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CVE-2025-37752— net_sched: sch_sfq: move the limit validation

EPSS 0.04% · P11

Affected Version Matrix 17

VendorProductVersion RangeStatus
LinuxLinuxe12f6013d0a69660e8b99bfe381b9546ae667328< 8fadc871a42933aacb7f1ce9ed9a96485e2c9cf4affected
1e6d9d87626cf89eeffb4d943db12cb5b10bf961< 7d62ded97db6b7c94c891f704151f372b1ba4688affected
1b562b7f9231432da40d12e19786c1bd7df653a7< 6c589aa318023690f1606c666a7fb5f4c1c9c219affected
35d0137305ae2f97260a9047f445bd4434bd6cc7< 1348214fa042a71406964097e743c87a42c85a49affected
833e9a1c27b82024db7ff5038a51651f48f05e5e< d2718324f9e329b10ddc091fba5a0ba2b9d4d96aaffected
7d8947f2153ee9c5ab4cb17861a11cc45f30e8c4< f86293adce0c201cfabb283ef9d6f21292089bb8affected
7fefc294204f10a3405f175f4ac2be16d63f135e< 5e5e1fcc1b8ed57f902c424c5d9b328a3a19073daffected
10685681bafce6febb39770f3387621bf5d67d0b< b36a68192037d1614317a09b0d78c7814e2eecf9affected
… +9 more rows
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I. Basic Information for CVE-2025-37752

Vulnerability Information
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Vulnerability Title
net_sched: sch_sfq: move the limit validation
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: move the limit validation It is not sufficient to directly validate the limit on the data that the user passes as it can be updated based on how the other parameters are changed. Move the check at the end of the configuration update process to also catch scenarios where the limit is indirectly updated, for example with the following configurations: tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 1 depth 1 tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 1 divisor 1 This fixes the following syzkaller reported crash: ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in net/sched/sch_sfq.c:203:6 index 65535 is out of range for type 'struct sfq_head[128]' CPU: 1 UID: 0 PID: 3037 Comm: syz.2.16 Not tainted 6.14.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x201/0x300 lib/dump_stack.c:120 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0xf5/0x120 lib/ubsan.c:429 sfq_link net/sched/sch_sfq.c:203 [inline] sfq_dec+0x53c/0x610 net/sched/sch_sfq.c:231 sfq_dequeue+0x34e/0x8c0 net/sched/sch_sfq.c:493 sfq_reset+0x17/0x60 net/sched/sch_sfq.c:518 qdisc_reset+0x12e/0x600 net/sched/sch_generic.c:1035 tbf_reset+0x41/0x110 net/sched/sch_tbf.c:339 qdisc_reset+0x12e/0x600 net/sched/sch_generic.c:1035 dev_reset_queue+0x100/0x1b0 net/sched/sch_generic.c:1311 netdev_for_each_tx_queue include/linux/netdevice.h:2590 [inline] dev_deactivate_many+0x7e5/0xe70 net/sched/sch_generic.c:1375
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net_sched中sch_sfq队列限制验证不足，可能导致数组越界。
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 e12f6013d0a69660e8b99bfe381b9546ae667328 ~ 8fadc871a42933aacb7f1ce9ed9a96485e2c9cf4 -
LinuxLinux 6.14 -

II. Public POCs for CVE-2025-37752

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III. Intelligence Information for CVE-2025-37752

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Patch · 6

Same Patch Batch · Linux · 2025-05-01 · 245 CVEs total

CVE-2022-49854mctp: Fix an error handling path in mctp_init()
CVE-2022-49837bpf: Fix memory leaks in __check_func_call
CVE-2022-49838sctp: clear out_curr if all frag chunks of current msg are pruned
CVE-2022-49840bpf, test_run: Fix alignment problem in bpf_prog_test_run_skb()
CVE-2022-49839scsi: scsi_transport_sas: Fix error handling in sas_phy_add()
CVE-2022-49841serial: imx: Add missing .thaw_noirq hook
CVE-2022-49842ASoC: core: Fix use-after-free in snd_soc_exit()
CVE-2022-49844can: dev: fix skb drop check
CVE-2022-49845can: j1939: j1939_send_one(): fix missing CAN header initialization
CVE-2022-49846udf: Fix a slab-out-of-bounds write bug in udf_find_entry()
CVE-2022-49847net: ethernet: ti: am65-cpsw: Fix segmentation fault at module unload
CVE-2022-49849btrfs: fix match incorrectly in dev_args_match_device
CVE-2022-49848phy: qcom-qmp-combo: fix NULL-deref on runtime resume
CVE-2022-49850nilfs2: fix deadlock in nilfs_count_free_blocks()
CVE-2022-49851riscv: fix reserved memory setup
CVE-2022-49852riscv: process: fix kernel info leakage
CVE-2022-49862tipc: fix the msg->req tlv len check in tipc_nl_compat_name_table_dump_header
CVE-2022-49864drm/amdkfd: Fix NULL pointer dereference in svm_migrate_to_ram()
CVE-2022-49865ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network
CVE-2022-49863can: af_can: fix NULL pointer dereference in can_rx_register()

Showing top 20 of 245 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-37752

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