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CVE-2026-43068— 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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_mb_find_by_goal函数可能从损坏的组中分配块，可能导致数据丢失。

AI 预测 7.8 利用难度: 困难 EPSS 0.16% · P5

影响版本矩阵 18

厂商产品 版本范围状态
Linux Linux 163a203ddb36c36d4a1c942aececda0cc8d06aa7< fea6b2e250ff48f10d166011b57a8516ae5438c9 affected
163a203ddb36c36d4a1c942aececda0cc8d06aa7< 0b84571c886719823d537f05f4f07cad6357c4b7 affected
163a203ddb36c36d4a1c942aececda0cc8d06aa7< ffc0a282462d45fee5957621be5afa29752f3b6d affected
163a203ddb36c36d4a1c942aececda0cc8d06aa7< 2d31a5073f86a177edf44015e0dedb0c47cfd6d8 affected
163a203ddb36c36d4a1c942aececda0cc8d06aa7< 9370207b36d26e45a8c8ef0500706d37036edd6b affected
163a203ddb36c36d4a1c942aececda0cc8d06aa7< 1895f7904be71c48f1e6f338b28f24dabd6b8aeb affected
163a203ddb36c36d4a1c942aececda0cc8d06aa7< 1c0d7c4cde38a887c6d74e0c89ddb25226943c78 affected
163a203ddb36c36d4a1c942aececda0cc8d06aa7< 46066e3a06647c5b186cc6334409722622d05c44 affected
… +10 条更多
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一、 漏洞 CVE-2026-43068 基础信息

漏洞信息
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Vulnerability Title
ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal() There's issue as follows: ... EXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117 EXT4-fs (mmcblk0p1): This should not happen!! Data will be lost EXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117 EXT4-fs (mmcblk0p1): This should not happen!! Data will be lost EXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117 EXT4-fs (mmcblk0p1): This should not happen!! Data will be lost EXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117 EXT4-fs (mmcblk0p1): This should not happen!! Data will be lost EXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 2243 at logical offset 0 with max blocks 1 with error 117 EXT4-fs (mmcblk0p1): This should not happen!! Data will be lost EXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 2239 at logical offset 0 with max blocks 1 with error 117 EXT4-fs (mmcblk0p1): This should not happen!! Data will be lost EXT4-fs (mmcblk0p1): error count since last fsck: 1 EXT4-fs (mmcblk0p1): initial error at time 1765597433: ext4_mb_generate_buddy:760 EXT4-fs (mmcblk0p1): last error at time 1765597433: ext4_mb_generate_buddy:760 ... According to the log analysis, blocks are always requested from the corrupted block group. This may happen as follows: ext4_mb_find_by_goal ext4_mb_load_buddy ext4_mb_load_buddy_gfp ext4_mb_init_cache ext4_read_block_bitmap_nowait ext4_wait_block_bitmap ext4_validate_block_bitmap if (!grp || EXT4_MB_GRP_BBITMAP_CORRUPT(grp)) return -EFSCORRUPTED; // There's no logs. if (err) return err; // Will return error ext4_lock_group(ac->ac_sb, group); if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info))) // Unreachable goto out; After commit 9008a58e5dce ("ext4: make the bitmap read routines return real error codes") merged, Commit 163a203ddb36 ("ext4: mark block group as corrupt on block bitmap error") is no real solution for allocating blocks from corrupted block groups. This is because if 'EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info)' is true, then 'ext4_mb_load_buddy()' may return an error. This means that the block allocation will fail. Therefore, check block group if corrupted when ext4_mb_load_buddy() returns error.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_mb_find_by_goal函数可能从损坏的组中分配块，可能导致数据丢失。
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

厂商 产品 影响版本 CPE 订阅
Linux Linux 163a203ddb36c36d4a1c942aececda0cc8d06aa7 ~ fea6b2e250ff48f10d166011b57a8516ae5438c9 -
Linux Linux 3.12 -

二、漏洞 CVE-2026-43068 的公开POC

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三、漏洞 CVE-2026-43068 的情报信息

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CVE-2026-43068 补丁与修复 (8)

同批安全公告 · Linux · 2026-05-05 · 共 15 条

CVE-2026-43067 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2026-43071 9.1 CRITICAL Linux kernel 安全漏洞
CVE-2026-43070 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-43063 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-43060 7.8 HIGH Linux kernel 安全漏洞
CVE-2026-43062 7.1 HIGH Linux kernel 安全漏洞
CVE-2026-43073 Linux kernel 安全漏洞
CVE-2026-43072 Linux kernel 安全漏洞
CVE-2026-43069 Linux kernel 安全漏洞
CVE-2026-43066 Linux kernel 安全漏洞
CVE-2026-43065 Linux kernel 安全漏洞
CVE-2026-43064 Linux kernel 安全漏洞
CVE-2026-43061 Linux kernel 安全漏洞
CVE-2026-43059 Linux kernel 安全漏洞

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43068

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