VOOZH about

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-43303

⇱ NVD - CVE-2026-43303

  1. Vulnerabilities

CVE-2026-43303 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

In the Linux kernel, the following vulnerability has been resolved: mm/page_alloc: clear page->private in free_pages_prepare() Several subsystems (slub, shmem, ttm, etc.) use page->private but don't clear it before freeing pages. When these pages are later allocated as high-order pages and split via split_page(), tail pages retain stale page->private values. This causes a use-after-free in the swap subsystem. The swap code uses page->private to track swap count continuations, assuming freshly allocated pages have page->private == 0. When stale values are present, swap_count_continued() incorrectly assumes the continuation list is valid and iterates over uninitialized page->lru containing LIST_POISON values, causing a crash: KASAN: maybe wild-memory-access in range [0xdead000000000100-0xdead000000000107] RIP: 0010:__do_sys_swapoff+0x1151/0x1860 Fix this by clearing page->private in free_pages_prepare(), ensuring all freed pages have clean state regardless of previous use.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL Source(s) Tag(s)
https://git.kernel.org/stable/c/23b82b7a26182ad840ae67d390d7ec9771e8c00f kernel.org Patch 
https://git.kernel.org/stable/c/3edb8ebbf79b9016040e8f3421d723ae3d542b32 kernel.org
https://git.kernel.org/stable/c/ac1ea219590c09572ed5992dc233bbf7bb70fef9 kernel.org Patch 
https://git.kernel.org/stable/c/d757c793853ec5483eb41ec2942c300b8fa720fb kernel.org Patch 
https://git.kernel.org/stable/c/e7790ab165713b79b1617ce659742ceb3a859d05 kernel.org
https://git.kernel.org/stable/c/f9719e32a67b4b00b3c9b133e8b5ffa72a26b67b kernel.org

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free 👁 cwe source acceptance level
NIST  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

6 change records found show changes

CVE Modified by kernel.org 6/19/2026 9:16:29 AM

Action Type Old Value New Value
Added Reference 
https://git.kernel.org/stable/c/3edb8ebbf79b9016040e8f3421d723ae3d542b32
Added Reference 
https://git.kernel.org/stable/c/e7790ab165713b79b1617ce659742ceb3a859d05
Changed Affected 
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["mm/page_alloc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"f9719e32a67b4b00b3c9b133e8b5ffa72a26b67b","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"23b82b7a26182ad840ae67d390d7ec9771e8c00f","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"d757c793853ec5483eb41ec2942c300b8fa720fb","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"ac1ea219590c09572ed5992dc233bbf7bb70fef9","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["mm/page_alloc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.18","status":"affected"},{"version":"0","lessThan":"5.18","versionType":"semver","status":"unaffected"},{"version":"6.12.93","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.16","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"6.19.6","lessThanOrEqual":"6.19.*","versionType":"semver","status":"unaffected"},{"version":"7.0","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]


 
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["mm/page_alloc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"e7790ab165713b79b1617ce659742ceb3a859d05","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"3edb8ebbf79b9016040e8f3421d723ae3d542b32","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"f9719e32a67b4b00b3c9b133e8b5ffa72a26b67b","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"23b82b7a26182ad840ae67d390d7ec9771e8c00f","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"d757c793853ec5483eb41ec2942c300b8fa720fb","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"ac1ea219590c09572ed5992dc233bbf7bb70fef9","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["mm/page_alloc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.18","status":"affected"},{"version":"0","lessThan":"5.18","versionType":"semver","status":"unaffected"},{"version":"6.1.176","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.143","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.93","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.16","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"6.19.6","lessThanOrEqual":"6.19.*","versionType":"semver","status":"unaffected"},{"version":"7.0","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

CVE Modified by kernel.org 6/17/2026 6:49:20 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["mm/page_alloc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"f9719e32a67b4b00b3c9b133e8b5ffa72a26b67b","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"23b82b7a26182ad840ae67d390d7ec9771e8c00f","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"d757c793853ec5483eb41ec2942c300b8fa720fb","versionType":"git","status":"affected"},{"version":"3b8000ae185cb068adbda5f966a3835053c85fd4","lessThan":"ac1ea219590c09572ed5992dc233bbf7bb70fef9","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["mm/page_alloc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.18","status":"affected"},{"version":"0","lessThan":"5.18","versionType":"semver","status":"unaffected"},{"version":"6.12.93","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.16","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"6.19.6","lessThanOrEqual":"6.19.*","versionType":"semver","status":"unaffected"},{"version":"7.0","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

CVE Modified by kernel.org 6/09/2026 7:16:51 AM

Action Type Old Value New Value
Added Reference 
https://git.kernel.org/stable/c/f9719e32a67b4b00b3c9b133e8b5ffa72a26b67b

Initial Analysis by NIST 5/15/2026 9:27:39 AM

Action Type Old Value New Value
Added CWE 
CWE-416
Added CPE Configuration 
OR
 *cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:5.18:rc4:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:5.18:rc5:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:5.18:rc6:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:5.18:rc9:*:*:*:*:*:*
 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.6
 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.18.1 up to (excluding) 6.18.16
Added Reference Type 
kernel.org: https://git.kernel.org/stable/c/23b82b7a26182ad840ae67d390d7ec9771e8c00f Types: Patch
Added Reference Type 
kernel.org: https://git.kernel.org/stable/c/ac1ea219590c09572ed5992dc233bbf7bb70fef9 Types: Patch
Added Reference Type 
kernel.org: https://git.kernel.org/stable/c/d757c793853ec5483eb41ec2942c300b8fa720fb Types: Patch

CVE Modified by kernel.org 5/11/2026 4:16:08 AM

Action Type Old Value New Value
Added CVSS V3.1 
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

New CVE Received from kernel.org 5/08/2026 10:16:37 AM

Action Type Old Value New Value
Added Description 
In the Linux kernel, the following vulnerability has been resolved:

mm/page_alloc: clear page->private in free_pages_prepare()

Several subsystems (slub, shmem, ttm, etc.) use page->private but don't
clear it before freeing pages. When these pages are later allocated as
high-order pages and split via split_page(), tail pages retain stale
page->private values.

This causes a use-after-free in the swap subsystem. The swap code uses
page->private to track swap count continuations, assuming freshly
allocated pages have page->private == 0. When stale values are present,
swap_count_continued() incorrectly assumes the continuation list is valid
and iterates over uninitialized page->lru containing LIST_POISON values,
causing a crash:

 KASAN: maybe wild-memory-access in range [0xdead000000000100-0xdead000000000107]
 RIP: 0010:__do_sys_swapoff+0x1151/0x1860

Fix this by clearing page->private in free_pages_prepare(), ensuring all
freed pages have clean state regardless of previous use.
Added Reference 
https://git.kernel.org/stable/c/23b82b7a26182ad840ae67d390d7ec9771e8c00f
Added Reference 
https://git.kernel.org/stable/c/ac1ea219590c09572ed5992dc233bbf7bb70fef9
Added Reference 
https://git.kernel.org/stable/c/d757c793853ec5483eb41ec2942c300b8fa720fb

Quick Info

CVE Dictionary Entry:
CVE-2026-43303
NVD Published Date:
05/08/2026
NVD Last Modified:
06/19/2026
Source:
kernel.org