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CVE-2024-56677— powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()

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powerpc/fadump模块中fadmump_cma_init位置不当导致的CMA内存对齐问题。

CVSS 7.8 · High EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 11ac3e87ce09c27f4587a8c4fe0829d814021a82< aabef6301dcf410dfd2b8759cd413b2a003c7e3f affected
11ac3e87ce09c27f4587a8c4fe0829d814021a82< c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74 affected
11ac3e87ce09c27f4587a8c4fe0829d814021a82< f551637fe9bf863386309e03f9d148d97f535ad1 affected
11ac3e87ce09c27f4587a8c4fe0829d814021a82< 7351c5a6507b4401aeecadb5959131410a339520 affected
11ac3e87ce09c27f4587a8c4fe0829d814021a82< 05b94cae1c47f94588c3e7096963c1007c4d9c1d affected
5.19 affected
< 5.19 unaffected
6.1.120≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2024-56677

Vulnerability Information
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Vulnerability Title
powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init() During early init CMA_MIN_ALIGNMENT_BYTES can be PAGE_SIZE, since pageblock_order is still zero and it gets initialized later during initmem_init() e.g. setup_arch() -> initmem_init() -> sparse_init() -> set_pageblock_order() One such use case where this causes issue is - early_setup() -> early_init_devtree() -> fadump_reserve_mem() -> fadump_cma_init() This causes CMA memory alignment check to be bypassed in cma_init_reserved_mem(). Then later cma_activate_area() can hit a VM_BUG_ON_PAGE(pfn & ((1 << order) - 1)) if the reserved memory area was not pageblock_order aligned. Fix it by moving the fadump_cma_init() after initmem_init(), where other such cma reservations also gets called. <stack trace> ============== page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10010 flags: 0x13ffff800000000(node=1|zone=0|lastcpupid=0x7ffff) CMA raw: 013ffff800000000 5deadbeef0000100 5deadbeef0000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: VM_BUG_ON_PAGE(pfn & ((1 << order) - 1)) ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:778! Call Trace: __free_one_page+0x57c/0x7b0 (unreliable) free_pcppages_bulk+0x1a8/0x2c8 free_unref_page_commit+0x3d4/0x4e4 free_unref_page+0x458/0x6d0 init_cma_reserved_pageblock+0x114/0x198 cma_init_reserved_areas+0x270/0x3e0 do_one_initcall+0x80/0x2f8 kernel_init_freeable+0x33c/0x530 kernel_init+0x34/0x26c ret_from_kernel_user_thread+0x14/0x1c
Source: 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
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powerpc/fadump模块中fadmump_cma_init位置不当导致的CMA内存对齐问题。
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 11ac3e87ce09c27f4587a8c4fe0829d814021a82 ~ aabef6301dcf410dfd2b8759cd413b2a003c7e3f -
Linux Linux 5.19 -

II. Public POCs for CVE-2024-56677

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III. Intelligence Information for CVE-2024-56677

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Patches & Fixes for CVE-2024-56677 (5)

Same Patch Batch · Linux · 2024-12-28 · 32 CVEs total

CVE-2024-56704 8.4 HIGH 9p/xen: fix release of IRQ
CVE-2024-56684 8.4 HIGH mailbox: mtk-cmdq: fix wrong use of sizeof in cmdq_get_clocks()
CVE-2024-56681 7.8 HIGH crypto: bcm - add error check in the ahash_hmac_init function
CVE-2024-56706 7.8 HIGH s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex
CVE-2024-56692 7.8 HIGH f2fs: fix to do sanity check on node blkaddr in truncate_node()
CVE-2024-56693 7.8 HIGH brd: defer automatic disk creation until module initialization succeeds
CVE-2024-56694 7.5 HIGH bpf: fix recursive lock when verdict program return SK_PASS
CVE-2024-56703 7.5 HIGH ipv6: Fix soft lockups in fib6_select_path under high next hop churn
CVE-2024-56688 7.5 HIGH sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport
CVE-2024-56701 powerpc/pseries: Fix dtl_access_lock to be a rw_semaphore
CVE-2024-56697 drm/amdgpu: Fix the memory allocation issue in amdgpu_discovery_get_nps_info()
CVE-2024-56698 usb: dwc3: gadget: Fix looping of queued SG entries
CVE-2024-56699 s390/pci: Fix potential double remove of hotplug slot
CVE-2024-56700 media: wl128x: Fix atomicity violation in fmc_send_cmd()
CVE-2024-56702 bpf: Mark raw_tp arguments with PTR_MAYBE_NULL
CVE-2024-56708 EDAC/igen6: Avoid segmentation fault on module unload
CVE-2024-56705 media: atomisp: Add check for rgby_data memory allocation failure
CVE-2024-56707 octeontx2-pf: handle otx2_mbox_get_rsp errors in otx2_dmac_flt.c
CVE-2024-56676 thermal: testing: Initialize some variables annoteded with _free()
CVE-2024-56696 ALSA: core: Fix possible NULL dereference caused by kunit_kzalloc()

Showing top 20 of 32 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56677

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