cbcvebase.
CVE-2025-37752
published 2025-05-01

CVE-2025-37752: 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…

PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.23%
14.2th percentile
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: __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

Affected

33 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.135-1 (bookworm)linux 6.1.135-1 (bookworm)
debianlinux-6.1< linux 6.1.135-1 (bookworm)linux 6.1.135-1 (bookworm)
googlechrome_chrome
linuxlinux
linuxlinux>= 10685681bafce6febb39770f3387621bf5d67d0b < b36a68192037d1614317a09b0d78c7814e2eecf9b36a68192037d1614317a09b0d78c7814e2eecf9
linuxlinux>= 10685681bafce6febb39770f3387621bf5d67d0b < b3bf8f63e6179076b57c9de660c9f80b5abefe70b3bf8f63e6179076b57c9de660c9f80b5abefe70
linuxlinux>= 1b562b7f9231432da40d12e19786c1bd7df653a7 < 6c589aa318023690f1606c666a7fb5f4c1c9c2196c589aa318023690f1606c666a7fb5f4c1c9c219
linuxlinux>= 1e6d9d87626cf89eeffb4d943db12cb5b10bf961 < 7d62ded97db6b7c94c891f704151f372b1ba46887d62ded97db6b7c94c891f704151f372b1ba4688
linuxlinux>= 35d0137305ae2f97260a9047f445bd4434bd6cc7 < 1348214fa042a71406964097e743c87a42c85a491348214fa042a71406964097e743c87a42c85a49
linuxlinux>= 6.1.129 < 6.1.1356.1.135
linuxlinux>= 6.12.13 < 6.12.246.12.24
linuxlinux>= 6.13.2 < 6.13.126.13.12
linuxlinux>= 6.6.76 < 6.6.886.6.88
linuxlinux>= 7d8947f2153ee9c5ab4cb17861a11cc45f30e8c4 < f86293adce0c201cfabb283ef9d6f21292089bb8f86293adce0c201cfabb283ef9d6f21292089bb8
linuxlinux>= 7fefc294204f10a3405f175f4ac2be16d63f135e < 5e5e1fcc1b8ed57f902c424c5d9b328a3a19073d5e5e1fcc1b8ed57f902c424c5d9b328a3a19073d
linuxlinux>= 833e9a1c27b82024db7ff5038a51651f48f05e5e < d2718324f9e329b10ddc091fba5a0ba2b9d4d96ad2718324f9e329b10ddc091fba5a0ba2b9d4d96a
linuxlinux>= e12f6013d0a69660e8b99bfe381b9546ae667328 < 8fadc871a42933aacb7f1ce9ed9a96485e2c9cf48fadc871a42933aacb7f1ce9ed9a96485e2c9cf4
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.135-16.1.135-1
linuxlinux_kernel>= 0 < 6.12.25-16.12.25-1
linuxlinux_kernel>= 0 < 6.12.25-16.12.25-1
linuxlinux_kernel>= 0 < 5.15.0-153.1635.15.0-153.163
linuxlinux_kernel>= 0 < 6.8.0-79.796.8.0-79.79
linuxlinux_kernel>= 0 < 6.14.0-22.226.14.0-22.22

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.4HIGH
vendor_ubuntu8.4HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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