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CVE-2026-46164: linux Double Free

CVSS: 7.0v3.1HighModified
AliasesUBUNTU-CVE-2026-46164DEBIAN-CVE-2026-46164
Published 28-05-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-46164 is a high (CVSS 7.0) Double Free vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.3% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 26 · Related 26
OPENSUSE-SU-2026:10954-1USN-8566-1USN-8567-1USN-8568-1USN-8569-1USN-8574-1

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double free in create_space_info_sub_group() error path When kobject_init_and_add() fails, the call chain is: create_space_info_sub_group() -> btrfs_sysfs_add_space_info_type() -> kobject_init_and_add() -> failure -> kobject_put(&sub_group->kobj) -> space_info_release() -> kfree(sub_group) Then control returns to create_space_info_sub_group(), where: btrfs_sysfs_add_space_info_type() returns error -> kfree(sub_group) Thus, sub_group is freed twice. Keep parent->sub_group[index] = NULL for the failure path, but after btrfs_sysfs_add_space_info_type() has called kobject_put(), let the kobject release callback handle the cleanup.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.03 pp

From 0.14% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.17%

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

Affected systems

Ubuntu136 products
  • linux< 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1061.64 | All versions (No fix recorded) | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 64c7ddda83acfbaa0efb381a1928ce908c584607, < c2d59527cba6d59f0d77a75c1101ab4e69758bea | ≥ 0bd151ce4200ca847990e05cca29a76456982ca5, < d2a675f2e238ec96c8e91e2718c1f910c9c8fb21 | ≥ 190d5a7c4fe42b8c9aa46e3336389e7cb10395bb, < 14b22be1dd844383eb03af9b1ee3b6b25d32aeaf | ≥ f92ee31e031c7819126d2febdda0c3e91f5d2eb9, < dfd05a16b5c9d1d98b47905f37f2fccda52173d1 | ≥ f92ee31e031c7819126d2febdda0c3e91f5d2eb9, < 259af6857a1b4f1e9ef8b780353f9d11c26a22bd | ≥ f92ee31e031c7819126d2febdda0c3e91f5d2eb9, < a7449edf96143f192606ec8647e3167e1ecbd728 | ≥ 6.1.162, < 6.1.176 | ≥ 6.6.122, < 6.6.141 | ≥ 6.12.67, < 6.12.90 | 6.16
  • linux_kernel≥ 6.1.162, < 6.2 | ≥ 6.6.122, < 6.6.141 | ≥ 6.12.67, < 6.12.90 | ≥ 6.16, < 6.18.32 | ≥ 6.19, < 7.0.7
Debian1 product
  • linux< 6.1.176-1 | < 6.12.90-1 | < 7.0.7-1

3 vendors · 139 products

References

36 links
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