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CVE-2025-38112— net: Fix TOCTOU issue in sk_is_readable()

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sk_is_readable函数存在TOCTOU问题，可能导致空指针取消引用。

AI Predicted 4.9 Difficulty: Hard EPSS 0.14% · P3

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 8934ce2fd08171e8605f7fada91ee7619fe17ab8< c2b26638476baee154920bb587fc94ff1bf04336 affected
8934ce2fd08171e8605f7fada91ee7619fe17ab8< 6fa68d7eab34d448a61aa24ea31e68b3231ed20d affected
8934ce2fd08171e8605f7fada91ee7619fe17ab8< 8926a7ef1977a832dd6bf702f1a99303dbf15b15 affected
8934ce2fd08171e8605f7fada91ee7619fe17ab8< ff55c85a923e043d59d26b20a673a1b4a219c310 affected
8934ce2fd08171e8605f7fada91ee7619fe17ab8< 1e0de7582ceccbdbb227d4e0ddf65732f92526da affected
8934ce2fd08171e8605f7fada91ee7619fe17ab8< 1b367ba2f94251822577daed031d6b9a9e11ba91 affected
8934ce2fd08171e8605f7fada91ee7619fe17ab8< 2660a544fdc0940bba15f70508a46cf9a6491230 affected
4.17 affected
… +8 more rows
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I. Basic Information for CVE-2025-38112

Vulnerability Information
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Vulnerability Title
net: Fix TOCTOU issue in sk_is_readable()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: Fix TOCTOU issue in sk_is_readable() sk->sk_prot->sock_is_readable is a valid function pointer when sk resides in a sockmap. After the last sk_psock_put() (which usually happens when socket is removed from sockmap), sk->sk_prot gets restored and sk->sk_prot->sock_is_readable becomes NULL. This makes sk_is_readable() racy, if the value of sk->sk_prot is reloaded after the initial check. Which in turn may lead to a null pointer dereference. Ensure the function pointer does not turn NULL after the check.
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sk_is_readable函数存在TOCTOU问题，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 8934ce2fd08171e8605f7fada91ee7619fe17ab8 ~ c2b26638476baee154920bb587fc94ff1bf04336 -
Linux Linux 4.17 -

II. Public POCs for CVE-2025-38112

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III. Intelligence Information for CVE-2025-38112

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Patches & Fixes for CVE-2025-38112 (1)

Same Patch Batch · Linux · 2025-07-03 · 78 CVEs total

CVE-2025-38123 9.8 CRITICAL net: wwan: t7xx: Fix napi rx poll issue
CVE-2025-38139 9.8 CRITICAL netfs: Fix oops in write-retry from mis-resetting the subreq iterator
CVE-2025-38120 9.4 CRITICAL netfilter: nf_set_pipapo_avx2: fix initial map fill
CVE-2025-38146 9.4 CRITICAL net: openvswitch: Fix the dead loop of MPLS parse
CVE-2025-38116 7.8 HIGH wifi: ath12k: fix uaf in ath12k_core_init()
CVE-2025-38161 7.8 HIGH RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction
CVE-2025-38154 7.8 HIGH bpf, sockmap: Avoid using sk_socket after free when sending
CVE-2025-38106 7.8 HIGH io_uring: fix use-after-free of sq->thread in __io_uring_show_fdinfo()
CVE-2025-38150 7.8 HIGH af_packet: move notifier's packet_dev_mc out of rcu critical section
CVE-2025-38108 7.8 HIGH net_sched: red: fix a race in __red_change()
CVE-2025-38110 7.8 HIGH net/mdiobus: Fix potential out-of-bounds clause 45 read/write access
CVE-2025-38111 7.8 HIGH net/mdiobus: Fix potential out-of-bounds read/write access
CVE-2025-38141 7.8 HIGH dm: fix dm_blk_report_zones
CVE-2025-38107 7.8 HIGH net_sched: ets: fix a race in ets_qdisc_change()
CVE-2025-38115 7.8 HIGH net_sched: sch_sfq: fix a potential crash on gso_skb handling
CVE-2025-38117 7.8 HIGH Bluetooth: MGMT: Protect mgmt_pending list with its own lock
CVE-2025-38118 7.8 HIGH Bluetooth: MGMT: Fix UAF on mgmt_remove_adv_monitor_complete
CVE-2025-38133 7.8 HIGH iio: adc: ad4851: fix ad4858 chan pointer handling
CVE-2025-38129 7.8 HIGH page_pool: Fix use-after-free in page_pool_recycle_in_ring
CVE-2025-38127 7.8 HIGH ice: fix Tx scheduler error handling in XDP callback

Showing top 20 of 78 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38112

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