma_addr before xa_cmpxchg(),\n does the cmpxchg to remove the DMA mapping, and calls dma_unmap on\n the cached address. It never touches netmem fields after the cmpxchg,\n making it safe for the scrub path which holds no page ref.\n\n2. __page_pool_release_netmem_dma() wraps the above and additionally\n clears dma_addr and DMA index bits in netmem fields. This is safe\n only when the caller holds a page ref, so it is used by the return\n path (page_pool_return_netmem).\n\nThe scrub path calls __page_pool_unmap_netmem_dma() directly; the return\npath calls __page_pool_release_netmem_dma()."}], "id": "CVE-2026-90201", "lastModified": "2026-10-19T09:19:10.163", "metrics": {}, "published": "2026-09-17T17:17:15.053", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24ef02f934eeb48830cff6b739abc3c62b1d107b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/424a9fc4876cc7f28e9cb0aa8d92e920d726e350"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9b65b0253ad5a66f73efee9a79a21a1e2b57cf59"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbfef303f980c1c078b8fa142e10a0e2fbcdd247"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f51fb0d257ff4d406ec27966902de075e3b118e,bbfef303f980c1c078b8fa142e10a0e2fbcdd247)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ee62ce7a1d909ccba0399680a03c2dee83bcae95,424a9fc4876cc7f28e9cb0aa8d92e920d726e350)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ee62ce7a1d909ccba0399680a03c2dee83bcae95,9b65b0253ad5a66f73efee9a79a21a1e2b57cf59)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ee62ce7a1d909ccba0399680a03c2dee83bcae95,24ef02f934eeb48830cff6b739abc3c62b1d107b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c30ae60f41f9edd6e1b5cad41cf28ce04dae39e4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.34,6.12.110)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.15.3,6.16)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T20:02:06.384258+00:00", "updated": "2026-09-20T03:45:12.286664+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}