CVE-2026-89760— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于swap_free_hibernation_slot()未检查交换缓存中是否仍存在folio即释放休眠槽位，导致交换表中该条目被清除且偏移量被回收重用，可能造成内存损坏、进程崩溃或数据不稳定，通常在uswsusp准备休眠镜像时触发。
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一、 漏洞 CVE-2026-89760 基础信息
漏洞信息
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Vulnerability Title
mm, swap: don't free a hibernation slot that is in the swap cache
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mm, swap: don't free a hibernation slot that is in the swap cache
A slot with a folio in the swap cache is freed when the folio leaves the
cache, not when its count drops. swap_put_entries_cluster() follows that
rule. swap_free_hibernation_slot() does not, it calls
__swap_cluster_free_entries() whether or not a folio sits on the slot.
Cluster readahead can put one there. It walks a raw page_cluster sized
window of offsets around the faulting entry, and a hibernation slot passes
__swap_cache_add_check() because it is not a folio and its count is not
zero. Freeing the slot then clears the entry under that folio.
The folio is now unreachable from the swap table, and the offset goes back
to the allocator. The folio is still on the LRU though, so reclaim can
pick it up later. It then takes the old offset out of folio->swap and
overwrites the table entry there, which by then may belong to someone
else.
This bug can trigger silent memory corruption, process crashes, or data
instability across completely unrelated userspace applications - typically
occurring when uswsusp is preparing the hibernation image.
I found this while working on giving hibernation slots their own marker in
the swap table, which I had discussed with Kairui.
(https://lore.kernel.org/linux-mm/abp7aDgYLrxF3Me8@KASONG-MC4/) As far as
I know there are no reports, so there is no Reported-by/Closes to add.
Check for a cached folio before freeing. The slot is then left in the
ordinary state where only the swap cache holds it, and it is freed when
the folio leaves the cache, either through the reclaim below or through
normal reclaim later.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于swap_free_hibernation_slot()未检查交换缓存中是否仍存在folio即释放休眠槽位，导致交换表中该条目被清除且偏移量被回收重用，可能造成内存损坏、进程崩溃或数据不稳定，通常在uswsusp准备休眠镜像时触发。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-89760 的公开POC
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CVE-2026-89760 补丁与修复 (2)
同批安全公告 · Linux · 2026-09-11 · 共 431 条
| CVE-2026-89669 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89536 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89533 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-81002 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89643 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89526 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89652 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89651 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89653 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89654 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89656 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89655 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89712 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89658 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89660 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89659 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89708 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89662 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89689 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89686 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 431 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-89760
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