CVE-2026-43303

{"id": "CVE-2026-43303", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2026-05-08T14:16:37.583", "references": [{"url": "https://git.kernel.org/stable/c/23b82b7a26182ad840ae67d390d7ec9771e8c00f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ac1ea219590c09572ed5992dc233bbf7bb70fef9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d757c793853ec5483eb41ec2942c300b8fa720fb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/page_alloc: clear page->private in free_pages_prepare()\n\nSeveral subsystems (slub, shmem, ttm, etc.) use page->private but don't\nclear it before freeing pages. When these pages are later allocated as\nhigh-order pages and split via split_page(), tail pages retain stale\npage->private values.\n\nThis causes a use-after-free in the swap subsystem. The swap code uses\npage->private to track swap count continuations, assuming freshly\nallocated pages have page->private == 0. When stale values are present,\nswap_count_continued() incorrectly assumes the continuation list is valid\nand iterates over uninitialized page->lru containing LIST_POISON values,\ncausing a crash:\n\n KASAN: maybe wild-memory-access in range [0xdead000000000100-0xdead000000000107]\n RIP: 0010:__do_sys_swapoff+0x1151/0x1860\n\nFix this by clearing page->private in free_pages_prepare(), ensuring all\nfreed pages have clean state regardless of previous use."}], "lastModified": "2026-05-15T13:27:39.440", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1BE1177-E500-439D-B3E5-0E63F54C1BE6", "versionEndExcluding": "6.18.16", "versionStartIncluding": "5.18.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0384FA0A-DE99-48D7-84E3-46ED0C3B5E03"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA5F085D-52F3-4EE2-8353-455D1A6FE073"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6EE5B78-0D83-4715-893C-ABD69B49E7FC"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EE723F14-047B-4FCF-B109-E0542EDFB063"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2FCFCE58-5118-4D05-864E-C82CF20EABE5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc9:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9C3E5BC9-613C-4362-BF02-153A5BBFFB2F"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}