{"id":"DEBIAN-CVE-2023-52739","details":"In the Linux kernel, the following vulnerability has been resolved:  Fix page corruption caused by racy check in __free_pages  When we upgraded our kernel, we started seeing some page corruption like the following consistently:    BUG: Bad page state in process ganesha.nfsd  pfn:1304ca   page:0000000022261c55 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 pfn:0x1304ca   flags: 0x17ffffc0000000()   raw: 0017ffffc0000000 ffff8a513ffd4c98 ffffeee24b35ec08 0000000000000000   raw: 0000000000000000 0000000000000001 00000000ffffff7f 0000000000000000   page dumped because: nonzero mapcount   CPU: 0 PID: 15567 Comm: ganesha.nfsd Kdump: loaded Tainted: P    B      O      5.10.158-1.nutanix.20221209.el7.x86_64 #1   Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 04/05/2016   Call Trace:    dump_stack+0x74/0x96    bad_page.cold+0x63/0x94    check_new_page_bad+0x6d/0x80    rmqueue+0x46e/0x970    get_page_from_freelist+0xcb/0x3f0    ? _cond_resched+0x19/0x40    __alloc_pages_nodemask+0x164/0x300    alloc_pages_current+0x87/0xf0    skb_page_frag_refill+0x84/0x110    ...  Sometimes, it would also show up as corruption in the free list pointer and cause crashes.  After bisecting the issue, we found the issue started from commit e320d3012d25 (\"mm/page_alloc.c: fix freeing non-compound pages\"):  \tif (put_page_testzero(page)) \t\tfree_the_page(page, order); \telse if (!PageHead(page)) \t\twhile (order-- \u003e 0) \t\t\tfree_the_page(page + (1 \u003c\u003c order), order);  So the problem is the check PageHead is racy because at this point we already dropped our reference to the page.  So even if we came in with compound page, the page can already be freed and PageHead can return false and we will end up freeing all the tail pages causing double free.","modified":"2026-09-15T09:02:48.603672151Z","published":"2024-05-21T16:15:13.820Z","upstream":["CVE-2023-52739"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-52739"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52739.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52739.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52739.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}