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CVE-2025-39859— ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog

EPSS 0.02% · P6
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I. Basic Information for CVE-2025-39859

Vulnerability Information
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Vulnerability Title
ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog The ptp_ocp_detach() only shuts down the watchdog timer if it is pending. However, if the timer handler is already running, the timer_delete_sync() is not called. This leads to race conditions where the devlink that contains the ptp_ocp is deallocated while the timer handler is still accessing it, resulting in use-after-free bugs. The following details one of the race scenarios. (thread 1) | (thread 2) ptp_ocp_remove() | ptp_ocp_detach() | ptp_ocp_watchdog() if (timer_pending(&bp->watchdog))| bp = timer_container_of() timer_delete_sync() | | devlink_free(devlink) //free | | bp-> //use Resolve this by unconditionally calling timer_delete_sync() to ensure the timer is reliably deactivated, preventing any access after free.
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ptp_ocp_watchdog存在释放后重用问题，可能导致内存损坏。
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 773bda96492153e11d21eb63ac814669b51fc701 ~ f10d3c7267ac7387a5129d5506c3c5f2460cfd9b -
LinuxLinux 5.15 -

II. Public POCs for CVE-2025-39859

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III. Intelligence Information for CVE-2025-39859

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Same Patch Batch · Linux · 2025-09-19 · 30 CVEs total

CVE-2025-39852net/tcp: Fix socket memory leak in TCP-AO failure handling for IPv6
CVE-2025-39837platform/x86: asus-wmi: Fix racy registrations
CVE-2025-39838cifs: prevent NULL pointer dereference in UTF16 conversion
CVE-2025-39839batman-adv: fix OOB read/write in network-coding decode
CVE-2025-39840audit: fix out-of-bounds read in audit_compare_dname_path()
CVE-2025-39841scsi: lpfc: Fix buffer free/clear order in deferred receive path
CVE-2025-39842ocfs2: prevent release journal inode after journal shutdown
CVE-2025-39844mm: move page table sync declarations to linux/pgtable.h
CVE-2025-39843mm: slub: avoid wake up kswapd in set_track_prepare
CVE-2025-39845x86/mm/64: define ARCH_PAGE_TABLE_SYNC_MASK and arch_sync_kernel_mappings()
CVE-2025-39846pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region()
CVE-2025-39847ppp: fix memory leak in pad_compress_skb
CVE-2025-39848ax25: properly unshare skbs in ax25_kiss_rcv()
CVE-2025-39849wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result()
CVE-2025-39850vxlan: Fix NPD in {arp,neigh}_reduce() when using nexthop objects
CVE-2025-39866fs: writeback: fix use-after-free in __mark_inode_dirty()
CVE-2025-39851vxlan: Fix NPD when refreshing an FDB entry with a nexthop object
CVE-2025-39853i40e: Fix potential invalid access when MAC list is empty
CVE-2025-39854ice: fix NULL access of tx->in_use in ice_ll_ts_intr
CVE-2025-39856net: ethernet: ti: am65-cpsw-nuss: Fix null pointer dereference for ndev

Showing top 20 of 30 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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