9.8

CVE-2023-53360: linux Double Free

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2023-53360DEBIAN-CVE-2023-53360
Published 17-09-2025Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2023-53360 is a critical (CVSS 9.8) Double Free vulnerability in linux. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.41%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 10
SUSE-SU-2025:03600-1SUSE-SU-2025:03634-1SUSE-SU-2025:20851-1SUSE-SU-2025:20861-1SUSE-SU-2025:20870-1SUSE-SU-2025:20898-1

Timeline

  1. 17-09-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: Rework scratch handling for READ_PLUS (again) I found that the read code might send multiple requests using the same nfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is how we ended up occasionally double-freeing the scratch buffer, but also means we set a NULL pointer but non-zero length to the xdr scratch buffer. This results in an oops the first time decoding needs to copy something to scratch, which frequently happens when decoding READ_PLUS hole segments. I fix this by moving scratch handling into the pageio read code. I provide a function to allocate scratch space for decoding read replies, and free the scratch buffer when the nfs_pgio_header is freed.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

+0.01 pp

From 0.40% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.41%

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

Ubuntu84 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 886959f425b6a936a30b82a297ae3aecb3b8230f, < adac9f0ddd2b291c7ce41f549fdb27a13616cff5 | ≥ fbd2a05f29a95d5b42b294bf47e55a711424965b, < a2f4cb206bd94b3f4a7bb05fcdce9525283b5681 | ≥ fbd2a05f29a95d5b42b294bf47e55a711424965b, < ae5d5672f1db711e91db6f52df5cb16ecd8f5692 | ≥ fbd2a05f29a95d5b42b294bf47e55a711424965b, < 303a78052091c81e9003915c521fdca1c7e117af | 6.4
  • linux_kernel≥ 6.4, < 6.4.16 | ≥ 6.5, < 6.5.3
Debian1 product
  • linux< 6.1.55-1 | < 6.5.3-1

3 vendors · 87 products

References

8 links