CVE-2025-68325: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-68325DEBIAN-CVE-2025-68325
Published 18-12-2025Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2025-68325 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 8.9% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 46 · Related 44
DLA-4475-1DLA-4476-1DSA-6127-1OPENSUSE-SU-2025:15836-1OPENSUSE-SU-2026:10301-1OPENSUSE-SU-2026:20287-1

Timeline

  1. 18-12-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop In cake_drop(), qdisc_tree_reduce_backlog() is used to update the qlen and backlog of the qdisc hierarchy. Its caller, cake_enqueue(), assumes that the parent qdisc will enqueue the current packet. However, this assumption breaks when cake_enqueue() returns NET_XMIT_CN: the parent qdisc stops enqueuing current packet, leaving the tree qlen/backlog accounting inconsistent. This mismatch can lead to a NULL dereference (e.g., when the parent Qdisc is qfq_qdisc). This patch computes the qlen/backlog delta in a more robust way by observing the difference before and after the series of cake_drop() calls, and then compensates the qdisc tree accounting if cake_enqueue() returns NET_XMIT_CN. To ensure correct compensation when ACK thinning is enabled, a new variable is introduced to keep qlen unchanged.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu134 products
  • linux< 5.15.0-173.183 | < 6.8.0-110.110 | < 6.17.0-19.19
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1103.110 | < 6.8.0-1052.55 | < 6.17.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.162-1 | < 6.12.63-1 | < 6.17.13-1
Linux1 product
  • linux≥ de04ddd2980b48caa8d7e24a7db2742917a8b280, < a3f4e3de41a3f115db35276c6b186ccbc913934a | ≥ 0dacfc5372e314d1219f03e64dde3ab495a5a25e, < 38abf6e931b169ea88d7529b49096f53a5dcf8fe | ≥ 710866fc0a64eafcb8bacd91bcb1329eb7e5035f, < fcb91be52eb6e92e00b533ebd7c77fecada537e1 | ≥ aa12ee1c1bd260943fd6ab556d8635811c332eeb, < d01f0e072dadb02fe10f436b940dd957aff0d7d4 | ≥ ff57186b2cc39766672c4c0332323933e5faaa88, < 0b6216f9b3d1c33c76f74511026e5de5385ee520 | ≥ 15de71d06a400f7fdc15bf377a2552b0ec437cf5, < 529c284cc2815c8350860e9a31722050fe7117cb | ≥ 15de71d06a400f7fdc15bf377a2552b0ec437cf5, < 3ed6c458530a547ed0c9ea0b02b19bab620be88b | ≥ 15de71d06a400f7fdc15bf377a2552b0ec437cf5, < 9fefc78f7f02d71810776fdeb119a05a946a27cc | 7689ab22de36f8db19095f6bdf11f28cfde92f5c | 62d591dde4defb1333d202410609c4ddeae060b3 | ≥ 5.10.241, < 5.10.248 | ≥ 5.15.190, < 5.15.198 | ≥ 6.1.149, < 6.1.160 | ≥ 6.6.103, < 6.6.120 | ≥ 6.12.44, < 6.12.63 | ≥ 5.4.297, < 5.5 | ≥ 6.16.4, < 6.17 | 6.17

3 vendors · 136 products

References

42 links
Show all 42 references