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CVE-2024-44965— x86/mm: Fix pti_clone_pgtable() alignment assumption

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x86/mm组件存在pti_clone_pgtable()函数的对齐假设错误漏洞。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 16a3fe634f6a568c6234b8747e5d50487fed3526< 18da1b27ce16a14a9b636af9232acb4fb24f4c9e affected
16a3fe634f6a568c6234b8747e5d50487fed3526< 25a727233a40a9b33370eec9f0cad67d8fd312f8 affected
16a3fe634f6a568c6234b8747e5d50487fed3526< d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6 affected
16a3fe634f6a568c6234b8747e5d50487fed3526< 4d143ae782009b43b4f366402e5c37f59d4e4346 affected
16a3fe634f6a568c6234b8747e5d50487fed3526< 5c580c1050bcbc15c3e78090859d798dcf8c9763 affected
16a3fe634f6a568c6234b8747e5d50487fed3526< ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed affected
16a3fe634f6a568c6234b8747e5d50487fed3526< df3eecb5496f87263d171b254ca6e2758ab3c35c affected
16a3fe634f6a568c6234b8747e5d50487fed3526< 41e71dbb0e0a0fe214545fe64af031303a08524c affected
… +10 more rows
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I. Basic Information for CVE-2024-44965

Vulnerability Information
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Vulnerability Title
x86/mm: Fix pti_clone_pgtable() alignment assumption
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard. It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386. These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text? Use the correct increment form for addr to avoid alignment assumptions.
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x86/mm组件存在pti_clone_pgtable()函数的对齐假设错误漏洞。
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 16a3fe634f6a568c6234b8747e5d50487fed3526 ~ 18da1b27ce16a14a9b636af9232acb4fb24f4c9e -
Linux Linux 4.19 -

II. Public POCs for CVE-2024-44965

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III. Intelligence Information for CVE-2024-44965

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Patches & Fixes for CVE-2024-44965 (6)

Same Patch Batch · Linux · 2024-09-04 · 58 CVEs total

CVE-2024-44984 10.0 CRITICAL bnxt_en: Fix double DMA unmapping for XDP_REDIRECT
CVE-2024-44985 9.8 CRITICAL ipv6: prevent possible UAF in ip6_xmit()
CVE-2024-44970 9.8 CRITICAL net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink
CVE-2024-44998 9.8 CRITICAL atm: idt77252: prevent use after free in dequeue_rx()
CVE-2024-44994 8.8 HIGH iommu: Restore lost return in iommu_report_device_fault()
CVE-2024-44988 8.8 HIGH net: dsa: mv88e6xxx: Fix out-of-bound access
CVE-2024-44986 8.1 HIGH ipv6: fix possible UAF in ip6_finish_output2()
CVE-2024-44973 8.1 HIGH mm, slub: do not call do_slab_free for kfence object
CVE-2024-44995 7.8 HIGH net: hns3: fix a deadlock problem when config TC during resetting
CVE-2024-44974 7.8 HIGH mptcp: pm: avoid possible UaF when selecting endp
CVE-2024-44978 7.8 HIGH drm/xe: Free job before xe_exec_queue_put
CVE-2024-44967 7.8 HIGH drm/mgag200: Bind I2C lifetime to DRM device
CVE-2024-44997 7.8 HIGH net: ethernet: mtk_wed: fix use-after-free panic in mtk_wed_setup_tc_block_cb()
CVE-2024-44954 7.8 HIGH ALSA: line6: Fix racy access to midibuf
CVE-2024-45000 7.8 HIGH fs/netfs/fscache_cookie: add missing "n_accesses" check
CVE-2024-44951 7.8 HIGH serial: sc16is7xx: fix TX fifo corruption
CVE-2024-44959 7.8 HIGH tracefs: Use generic inode RCU for synchronizing freeing
CVE-2024-44987 7.8 HIGH ipv6: prevent UAF in ip6_send_skb()
CVE-2024-44949 7.8 HIGH parisc: fix a possible DMA corruption
CVE-2024-44966 7.8 HIGH binfmt_flat: Fix corruption when not offsetting data start

Showing top 20 of 58 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-44965

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