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CVE-2025-39715— parisc: Revise gateway LWS calls to probe user read access

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，该漏洞源于未正确探测用户读取权限，可能导致特权提升。

AI Predicted 7.8 Difficulty: Hard EPSS 0.15% · P4

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux d0585d742ff2d82accd26c661c60a6d260429c4a< e8b496c52aa0c6572d88db7cab85aeea6f9c194d affected
d0585d742ff2d82accd26c661c60a6d260429c4a< 8bccf47adbf658293528e86960e6d6f736b1c9f7 affected
d0585d742ff2d82accd26c661c60a6d260429c4a< bc0a24c24ceebabb5ba65900e332233d79e625e6 affected
d0585d742ff2d82accd26c661c60a6d260429c4a< 9b6af875baba9c4679b55f4561e201485451305f affected
d0585d742ff2d82accd26c661c60a6d260429c4a< f6334f4ae9a4e962ba74b026e1d965dfdf8cbef8 affected
5.17 affected
< 5.17 unaffected
6.1.149≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-39715

Vulnerability Information
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Vulnerability Title
parisc: Revise gateway LWS calls to probe user read access
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: parisc: Revise gateway LWS calls to probe user read access We use load and stbys,e instructions to trigger memory reference interruptions without writing to memory. Because of the way read access support is implemented, read access interruptions are only triggered at privilege levels 2 and 3. The kernel and gateway page execute at privilege level 0, so this code never triggers a read access interruption. Thus, it is currently possible for user code to execute a LWS compare and swap operation at an address that is read protected at privilege level 3 (PRIV_USER). Fix this by probing read access rights at privilege level 3 and branching to lws_fault if access isn't allowed.
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，该漏洞源于未正确探测用户读取权限，可能导致特权提升。
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 d0585d742ff2d82accd26c661c60a6d260429c4a ~ e8b496c52aa0c6572d88db7cab85aeea6f9c194d -
Linux Linux 5.17 -

II. Public POCs for CVE-2025-39715

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III. Intelligence Information for CVE-2025-39715

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Same Patch Batch · Linux · 2025-09-05 · 60 CVEs total

CVE-2025-39726 9.8 CRITICAL s390/ism: fix concurrency management in ism_cmd()
CVE-2025-39682 9.8 CRITICAL tls: fix handling of zero-length records on the rx_list
CVE-2025-38734 9.8 CRITICAL net/smc: fix UAF on smcsk after smc_listen_out()
CVE-2025-39702 9.8 CRITICAL ipv6: sr: Fix MAC comparison to be constant-time
CVE-2025-39703 9.8 CRITICAL net, hsr: reject HSR frame if skb can't hold tag
CVE-2025-38737 9.8 CRITICAL cifs: Fix oops due to uninitialised variable
CVE-2025-39673 9.8 CRITICAL ppp: fix race conditions in ppp_fill_forward_path
CVE-2025-39704 8.8 HIGH LoongArch: KVM: Fix stack protector issue in send_ipi_data()
CVE-2025-39718 8.4 HIGH vsock/virtio: Validate length in packet header before skb_put()
CVE-2025-39711 7.8 HIGH media: ivsc: Fix crash at shutdown due to missing mei_cldev_disable() calls
CVE-2025-39710 7.8 HIGH media: venus: Add a check for packet size after reading from shared memory
CVE-2025-39696 7.8 HIGH ALSA: hda: tas2781: Fix wrong reference of tasdevice_priv
CVE-2025-39714 7.8 HIGH media: usbtv: Lock resolution while streaming
CVE-2025-39717 7.8 HIGH open_tree_attr: do not allow id-mapping changes without OPEN_TREE_CLONE
CVE-2025-39698 7.8 HIGH io_uring/futex: ensure io_futex_wait() cleans up properly on failure
CVE-2025-39697 7.8 HIGH NFS: Fix a race when updating an existing write
CVE-2025-38731 7.8 HIGH drm/xe: Fix vm_bind_ioctl double free bug
CVE-2025-39691 7.8 HIGH fs/buffer: fix use-after-free when call bh_read() helper
CVE-2025-39689 7.8 HIGH ftrace: Also allocate and copy hash for reading of filter files
CVE-2025-38733 7.8 HIGH s390/mm: Do not map lowcore with identity mapping

Showing top 20 of 60 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39715

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