7.8

CVE-2026-53388: linux Use After Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-53388DEBIAN-CVE-2026-53388
Published 19-07-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-53388 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% 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 54 · Related 53
MGASA-2026-0312OPENSUSE-SU-2026:11339-1OPENSUSE-SU-2026:21555-1OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before replacing page cache folio fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path. This means fuse_chan_abort() can end the request and free the fuse_io_args (eg fuse_readpages_end()) while the subsequent copy chain logic after fuse_try_move_folio() accesses the fuse_io_args, leading to use-after-free issues. Fix this by calling lock_request() before replace_page_cache_folio(). This ensures the request is locked on the success path which will prevent the fuse_io_args from being freed while the later copying logic runs, and also ensures that the ap->folios[i]->mapping is never null since ap->folios[i] will always point to the newfolio after replace_page_cache_folio().

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

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

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < 7c18691e0cfda29672f79bafde8abdb7710674f6 | ≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < 5927b43a4f8d89e86930f524bf63e9c7e66f61b4 | ≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < 030fe3e9d8abdee303dd7e9e42f45082d382a407 | ≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < 46473ddccdc5065033e397d6e62c280dbcd3d9c2 | ≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < af2892249d982a1c036ca456cc135374e68b6677 | ≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < 0223f452532d9cd8a5e87c45de828fd93c99bd25 | ≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < e28db6ac4792d065ab32565fd9f0a2361c3d4666 | ≥ ce534fb052928ce556639d7ecf01cbf4e01321e1, < a078484921052d0badd827fcc2770b5cfc1d4120 | 2.6.35
  • linux_kernel≥ 2.6.35, < 5.15.211 | ≥ 5.16, < 6.1.177 | ≥ 6.2, < 6.6.144 | ≥ 6.7, < 6.12.95 | ≥ 6.13, < 6.18.37 | ≥ 6.19, < 7.0.14 | ≥ 7.1, < 7.1.2
Debian1 product
  • linux< 6.1.177-1 | < 6.12.95-1 | < 7.0.14-1

3 vendors · 172 products

References

32 links
Show all 32 references