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CVE-2024-43914— md/raid5: avoid BUG_ON() while continue reshape after reassembling

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于在执行reshape操作时，未能正确处理--revert-reshape参数。

AI Predicted 3.3 Difficulty: Hard EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ec32a2bd35bd6b933a5db6542c48210ce069a376< 2c92f8c1c456d556f15cbf51667b385026b2e6a0 affected
ec32a2bd35bd6b933a5db6542c48210ce069a376< 6b33c468d543f6a83de2d61f09fec74b27e19fd2 affected
ec32a2bd35bd6b933a5db6542c48210ce069a376< c384dd4f1fb3b14a2fd199360701cc163ea88705 affected
ec32a2bd35bd6b933a5db6542c48210ce069a376< bf0ff69a42a3d2d46876d0514ecf13dffc516666 affected
ec32a2bd35bd6b933a5db6542c48210ce069a376< 3b33740c1750a39e046339ff9240e954f0156707 affected
ec32a2bd35bd6b933a5db6542c48210ce069a376< 775a9ba16c9ffe98fe54ebf14e55d5660f2bf600 affected
ec32a2bd35bd6b933a5db6542c48210ce069a376< 4811d6e5d9f4090c3e0ff9890eb24077108046ab affected
ec32a2bd35bd6b933a5db6542c48210ce069a376< 305a5170dc5cf3d395bb4c4e9239bca6d0b54b49 affected
… +10 more rows
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I. Basic Information for CVE-2024-43914

Vulnerability Information
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Vulnerability Title
md/raid5: avoid BUG_ON() while continue reshape after reassembling
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: md/raid5: avoid BUG_ON() while continue reshape after reassembling Currently, mdadm support --revert-reshape to abort the reshape while reassembling, as the test 07revert-grow. However, following BUG_ON() can be triggerred by the test: kernel BUG at drivers/md/raid5.c:6278! invalid opcode: 0000 [#1] PREEMPT SMP PTI irq event stamp: 158985 CPU: 6 PID: 891 Comm: md0_reshape Not tainted 6.9.0-03335-g7592a0b0049a #94 RIP: 0010:reshape_request+0x3f1/0xe60 Call Trace: <TASK> raid5_sync_request+0x43d/0x550 md_do_sync+0xb7a/0x2110 md_thread+0x294/0x2b0 kthread+0x147/0x1c0 ret_from_fork+0x59/0x70 ret_from_fork_asm+0x1a/0x30 </TASK> Root cause is that --revert-reshape update the raid_disks from 5 to 4, while reshape position is still set, and after reassembling the array, reshape position will be read from super block, then during reshape the checking of 'writepos' that is caculated by old reshape position will fail. Fix this panic the easy way first, by converting the BUG_ON() to WARN_ON(), and stop the reshape if checkings fail. Noted that mdadm must fix --revert-shape as well, and probably md/raid should enhance metadata validation as well, however this means reassemble will fail and there must be user tools to fix the wrong metadata.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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，该漏洞源于在执行reshape操作时，未能正确处理--revert-reshape参数。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux ec32a2bd35bd6b933a5db6542c48210ce069a376 ~ 2c92f8c1c456d556f15cbf51667b385026b2e6a0 -
Linux Linux 2.6.30 -

II. Public POCs for CVE-2024-43914

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III. Intelligence Information for CVE-2024-43914

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Other References for CVE-2024-43914 (8)

Same Patch Batch · Linux · 2024-08-26 · 39 CVEs total

CVE-2024-44942 7.8 HIGH f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC
CVE-2024-43910 7.8 HIGH bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses
CVE-2024-44934 7.8 HIGH net: bridge: mcast: wait for previous gc cycles when removing port
CVE-2024-43897 7.8 HIGH net: drop bad gso csum_start and offset in virtio_net_hdr
CVE-2024-43892 7.8 HIGH memcg: protect concurrent access to mem_cgroup_idr
CVE-2024-43891 7.8 HIGH tracing: Have format file honor EVENT_FILE_FL_FREED
CVE-2024-44939 7.8 HIGH jfs: fix null ptr deref in dtInsertEntry
CVE-2024-43888 7.8 HIGH mm: list_lru: fix UAF for memory cgroup
CVE-2024-44941 7.8 HIGH f2fs: fix to cover read extent cache access with lock
CVE-2024-44940 7.5 HIGH fou: remove warn in gue_gro_receive on unsupported protocol
CVE-2024-44933 7.3 HIGH bnxt_en : Fix memory out-of-bounds in bnxt_fill_hw_rss_tbl()
CVE-2024-43913 7.0 HIGH nvme: apple: fix device reference counting
CVE-2024-44938 jfs: Fix shift-out-of-bounds in dbDiscardAG
CVE-2024-44937 platform/x86: intel-vbtn: Protect ACPI notify handler against recursion
CVE-2024-44936 power: supply: rt5033: Bring back i2c_set_clientdata
CVE-2024-44935 sctp: Fix null-ptr-deref in reuseport_add_sock().
CVE-2024-44932 idpf: fix UAFs when destroying the queues
CVE-2024-44931 gpio: prevent potential speculation leaks in gpio_device_get_desc()
CVE-2024-43912 wifi: nl80211: disallow setting special AP channel widths
CVE-2024-43911 wifi: mac80211: fix NULL dereference at band check in starting tx ba session

Showing top 20 of 39 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-43914

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