9.8

CVE-2026-72463: linux

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-72463DEBIAN-CVE-2026-72463
Published 15-08-2026Last modified 03-10-2026
Open JSON

Vulnerability summary

CVE-2026-72463 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.44%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 13
SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:4120-1SUSE-SU-2026:4254-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 03-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix dev use-after-free in xfrm async resumption xfrm async resumption hold skb->dev refcnt until after transport_finish. However, xfrm_rcv_cb may modify skb->dev to tunnel dev without taking device reference, such as vti_rcv_cb. The subsequent async resumption will decrement the tunnel device's reference count, which lead to uaf of tunnel dev and refcnt leak of orig dev as below: unregister_netdevice: waiting for vti1 to become free. Usage count = -2 Stash the original skb->dev to fix refcnt imbalance. The new skb->dev set by xfrm_rcv_cb can race with device teardown. Extend rcu protection over xfrm_rcv_cb and transport_finish to prevent races.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

+0.06 pp

From 0.38% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.44%

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

Ubuntu125 products
  • linuxAll versions (No fix recorded) | < 7.0.0-34.34
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 7.0.0-1013.13
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.113-1 | < 7.1.5-1
Linux1 product
  • linux≥ 4236c30b437b80f673b9e08c8fae38b8d471ac9e, < fed4d3195a31125566876952ce66113ec1eb9008 | ≥ 0f451b43c88bf2b9c038b414be580efee42e031b, < 1acd93259b6be269e26be5d71c224bccd1f8352f | ≥ 1c428b03840094410c5fb6a5db30640486bbbfcb, < 63a30015199912bd5055bead8001b1ae68a67cdb | ≥ 1c428b03840094410c5fb6a5db30640486bbbfcb, < 8045c0df98d4f14c54e5cb875f1c9c0ce89fe4ff | 5002beda5cac69d522dc54da0d5d463ed9c963d2 | ≥ 6.12.94, < 6.12.112 | ≥ 6.18.23, < 6.18.54 | ≥ 6.19.13, < 6.20 | 7.0

3 vendors · 127 products

References

14 links
Show all 14 references