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CVE-2025-38588— ipv6: prevent infinite loop in rt6_nlmsg_size()

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ipv6模块在rt6_nlmsg_size函数中可能导致无限循环。

AI Predicted 4.4 Difficulty: Easy EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 19

VendorProduct Version RangeStatus
Linux Linux d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2< 6d345136c9b875f065d226908a29c25cdf9343f8 affected
52da02521ede55fb86546c3fffd9377b3261b91f< e1b7932af47f92432be8303d2439d1bf77b0be23 affected
34a949e7a0869dfa31a40416d2a56973fae1807b< cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38 affected
d9ccb18f83ea2bb654289b6ecf014fd267cc988b< 3c13db3e47e170bab19e574404e7b6be45ea873d affected
d9ccb18f83ea2bb654289b6ecf014fd267cc988b< 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab affected
d9ccb18f83ea2bb654289b6ecf014fd267cc988b< 54e6fe9dd3b0e7c481c2228782c9494d653546da affected
11edcd026012ac18acee0f1514db3ed1b160fc6f affected
6.1.128< 6.1.148 affected
… +11 more rows
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I. Basic Information for CVE-2025-38588

Vulnerability Information
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Vulnerability Title
ipv6: prevent infinite loop in rt6_nlmsg_size()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent infinite loop in rt6_nlmsg_size() While testing prior patch, I was able to trigger an infinite loop in rt6_nlmsg_size() in the following place: list_for_each_entry_rcu(sibling, &f6i->fib6_siblings, fib6_siblings) { rt6_nh_nlmsg_size(sibling->fib6_nh, &nexthop_len); } This is because fib6_del_route() and fib6_add_rt2node() uses list_del_rcu(), which can confuse rcu readers, because they might no longer see the head of the list. Restart the loop if f6i->fib6_nsiblings is zero.
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ipv6模块在rt6_nlmsg_size函数中可能导致无限循环。
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 d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 ~ 6d345136c9b875f065d226908a29c25cdf9343f8 -
Linux Linux 6.13 -

II. Public POCs for CVE-2025-38588

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III. Intelligence Information for CVE-2025-38588

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Patches & Fixes for CVE-2025-38588 (1)

Same Patch Batch · Linux · 2025-08-19 · 59 CVEs total

CVE-2025-38561 9.8 CRITICAL ksmbd: fix Preauh_HashValue race condition
CVE-2025-38566 9.8 CRITICAL sunrpc: fix handling of server side tls alerts
CVE-2025-38560 9.3 CRITICAL x86/sev: Evict cache lines during SNP memory validation
CVE-2025-38601 8.8 HIGH wifi: ath11k: clear initialized flag for deinit-ed srng lists
CVE-2025-38600 8.8 HIGH wifi: mt76: mt7925: fix off by one in mt7925_mcu_hw_scan()
CVE-2025-38599 8.8 HIGH wifi: mt76: mt7996: Fix possible OOB access in mt7996_tx()
CVE-2025-38592 8.8 HIGH Bluetooth: hci_devcd_dump: fix out-of-bounds via dev_coredumpv
CVE-2025-38608 8.6 HIGH bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls
CVE-2025-38574 8.6 HIGH pptp: ensure minimal skb length in pptp_xmit()
CVE-2025-38571 8.2 HIGH sunrpc: fix client side handling of tls alerts
CVE-2025-38615 7.8 HIGH fs/ntfs3: cancle set bad inode after removing name fails
CVE-2025-38579 7.8 HIGH f2fs: fix KMSAN uninit-value in extent_info usage
CVE-2025-38604 7.8 HIGH wifi: rtl818x: Kill URBs before clearing tx status queue
CVE-2025-38607 7.8 HIGH bpf: handle jset (if a & b ...) as a jump in CFG computation
CVE-2025-38614 7.8 HIGH eventpoll: Fix semi-unbounded recursion
CVE-2025-38593 7.8 HIGH Bluetooth: hci_sync: fix double free in 'hci_discovery_filter_clear()'
CVE-2025-38586 7.8 HIGH bpf, arm64: Fix fp initialization for exception boundary
CVE-2025-38582 7.8 HIGH RDMA/hns: Fix double destruction of rsv_qp
CVE-2025-38580 7.8 HIGH ext4: fix inode use after free in ext4_end_io_rsv_work()
CVE-2025-38555 7.8 HIGH usb: gadget : fix use-after-free in composite_dev_cleanup()

Showing top 20 of 59 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38588

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