7.8

CVE-2026-64333: linux Out-of-bounds Write

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-64333DEBIAN-CVE-2026-64333
Published 25-07-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-64333 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.8% 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
0.17%
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 33 · Related 33
OPENSUSE-SU-2026:11476-1OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1

Timeline

  1. 25-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: digi_acceleport: fix write buffer corruption The digi_write_inb_command() is supposed to wait for the write urb to become available or return an error, but instead it updates the transfer buffer and tries to resubmit the urb on timeout. To make things worse, for commands like break control where no timeout is used, the driver would corrupt the urb immediately due to a broken jiffies comparison (on 32-bit machines this takes five minutes of uptime to trigger due to INITIAL_JIFFIES). Fix this by adding the missing return on timeout and waiting indefinitely when no timeout has been specified as intended. This issue was (sort of) flagged by Sashiko when reviewing an unrelated change to the driver.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% 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

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)
Debian2 products
  • linux< 6.1.180-1 | < 6.12.96-1 | < 7.1.4-1
  • linux-6.12< 6.12.100-1~deb12u1
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5d9dc88bdf8897788b0eed57113e9eca7fd42ea9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2f296974acc279f05f284441bfe3064074958d11 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e60e4873e9178da9f4f2674e4c2ff085d5a84f79 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 699dfb6917503b3cda4d5da6941cf79c3c1b4c8b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a274b3794fe1852c3d9fe6d900b94053c0b03410 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1243f120790042c2ac92e84e797dacc75fff4366 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a3a13fdc53103b07335918e2cdeb465038a71725 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 24ca1fea8f2753bf33e1d458ec1ae5d9b7796a65 | 2.6.12
  • linux_kernel≥ 2.6.12.1, < 5.10.261 | ≥ 5.11, < 5.15.212 | ≥ 5.16, < 6.1.178 | ≥ 6.2, < 6.6.145 | ≥ 6.7, < 6.12.96 | ≥ 6.13, < 6.18.39 | ≥ 6.19, < 7.1.4 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5 | 7.2:rc1 | 7.2:rc2

3 vendors · 173 products

References

32 links
Show all 32 references