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CVE-2025-21791— vrf: use RCU protection in l3mdev_l3_out()

EPSS 0.01% · P4

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxa8e3e1a9f02094145580ea7920c6a1d9aabd5539< 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51eaffected
a8e3e1a9f02094145580ea7920c6a1d9aabd5539< 20a3489b396764cc9376e32a9172bee26a89dc3baffected
a8e3e1a9f02094145580ea7920c6a1d9aabd5539< 5bb4228c32261d06e4fbece37ec3828bcc005b6baffected
a8e3e1a9f02094145580ea7920c6a1d9aabd5539< c7574740be8ce68a57d0aece24987b9be2114c3caffected
a8e3e1a9f02094145580ea7920c6a1d9aabd5539< c40cb5c03e37552d6eff963187109e2c3f78ef6faffected
a8e3e1a9f02094145580ea7920c6a1d9aabd5539< 022cac1c693add610ae76ede03adf4d9d5a2cf21affected
a8e3e1a9f02094145580ea7920c6a1d9aabd5539< 7b81425b517accefd46bee854d94954f5c57e019affected
a8e3e1a9f02094145580ea7920c6a1d9aabd5539< 6d0ce46a93135d96b7fa075a94a88fe0da8e8773affected
… +10 more rows
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I. Basic Information for CVE-2025-21791

Vulnerability Information
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Vulnerability Title
vrf: use RCU protection in l3mdev_l3_out()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.
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 资源管理错误漏洞
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，该漏洞源于未使用RCU保护l3mdev_l3_out函数，可能导致释放后重用。
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 a8e3e1a9f02094145580ea7920c6a1d9aabd5539 ~ 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e -
LinuxLinux 4.9 -

II. Public POCs for CVE-2025-21791

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III. Intelligence Information for CVE-2025-21791

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Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-217567.8 HIGHvsock: Keep the binding until socket destruction
CVE-2025-21770iommu: Fix potential memory leak in iopf_queue_remove_device()
CVE-2025-21761openvswitch: use RCU protection in ovs_vport_cmd_fill_info()
CVE-2025-21763neighbour: use RCU protection in __neigh_notify()
CVE-2025-21762arp: use RCU protection in arp_xmit()
CVE-2025-21764ndisc: use RCU protection in ndisc_alloc_skb()
CVE-2025-21765ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21766ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21767clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context
CVE-2025-21769ptp: vmclock: Add .owner to vmclock_miscdev_fops
CVE-2025-21768net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels
CVE-2025-21771sched_ext: Fix incorrect autogroup migration detection
CVE-2025-21776USB: hub: Ignore non-compliant devices with too many configs or interfaces
CVE-2025-21781batman-adv: fix panic during interface removal
CVE-2025-21780drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table()
CVE-2025-21779KVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel
CVE-2025-21778tracing: Do not allow mmap() of persistent ring buffer
CVE-2025-21777ring-buffer: Validate the persistent meta data subbuf array
CVE-2025-21775can: ctucanfd: handle skb allocation failure
CVE-2025-21773can: etas_es58x: fix potential NULL pointer dereference on udev->serial

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21791

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