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CVE-2024-39477— mm/hugetlb: do not call vma_add_reservation upon ENOMEM

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，该漏洞源于如果allocate_file_region_entries函数无法为预留分配file_region结构，则vma_needs_reservation函数可能会返回-ENOMEM。

CVSS 7.8 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux df7a6d1f64056aec572162c5d35ed9ff86ece6f3< aa998f9dcb34c28448f86e8f5490f20d5eb0eac7 affected
df7a6d1f64056aec572162c5d35ed9ff86ece6f3< 8daf9c702ee7f825f0de8600abff764acfedea13 affected
6.9 affected
< 6.9 unaffected
6.9.5≤ 6.9.* unaffected
6.10≤ * unaffected
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I. Basic Information for CVE-2024-39477

Vulnerability Information
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Vulnerability Title
mm/hugetlb: do not call vma_add_reservation upon ENOMEM
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not call vma_add_reservation upon ENOMEM sysbot reported a splat [1] on __unmap_hugepage_range(). This is because vma_needs_reservation() can return -ENOMEM if allocate_file_region_entries() fails to allocate the file_region struct for the reservation. Check for that and do not call vma_add_reservation() if that is the case, otherwise region_abort() and region_del() will see that we do not have any file_regions. If we detect that vma_needs_reservation() returned -ENOMEM, we clear the hugetlb_restore_reserve flag as if this reservation was still consumed, so free_huge_folio() will not increment the resv count. [1] https://lore.kernel.org/linux-mm/0000000000004096100617c58d54@google.com/T/#ma5983bc1ab18a54910da83416b3f89f3c7ee43aa
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，该漏洞源于如果allocate_file_region_entries函数无法为预留分配file_region结构，则vma_needs_reservation函数可能会返回-ENOMEM。
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 df7a6d1f64056aec572162c5d35ed9ff86ece6f3 ~ aa998f9dcb34c28448f86e8f5490f20d5eb0eac7 -
Linux Linux 6.9 -

II. Public POCs for CVE-2024-39477

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III. Intelligence Information for CVE-2024-39477

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Other References for CVE-2024-39477 (2)

Same Patch Batch · Linux · 2024-07-05 · 14 CVEs total

CVE-2024-39480 8.4 HIGH kdb: Fix buffer overflow during tab-complete
CVE-2024-39482 7.8 HIGH bcache: fix variable length array abuse in btree_iter
CVE-2024-39481 7.8 HIGH media: mc: Fix graph walk in media_pipeline_start
CVE-2024-39479 7.8 HIGH drm/i915/hwmon: Get rid of devm
CVE-2024-39478 7.8 HIGH crypto: starfive - Do not free stack buffer
CVE-2024-39472 7.3 HIGH xfs: fix log recovery buffer allocation for the legacy h_size fixup
CVE-2024-39483 7.1 HIGH KVM: SVM: WARN on vNMI + NMI window iff NMIs are outright masked
CVE-2024-39485 media: v4l: async: Properly re-initialise notifier entry in unregister
CVE-2024-39484 mmc: davinci: Don't strip remove function when driver is builtin
CVE-2024-39476 md/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING
CVE-2024-39475 fbdev: savage: Handle err return when savagefb_check_var failed
CVE-2024-39474 mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL
CVE-2024-39473 ASoC: SOF: ipc4-topology: Fix input format query of process modules without base extension

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-39477

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