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CVE-2025-22005— ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().

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fib_check_nh_v6_gw函数存在内存泄漏问题。

AI Predicted 5.3 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 7dd73168e273938b9e9bb42ca51b0c27d807992b< 16267a5036173d0173377545b4b6021b081d0933 affected
7dd73168e273938b9e9bb42ca51b0c27d807992b< 1bd12dfc058e1e68759d313d7727d68dbc1b8964 affected
7dd73168e273938b9e9bb42ca51b0c27d807992b< 596a883c4ce2d2e9c175f25b98fed3a1f33fea38 affected
7dd73168e273938b9e9bb42ca51b0c27d807992b< 77c41cdbe6bce476e08d3251c0d501feaf10a9f3 affected
7dd73168e273938b9e9bb42ca51b0c27d807992b< 119dcafe36795a15ae53351cbbd6177aaf94ffef affected
7dd73168e273938b9e9bb42ca51b0c27d807992b< 29d91820184d5cbc70f3246d4911d96eaeb930d6 affected
7dd73168e273938b9e9bb42ca51b0c27d807992b< d3d5b4b5ae263c3225db363ba08b937e2e2b0380 affected
7dd73168e273938b9e9bb42ca51b0c27d807992b< 9740890ee20e01f99ff1dde84c63dcf089fabb98 affected
… +10 more rows
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I. Basic Information for CVE-2025-22005

Vulnerability Information
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Vulnerability Title
ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw(). fib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything when it fails. Commit 7dd73168e273 ("ipv6: Always allocate pcpu memory in a fib6_nh") moved fib_nh_common_init() before alloc_percpu_gfp() within fib6_nh_init() but forgot to add cleanup for fib6_nh->nh_common.nhc_pcpu_rth_output in case it fails to allocate fib6_nh->rt6i_pcpu, resulting in memleak. Let's call fib_nh_common_release() and clear nhc_pcpu_rth_output in the error path. Note that we can remove the fib6_nh_release() call in nh_create_ipv6() later in net-next.git.
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fib_check_nh_v6_gw函数存在内存泄漏问题。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 7dd73168e273938b9e9bb42ca51b0c27d807992b ~ 16267a5036173d0173377545b4b6021b081d0933 -
Linux Linux 5.3 -

II. Public POCs for CVE-2025-22005

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2025-22005

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Patches & Fixes for CVE-2025-22005 (2)

Same Patch Batch · Linux · 2025-04-03 · 13 CVEs total

CVE-2025-22004 8.6 HIGH net: atm: fix use after free in lec_send()
CVE-2025-22001 7.8 HIGH accel/qaic: Fix integer overflow in qaic_validate_req()
CVE-2025-21999 7.8 HIGH proc: fix UAF in proc_get_inode()
CVE-2025-22007 Bluetooth: Fix error code in chan_alloc_skb_cb()
CVE-2025-22006 net: ethernet: ti: am65-cpsw: Fix NAPI registration sequence
CVE-2025-22003 can: ucan: fix out of bound read in strscpy() source
CVE-2025-22002 netfs: Call `invalidate_cache` only if implemented
CVE-2025-22000 mm/huge_memory: drop beyond-EOF folios with the right number of refs
CVE-2025-21998 firmware: qcom: uefisecapp: fix efivars registration race
CVE-2025-21997 xsk: fix an integer overflow in xp_create_and_assign_umem()
CVE-2025-21996 drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()
CVE-2025-21995 drm/sched: Fix fence reference count leak

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-22005

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