Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2026-23304— ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu()

EPSS 0.03% · P10
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-23304

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu() l3mdev_master_dev_rcu() can return NULL when the slave device is being un-slaved from a VRF. All other callers deal with this, but we lost the fallback to loopback in ip6_rt_pcpu_alloc() -> ip6_rt_get_dev_rcu() with commit 4832c30d5458 ("net: ipv6: put host and anycast routes on device with address"). KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] RIP: 0010:ip6_rt_pcpu_alloc (net/ipv6/route.c:1418) Call Trace: ip6_pol_route (net/ipv6/route.c:2318) fib6_rule_lookup (net/ipv6/fib6_rules.c:115) ip6_route_output_flags (net/ipv6/route.c:2607) vrf_process_v6_outbound (drivers/net/vrf.c:437) I was tempted to rework the un-slaving code to clear the flag first and insert synchronize_rcu() before we remove the upper. But looks like the explicit fallback to loopback_dev is an established pattern. And I guess avoiding the synchronize_rcu() is nice, too.
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 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，该漏洞源于未处理从VRF解绑从设备的情况，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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 4832c30d5458387ff2533ff66fbde26ad8bb5a2d ~ d542e2ac7f9e288d49735be0775611547ca4e0ee -
LinuxLinux 4.14 -

II. Public POCs for CVE-2026-23304

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-23304

请登录查看更多情报信息。

Same Patch Batch · Linux · 2026-03-25 · 116 CVEs total

CVE-2026-233958.8 HIGHBluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ
CVE-2026-317888.2 HIGHxen/privcmd: restrict usage in unprivileged domU
CVE-2026-232807.8 HIGHaccel/amdxdna: Prevent ubuf size overflow
CVE-2026-233177.8 HIGHdrm/vmwgfx: Return the correct value in vmw_translate_ptr functions
CVE-2026-233937.8 HIGHbridge: cfm: Fix race condition in peer_mep deletion
CVE-2026-233927.8 HIGHnetfilter: nf_tables: release flowtable after rcu grace period on error
CVE-2026-233917.8 HIGHnetfilter: xt_CT: drop pending enqueued packets on template removal
CVE-2026-233407.8 HIGHnet: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs
CVE-2026-233727.8 HIGHnfc: rawsock: cancel tx_work before socket teardown
CVE-2026-233067.8 HIGHscsi: pm8001: Fix use-after-free in pm8001_queue_command()
CVE-2026-232887.8 HIGHaccel/amdxdna: Fix out-of-bounds memset in command slot handling
CVE-2026-233787.8 HIGHnet/sched: act_ife: Fix metalist update behavior
CVE-2026-233367.8 HIGHwifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
CVE-2026-233517.8 HIGHnetfilter: nft_set_pipapo: split gc into unlink and reclaim phase
CVE-2026-233837.8 HIGHbpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
CVE-2026-233507.8 HIGHdrm/xe/queue: Call fini on exec queue creation fail
CVE-2026-233647.4 HIGHksmbd: Compare MACs in constant time
CVE-2026-232947.0 HIGHbpf: Fix race in devmap on PREEMPT_RT
CVE-2026-23358drm/amdgpu: Fix error handling in slot reset
CVE-2026-23357can: mcp251x: fix deadlock in error path of mcp251x_open

Showing top 20 of 116 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23304

No comments yet

Leave a comment