# CVE-2023-52739: linux: In the Linux kernel, the following vulnerability has been resolved: Fix page corruption caused by racy check in __fr... CVE-2023-52739 is fixed in 20 products on 1 platform, first by ALAS2023-2023-132, released March 11, 2023. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2023-52739 - Priority: Routine - CVSS: 5.5 (medium) - EPSS: 0.0026 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Mar 11, 2023 ## Description 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"): if (put_page_testzero(page)) free_the_page(page, order); else if (!PageHead(page)) while (order-- > 0) free_the_page(page + (1 << 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-devel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-headers amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-libbpf amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-livepatch-6.1.12-17.42 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-tools amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | kernel-tools-devel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | linux Debian 12.15 (bookworm) | 6.1.12-1 | [DEBIAN-CVE-2023-52739](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52739.md) | May 21, 2024 | | Linux | linux Debian 13.5 (trixie) | 6.1.12-1 | [DEBIAN-CVE-2023-52739](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52739.md) | May 21, 2024 | | Linux | linux Debian 14 | 6.1.12-1 | [DEBIAN-CVE-2023-52739](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52739.md) | May 21, 2024 | | Linux | perf amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | perf-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | python3-perf amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 | --- Data as of 2026-11-09T19:38:12Z UTC. 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