186 lines
9.6 KiB
JSON
186 lines
9.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-90201",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.792Z",
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"datePublished": "2026-09-17T16:07:18.838Z",
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"dateUpdated": "2026-10-19T08:59:37.392Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T08:59:37.392Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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()."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/core/page_pool.c"
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],
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"versions": [
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{
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"version": "4f51fb0d257ff4d406ec27966902de075e3b118e",
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"lessThan": "bbfef303f980c1c078b8fa142e10a0e2fbcdd247",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95",
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"lessThan": "424a9fc4876cc7f28e9cb0aa8d92e920d726e350",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95",
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"lessThan": "9b65b0253ad5a66f73efee9a79a21a1e2b57cf59",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ee62ce7a1d909ccba0399680a03c2dee83bcae95",
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"lessThan": "24ef02f934eeb48830cff6b739abc3c62b1d107b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c30ae60f41f9edd6e1b5cad41cf28ce04dae39e4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.12.34",
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"lessThan": "6.12.110",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.15.3",
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"lessThan": "6.16",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/core/page_pool.c"
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],
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"versions": [
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{
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"version": "6.16",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.16",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.34",
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"versionEndExcluding": "6.12.110"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.18.52"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.2.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/bbfef303f980c1c078b8fa142e10a0e2fbcdd247"
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},
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{
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"url": "https://git.kernel.org/stable/c/424a9fc4876cc7f28e9cb0aa8d92e920d726e350"
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},
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{
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"url": "https://git.kernel.org/stable/c/9b65b0253ad5a66f73efee9a79a21a1e2b57cf59"
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},
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{
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"url": "https://git.kernel.org/stable/c/24ef02f934eeb48830cff6b739abc3c62b1d107b"
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}
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],
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"title": "net: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |