5.5

CVE-2026-53023: fs/ntfs3: terminate the cached volume label after UTF-8 conversion

Analyzed
AliasesUBUNTU-CVE-2026-53023DEBIAN-CVE-2026-53023
Published 24-06-2026Last modified 24-06-2026

Vulnerability summary

CVE-2026-53023 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.4% 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
0.16%
0%100%
Low · 0.00 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 37 · Related 37
USN-8566-1USN-8567-1USN-8568-1USN-8569-1USN-8574-1USN-8574-2

Timeline

  1. 24-06-2026
    PublishedVulnerability first disclosed.

Description

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: terminate the cached volume label after UTF-8 conversion ntfs_fill_super() loads the on-disk volume label with utf16s_to_utf8s() and stores the result in sbi->volume.label. The converted label is later exposed through ntfs3_label_show() using %s, but utf16s_to_utf8s() only returns the number of bytes written and does not add a trailing NUL. If the converted label fills the entire fixed buffer, ntfs3_label_show() can read past the end of sbi->volume.label while looking for a terminator. Terminate the cached label explicitly after a successful conversion and clamp the exact-full case to the last byte of the buffer.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% 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.

Ubuntu154 products
  • linux< 5.15.0-186.196 | < 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< 5.15.0-1112.119 | < 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≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 32b0686369e0afbb3549a0d93e2d8517da84cd30 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < bc7a0c34c4ca259cfddf3bc18fc5b3c6411d26ed | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 0b11fcbe80a59acdf58337d80ebb5f72201d73d6 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 54d564b762389679e2f8fb9eeb20af7e82371e1c | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 6136bbb054f7ab9f51ae99915541633b18bcef90 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 5cd0707b81cb4589f00aec5c4c1288bd0980d2a4 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < a6cd43fe9b083fa23fe1595666d5738856cb261a | 5.15
  • linux_kernel≥ 5.15, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.141 | ≥ 6.7, < 6.12.91 | ≥ 6.13, < 6.18.33 | ≥ 6.19, < 7.0.10
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.10-1

3 vendors · 157 products

References

49 links
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