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

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2025-38165— bpf, sockmap: Fix panic when calling skb_linearize

EPSS 0.12% · P31
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2025-38165

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
bpf, sockmap: Fix panic when calling skb_linearize
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix panic when calling skb_linearize The panic can be reproduced by executing the command: ./bench sockmap -c 2 -p 1 -a --rx-verdict-ingress --rx-strp 100000 Then a kernel panic was captured: ''' [ 657.460555] kernel BUG at net/core/skbuff.c:2178! [ 657.462680] Tainted: [W]=WARN [ 657.463287] Workqueue: events sk_psock_backlog ... [ 657.469610] <TASK> [ 657.469738] ? die+0x36/0x90 [ 657.469916] ? do_trap+0x1d0/0x270 [ 657.470118] ? pskb_expand_head+0x612/0xf40 [ 657.470376] ? pskb_expand_head+0x612/0xf40 [ 657.470620] ? do_error_trap+0xa3/0x170 [ 657.470846] ? pskb_expand_head+0x612/0xf40 [ 657.471092] ? handle_invalid_op+0x2c/0x40 [ 657.471335] ? pskb_expand_head+0x612/0xf40 [ 657.471579] ? exc_invalid_op+0x2d/0x40 [ 657.471805] ? asm_exc_invalid_op+0x1a/0x20 [ 657.472052] ? pskb_expand_head+0xd1/0xf40 [ 657.472292] ? pskb_expand_head+0x612/0xf40 [ 657.472540] ? lock_acquire+0x18f/0x4e0 [ 657.472766] ? find_held_lock+0x2d/0x110 [ 657.472999] ? __pfx_pskb_expand_head+0x10/0x10 [ 657.473263] ? __kmalloc_cache_noprof+0x5b/0x470 [ 657.473537] ? __pfx___lock_release.isra.0+0x10/0x10 [ 657.473826] __pskb_pull_tail+0xfd/0x1d20 [ 657.474062] ? __kasan_slab_alloc+0x4e/0x90 [ 657.474707] sk_psock_skb_ingress_enqueue+0x3bf/0x510 [ 657.475392] ? __kasan_kmalloc+0xaa/0xb0 [ 657.476010] sk_psock_backlog+0x5cf/0xd70 [ 657.476637] process_one_work+0x858/0x1a20 ''' The panic originates from the assertion BUG_ON(skb_shared(skb)) in skb_linearize(). A previous commit(see Fixes tag) introduced skb_get() to avoid race conditions between skb operations in the backlog and skb release in the recvmsg path. However, this caused the panic to always occur when skb_linearize is executed. The "--rx-strp 100000" parameter forces the RX path to use the strparser module which aggregates data until it reaches 100KB before calling sockmap logic. The 100KB payload exceeds MAX_MSG_FRAGS, triggering skb_linearize. To fix this issue, just move skb_get into sk_psock_skb_ingress_enqueue. ''' sk_psock_backlog: sk_psock_handle_skb skb_get(skb) <== we move it into 'sk_psock_skb_ingress_enqueue' sk_psock_skb_ingress____________ ↓ | | → sk_psock_skb_ingress_self | sk_psock_skb_ingress_enqueue sk_psock_verdict_apply_________________↑ skb_linearize ''' Note that for verdict_apply path, the skb_get operation is unnecessary so we add 'take_ref' param to control it's behavior.
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，该漏洞源于未正确处理线性化，可能导致内核崩溃。
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 65ad600b9bde68d2d28709943ab00b51ca8f0a1d ~ 4dba44333a11522df54b49aa1f2edfaf6ce35fc7 -
LinuxLinux 6.6 -

II. Public POCs for CVE-2025-38165

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-38165

请登录查看更多情报信息。

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

CVE-2025-38128Bluetooth: MGMT: reject malformed HCI_CMD_SYNC commands
CVE-2025-38126net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping
CVE-2025-38113ACPI: CPPC: Fix NULL pointer dereference when nosmp is used
CVE-2025-38125net: stmmac: make sure that ptp_rate is not 0 before configuring EST
CVE-2025-38124net: fix udp gso skb_segment after pull from frag_list
CVE-2025-38127ice: fix Tx scheduler error handling in XDP callback
CVE-2025-38129page_pool: Fix use-after-free in page_pool_recycle_in_ring
CVE-2025-38130drm/connector: only call HDMI audio helper plugged cb if non-null
CVE-2025-38131coresight: prevent deactivate active config while enabling the config
CVE-2025-38132coresight: holding cscfg_csdev_lock while removing cscfg from csdev
CVE-2025-38122gve: add missing NULL check for gve_alloc_pending_packet() in TX DQO
CVE-2025-38123net: wwan: t7xx: Fix napi rx poll issue
CVE-2025-38121wifi: iwlwifi: mld: avoid panic on init failure
CVE-2025-38119scsi: core: ufs: Fix a hang in the error handler
CVE-2025-38120netfilter: nf_set_pipapo_avx2: fix initial map fill
CVE-2025-38118Bluetooth: MGMT: Fix UAF on mgmt_remove_adv_monitor_complete
CVE-2025-38117Bluetooth: MGMT: Protect mgmt_pending list with its own lock
CVE-2025-38115net_sched: sch_sfq: fix a potential crash on gso_skb handling
CVE-2025-38116wifi: ath12k: fix uaf in ath12k_core_init()
CVE-2025-38114e1000: Move cancel_work_sync to avoid deadlock

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-2025-38165

No comments yet

Leave a comment