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CVE-2025-37818— LoongArch: Return NULL from huge_pte_offset() for invalid PMD

EPSS 0.07% · P21
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I. Basic Information for CVE-2025-37818

Vulnerability Information
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Vulnerability Title
LoongArch: Return NULL from huge_pte_offset() for invalid PMD
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: LoongArch: Return NULL from huge_pte_offset() for invalid PMD LoongArch's huge_pte_offset() currently returns a pointer to a PMD slot even if the underlying entry points to invalid_pte_table (indicating no mapping). Callers like smaps_hugetlb_range() fetch this invalid entry value (the address of invalid_pte_table) via this pointer. The generic is_swap_pte() check then incorrectly identifies this address as a swap entry on LoongArch, because it satisfies the "!pte_present() && !pte_none()" conditions. This misinterpretation, combined with a coincidental match by is_migration_entry() on the address bits, leads to kernel crashes in pfn_swap_entry_to_page(). Fix this at the architecture level by modifying huge_pte_offset() to check the PMD entry's content using pmd_none() before returning. If the entry is invalid (i.e., it points to invalid_pte_table), return NULL instead of the pointer to the slot.
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，该漏洞源于无效页表项处理不当，可能导致空指针取消引用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux fa96b57c149061f71a70bd6582d995f6424fbbf4 ~ 34256805720993e37adf6127371a1265aea8376a -
LinuxLinux 5.19 -

II. Public POCs for CVE-2025-37818

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III. Intelligence Information for CVE-2025-37818

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Same Patch Batch · Linux · 2025-05-08 · 33 CVEs total

CVE-2025-37817mcb: fix a double free bug in chameleon_parse_gdd()
CVE-2025-37833net/niu: Niu requires MSIX ENTRY_DATA fields touch before entry reads
CVE-2025-37834mm/vmscan: don't try to reclaim hwpoison folio
CVE-2025-37831cpufreq: apple-soc: Fix null-ptr-deref in apple_soc_cpufreq_get_rate()
CVE-2025-37830cpufreq: scmi: Fix null-ptr-deref in scmi_cpufreq_get_rate()
CVE-2025-37829cpufreq: scpi: Fix null-ptr-deref in scpi_cpufreq_get_rate()
CVE-2025-37828scsi: ufs: mcq: Add NULL check in ufshcd_mcq_abort()
CVE-2025-37826scsi: ufs: core: Add NULL check in ufshcd_mcq_compl_pending_transfer()
CVE-2025-37827btrfs: zoned: return EIO on RAID1 block group write pointer mismatch
CVE-2025-37825nvmet: fix out-of-bounds access in nvmet_enable_port
CVE-2025-37823net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too
CVE-2025-37824tipc: fix NULL pointer dereference in tipc_mon_reinit_self()
CVE-2025-37821sched/eevdf: Fix se->slice being set to U64_MAX and resulting crash
CVE-2025-37822riscv: uprobes: Add missing fence.i after building the XOL buffer
CVE-2025-37820xen-netfront: handle NULL returned by xdp_convert_buff_to_frame()
CVE-2025-37819irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode()
CVE-2025-37800driver core: fix potential NULL pointer dereference in dev_uevent()
CVE-2025-37816mei: vsc: Fix fortify-panic caused by invalid counted_by() use
CVE-2025-37815misc: microchip: pci1xxxx: Fix Kernel panic during IRQ handler registration
CVE-2025-37814tty: Require CAP_SYS_ADMIN for all usages of TIOCL_SELMOUSEREPORT

Showing top 20 of 33 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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