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CVE-2025-37752· NVD / CVE Program· CNA Linux

net_sched: sch_sfq: move the limit validation

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.30% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1348214fa042a71406964097e743c87a42c85a49, 5e5e1fcc1b8ed57f902c424c5d9b328a3a19073d, 6.1.135.

Low priority for now. Upgrade to Linux Linux 1348214fa042a71406964097e743c87a42c85a49, 5e5e1fcc1b8ed57f902c424c5d9b328a3a19073d, 6.1.135 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Aug 5, 2026
EPSS
0.3% · 21th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • linux linux kernel6.6.76 and later · before 6.6.88
  • linux linux kernel6.12.13 and later · before 6.12.24
  • linux linux kernel6.1.129 and later · before 6.1.135
  • linux linux kernel6.14 and later · before 6.14.3
  • linux linux kernel6.13.2 and later · before 6.13.12
  • linux linux kernel6.15

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.14affected
    • e12f6013d0a69660e8b99bfe381b9546ae667328 and later · before 8fadc871a42933aacb7f1ce9ed9a96485e2c9cf4affected · git
    • 1e6d9d87626cf89eeffb4d943db12cb5b10bf961 and later · before 7d62ded97db6b7c94c891f704151f372b1ba4688affected · git
    • 1b562b7f9231432da40d12e19786c1bd7df653a7 and later · before 6c589aa318023690f1606c666a7fb5f4c1c9c219affected · git
    • 35d0137305ae2f97260a9047f445bd4434bd6cc7 and later · before 1348214fa042a71406964097e743c87a42c85a49affected · git
    • 833e9a1c27b82024db7ff5038a51651f48f05e5e and later · before d2718324f9e329b10ddc091fba5a0ba2b9d4d96aaffected · git
    • 7d8947f2153ee9c5ab4cb17861a11cc45f30e8c4 and later · before f86293adce0c201cfabb283ef9d6f21292089bb8affected · git
    • 7fefc294204f10a3405f175f4ac2be16d63f135e and later · before 5e5e1fcc1b8ed57f902c424c5d9b328a3a19073daffected · git
    • 10685681bafce6febb39770f3387621bf5d67d0b and later · before b36a68192037d1614317a09b0d78c7814e2eecf9affected · git
    • 10685681bafce6febb39770f3387621bf5d67d0b and later · before b3bf8f63e6179076b57c9de660c9f80b5abefe70affected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.135-16.1.135-1
Debian:13linuxbefore 6.12.25-16.12.25-1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_58before 15-2.115-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_60before 13-2.113-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_61before 12-2.112-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_64before 7-2.17-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_66before 5-2.15-2.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_68before 2-2.12-2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_46before 17-150300.2.117-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_47before 15-150300.2.115-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_48before 14-150300.2.114-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_50before 11-150300.2.111-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_54before 5-150300.2.15-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_55before 5-150300.2.15-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_56before 3-150300.2.13-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_57before 3-150300.2.13-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_58before 2-150300.2.12-150300.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_28before 16-150400.2.116-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_34before 10-150400.2.110-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_35before 9-150400.2.19-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_36before 4-150400.2.14-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_38before 3-150400.2.13-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_41before 2-150400.2.12-150400.2.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_20before 12-150500.2.112-150500.2.1

+37

Same product

linux: all records

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1348214fa042a71406964097e743c87a42c85a49Vendor (CNA)
Linux Linux5e5e1fcc1b8ed57f902c424c5d9b328a3a19073dVendor (CNA)
Linux Linux6.1.135Vendor (CNA)
Linux Linux6.12.24Vendor (CNA)
Linux Linux6.13.12Vendor (CNA)
Linux Linux6.6.88Vendor (CNA)
Linux Linux6c589aa318023690f1606c666a7fb5f4c1c9c219Vendor (CNA)
Linux Linux7d62ded97db6b7c94c891f704151f372b1ba4688Vendor (CNA)
Linux Linux8fadc871a42933aacb7f1ce9ed9a96485e2c9cf4Vendor (CNA)
Linux Linuxb36a68192037d1614317a09b0d78c7814e2eecf9Vendor (CNA)
Linux Linuxb3bf8f63e6179076b57c9de660c9f80b5abefe70Vendor (CNA)
Linux Linuxd2718324f9e329b10ddc091fba5a0ba2b9d4d96aVendor (CNA)
Linux Linuxf86293adce0c201cfabb283ef9d6f21292089bb8Vendor (CNA)
debian:linux6.1.135-1 · Debian:12Package registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_4617-150300.2.1 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_4814-150300.2.1 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_563-150300.2.1 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_573-150300.2.1 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-livepatch-SLE15-SP4_Update_3410-150400.2.1 · SUSE:Linux Enterprise Live Patching 15 SP4Package registry (OSV)
suse:kernel-livepatch-SLE15-SP4_Update_383-150400.2.1 · SUSE:Linux Enterprise Live Patching 15 SP4Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6-RT_Update_019-150600.3.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6-RT_Update_112-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6-RT_Update_84-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_6013-2.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_6112-2.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_665-2.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2021-47548342 days apartethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
    39Monitor
  • CVE-2026-64018444 days apartnet: mana: validate rx_req_idx to prevent out-of-bounds array access
    37Monitor
  • CVE-2026-23246321 days apartwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration
    35Monitor
  • CVE-2025-4001413 days apartobjtool, spi: amd: Fix out-of-bounds stack access in amd_set_spi_freq()
    31Monitor
  • CVE-2025-4011413 days apartiio: light: Add check for array bounds in veml6075_read_int_time_ms
    31Monitor
  • CVE-2025-2206715 days apartspi: cadence: Fix out-of-bounds array access in cdns_mrvl_xspi_setup_clock()
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-129 · Improper Validation of Array Index

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records