CVE-2024-36943— fs/proc/task_mmu: fix loss of young/dirty bits during pagemap scan
Affected Version Matrix 6
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I. Basic Information for CVE-2024-36943
Vulnerability Information
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Vulnerability Title
fs/proc/task_mmu: fix loss of young/dirty bits during pagemap scan
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/proc/task_mmu: fix loss of young/dirty bits during pagemap scan make_uffd_wp_pte() was previously doing: pte = ptep_get(ptep); ptep_modify_prot_start(ptep); pte = pte_mkuffd_wp(pte); ptep_modify_prot_commit(ptep, pte); But if another thread accessed or dirtied the pte between the first 2 calls, this could lead to loss of that information. Since ptep_modify_prot_start() gets and clears atomically, the following is the correct pattern and prevents any possible race. Any access after the first call would see an invalid pte and cause a fault: pte = ptep_modify_prot_start(ptep); pte = pte_mkuffd_wp(pte); ptep_modify_prot_commit(ptep, pte);
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于在修复页面映射扫描期间存在丢失young/dirty位的问题。
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
II. Public POCs for CVE-2024-36943
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Other References for CVE-2024-36943 (2)
Same Patch Batch · Linux · 2024-05-30 · 93 CVEs total
| CVE-2024-36925 | swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y | |
| CVE-2024-36921 | wifi: iwlwifi: mvm: guard against invalid STA ID on removal | |
| CVE-2024-36918 | bpf: Check bloom filter map value size | |
| CVE-2024-36917 | block: fix overflow in blk_ioctl_discard() | |
| CVE-2024-36914 | drm/amd/display: Skip on writeback when it's not applicable | |
| CVE-2024-36915 | nfc: llcp: fix nfc_llcp_setsockopt() unsafe copies | |
| CVE-2024-36913 | Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails | |
| CVE-2024-36912 | Drivers: hv: vmbus: Track decrypted status in vmbus_gpadl | |
| CVE-2024-36916 | blk-iocost: avoid out of bounds shift | |
| CVE-2024-36924 | scsi: lpfc: Release hbalock before calling lpfc_worker_wake_up() | |
| CVE-2024-36922 | wifi: iwlwifi: read txq->read_ptr under lock | |
| CVE-2024-36927 | ipv4: Fix uninit-value access in __ip_make_skb() | |
| CVE-2024-36926 | powerpc/pseries/iommu: LPAR panics during boot up with a frozen PE | |
| CVE-2024-36928 | s390/qeth: Fix kernel panic after setting hsuid | |
| CVE-2024-36929 | net: core: reject skb_copy(_expand) for fraglist GSO skbs | |
| CVE-2024-36930 | spi: fix null pointer dereference within spi_sync | |
| CVE-2024-36932 | thermal/debugfs: Prevent use-after-free from occurring after cdev removal | |
| CVE-2024-36931 | s390/cio: Ensure the copied buf is NUL terminated | |
| CVE-2024-36933 | nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment(). | |
| CVE-2024-36934 | bna: ensure the copied buf is NUL terminated |
Showing top 20 of 93 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
Same vendor: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
V. Comments for CVE-2024-36943
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