7.8

CVE-2026-74753: linux

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-74753DEBIAN-CVE-2026-74753
Published 26-08-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-74753 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% 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 5
MGASA-2026-0506RHSA-2026:72467RHSA-2026:72468RHSA-2026:72623RHSA-2026:72624

Timeline

  1. 26-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: perf: Reject exited events as group leaders perf_event_remove_on_exec() sets remove-on-exec events to the EXIT state and detaches their group relationships. The event's file descriptor can remain open, however, and perf_event_open() currently accepts that event as a group leader because its early validation rejects only REVOKED and DEAD events. A new sibling can consequently be linked to the detached leader. When the leader is closed, perf_group_detach() observes that its PERF_ATTACH_GROUP bit is already clear and skips the new sibling. The sibling then retains a group_leader pointer to the freed event. Reject group leaders in the EXIT state. Perform the check while holding the shared context mutex so that an exec in the target task cannot detach the leader between validation and group attachment. [peterz: make the earlier test fully consistent]

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 19-09-2026

19-09-202619-10-2026
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

Ubuntu117 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< 6.12.111-1 | < 7.1.10-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2, < ce12e1170c0c78dffb9b28af6d287492ae7dd99d | ≥ 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e, < e593031ff19a9484e8a00bc47edd447187721846 | ≥ a2d5d3ee7b6e3953114726b1521e62123ab5b043, < 7a03413f31c196ab3894f988cdce0bb47b4fec42 | ≥ 06ccef0434e98058ddae7bcebc901f93d22b7653, < 7ce010275c531475f9d6e7efb11b9e522c74ed2e | ≥ 037a3c43edfb597665dd34457cd22b14692f2ba3, < fa091f46c3833fb22384f10eade2b4e1e1d0b278 | ≥ 6.6.145, < 6.6.156 | ≥ 6.12.96, < 6.12.108 | ≥ 6.18.39, < 6.18.46 | ≥ 7.1.4, < 7.1.10

3 vendors · 120 products

References

9 links