7.8

CVE-2026-74661: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-74661DEBIAN-CVE-2026-74661
Published 22-08-2026Last modified 25-08-2026
Open JSON

Vulnerability summary

CVE-2026-74661 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
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 2 · Related 1
MGASA-2026-0506USN-8886-1

Timeline

  1. 22-08-2026
    PublishedVulnerability first disclosed.
  2. 25-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mac802154: fix netdev use-after-free in beacon worker mac802154_beacon_worker() reads local->beacon_req under RCU and derives the sub-interface from the request, but then drops the RCU read lock and continues to use both sdata and the embedded wpan_dev. mac802154_stop_beacons_locked() cancels only pending beacon work, clears local->beacon_req and frees the request. A beacon worker that is already running can therefore continue after interface teardown and dereference the freed netdev private area. The scan worker already pins the netdev before leaving RCU. Apply the same lifetime rule to the beacon worker: take a netdev reference while the request is still protected by RCU, and release it on all paths that continue after the reference is acquired.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.13%

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

Ubuntu142 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.12.105-1 | < 7.1.9-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 3accf4762734a69ebd03cba989249c78ac7dfc7e, < fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517 | ≥ 3accf4762734a69ebd03cba989249c78ac7dfc7e, < e5fb0e03bc7f45508c182a427357bf6b389a9033 | ≥ 3accf4762734a69ebd03cba989249c78ac7dfc7e, < e6cd416a899edc912b428c4ba399bd73f516cb31 | ≥ 3accf4762734a69ebd03cba989249c78ac7dfc7e, < 9d067e581597c462c51fee8a30b51bc48a68c4e1 | ≥ 3accf4762734a69ebd03cba989249c78ac7dfc7e, < 5f26a690e8efa54315e4922368daf54e0b8f5515 | 6.3

3 vendors · 145 products

References

10 links