5.5

CVE-2026-46046: ext4: fix missing brelse() in ext4_xattr_inode_dec_ref_all()

Modified
AliasesUBUNTU-CVE-2026-46046DEBIAN-CVE-2026-46046
Published 27-05-2026Last modified 15-10-2026

Vulnerability summary

CVE-2026-46046 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.13%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 45 · Related 45
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22809-1SUSE-SU-2026:22810-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix missing brelse() in ext4_xattr_inode_dec_ref_all() The commit c8e008b60492 ("ext4: ignore xattrs past end") introduced a refcount leak in when block_csum is false. ext4_xattr_inode_dec_ref_all() calls ext4_get_inode_loc() to get iloc.bh, but never releases it with brelse().

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu147 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded) | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3, < dd98a5603a212ea9c96c6982ccdbcc748fdb9a56 | ≥ f737418b6de31c962c7192777ee4018906975383, < 153ab2c52355fbebcae622db8e7b506492c73a29 | ≥ cf9291a3449b04688b81e32621e88de8f4314b54, < b706d00206a9e82362a9633efbd8b5775650169b | ≥ 362a90cecd36e8a5c415966d0b75b04a0270e4dd, < 1bc1107a3a403a6d440673ed6666f7b07ef868a8 | ≥ eb59cc31b6ea076021d14b04e7faab1636b87d0e, < 097227f1ffe1a85bc3c359f81c71e3d40e06e920 | ≥ c8e008b60492cf6fd31ef127aea6d02fd3d314cd, < 1e6b0a69bf2c9c819255c7566e4355536d81d9cf | ≥ c8e008b60492cf6fd31ef127aea6d02fd3d314cd, < f072906688933bf47fabbaf63560be03357c8298 | ≥ c8e008b60492cf6fd31ef127aea6d02fd3d314cd, < 77d059519382bd66283e6a4e83ee186e87e7708f | 6aff941cb0f7d0c897c3698ad2e30672709135e3 | 3bc6317033f365ce578eb6039445fb66162722fd | 836e625b03a666cf93ff5be328c8cb30336db872 | ≥ 5.10.237, < 5.10.258 | ≥ 5.15.181, < 5.15.209 | ≥ 6.1.135, < 6.1.175 | ≥ 6.6.88, < 6.6.140 | ≥ 6.12.24, < 6.12.86 | ≥ 5.4.293, < 5.5 | ≥ 6.13.12, < 6.14 | ≥ 6.14.3, < 6.15 | 6.15
  • linux_kernel≥ 5.4.293, < 5.5 | ≥ 5.10.237, < 5.10.258 | ≥ 5.15.181, < 5.15.209 | ≥ 6.1.135, < 6.1.175 | ≥ 6.6.88, < 6.6.140 | ≥ 6.12.24, < 6.12.86 | ≥ 6.13.12, < 6.14 | ≥ 6.14.3, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 150 products

References

49 links
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