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CVE-2025-71120— SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf

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，该漏洞源于未检查gss_token长度，可能导致空指针取消引用。

CVSS 7.5 · High EPSS 0.53% · P44

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 5866efa8cbfbadf3905072798e96652faf02dbe8< a8f1e445ce3545c90d69c9e8ff8f7821825fe810 affected
5866efa8cbfbadf3905072798e96652faf02dbe8< 4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d affected
5866efa8cbfbadf3905072798e96652faf02dbe8< f9e53f69ac3bc4ef568b08d3542edac02e83fefd affected
5866efa8cbfbadf3905072798e96652faf02dbe8< 7452d53f293379e2c38cfa8ad0694aa46fc4788b affected
5866efa8cbfbadf3905072798e96652faf02dbe8< a2c6f25ab98b423f99ccd94874d655b8bcb01a19 affected
5866efa8cbfbadf3905072798e96652faf02dbe8< 1c8bb965e9b0559ff0f5690615a527c30f651dd8 affected
5866efa8cbfbadf3905072798e96652faf02dbe8< d4b69a6186b215d2dc1ebcab965ed88e8d41768d affected
66ed7b413d31c6ff23901ac4443b1cc1af2f6113 affected
… +12 more rows
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I. Basic Information for CVE-2025-71120

Vulnerability Information
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Vulnerability Title
SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf A zero length gss_token results in pages == 0 and in_token->pages[0] is NULL. The code unconditionally evaluates page_address(in_token->pages[0]) for the initial memcpy, which can dereference NULL even when the copy length is 0. Guard the first memcpy so it only runs when length > 0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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，该漏洞源于未检查gss_token长度，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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5866efa8cbfbadf3905072798e96652faf02dbe8 ~ a8f1e445ce3545c90d69c9e8ff8f7821825fe810 -
Linux Linux 5.5 -

II. Public POCs for CVE-2025-71120

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III. Intelligence Information for CVE-2025-71120

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Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total

CVE-2025-71116 9.1 CRITICAL libceph: make decode_pool() more resilient against corrupted osdmaps
CVE-2025-71112 8.8 HIGH net: hns3: add VLAN id validation before using
CVE-2025-71130 7.8 HIGH drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer
CVE-2025-71126 7.5 HIGH mptcp: avoid deadlock on fallback while reinjecting
CVE-2025-71128 7.5 HIGH erspan: Initialize options_len before referencing options.
CVE-2025-71132 7.5 HIGH smc91x: fix broken irq-context in PREEMPT_RT
CVE-2025-71131 7.5 HIGH crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
CVE-2025-71109 7.1 HIGH MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
CVE-2025-71136 7.1 HIGH media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status()
CVE-2025-71127 7.1 HIGH wifi: mac80211: Discard Beacon frames to non-broadcast address
CVE-2025-71106 fs: PM: Fix reverse check in filesystems_freeze_callback()
CVE-2025-71118 ACPICA: Avoid walking the Namespace if start_node is NULL
CVE-2025-71104 KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer
CVE-2025-71105 f2fs: use global inline_xattr_slab instead of per-sb slab cache
CVE-2025-71103 drm/msm: adreno: fix deferencing ifpc_reglist when not declared
CVE-2025-71113 crypto: af_alg - zero initialize memory allocated via sock_kmalloc
CVE-2025-71114 via_wdt: fix critical boot hang due to unnamed resource allocation
CVE-2025-71115 um: init cpu_tasks[] earlier
CVE-2025-71117 block: Remove queue freezing from several sysfs store callbacks
CVE-2025-71123 ext4: fix string copying in parse_apply_sb_mount_options()

Showing top 20 of 43 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71120

Anonymous User
2026-01-15 06:08:14

Zaproxy alias impedit expedita quisquam pariatur exercitationem. Nemo rerum eveniet dolores rem quia dignissimos.

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