CVE-2025-40263: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40263DEBIAN-CVE-2025-40263
Published 04-12-2025Last modified 02-06-2026
Open JSON

Vulnerability summary

CVE-2025-40263 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.4% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.19%
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 43 · Related 39
DLA-4404-1DLA-4436-1MGASA-2026-0017MGASA-2026-0018OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1

Timeline

  1. 04-12-2025
    PublishedVulnerability first disclosed.
  2. 02-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Input: cros_ec_keyb - fix an invalid memory access If cros_ec_keyb_register_matrix() isn't called (due to `buttons_switches_only`) in cros_ec_keyb_probe(), `ckdev->idev` remains NULL. An invalid memory access is observed in cros_ec_keyb_process() when receiving an EC_MKBP_EVENT_KEY_MATRIX event in cros_ec_keyb_work() in such case. Unable to handle kernel read from unreadable memory at virtual address 0000000000000028 ... x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: input_event cros_ec_keyb_work blocking_notifier_call_chain ec_irq_thread It's still unknown about why the kernel receives such malformed event, in any cases, the kernel shouldn't access `ckdev->idev` and friends if the driver doesn't intend to initialize them.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

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

No weakness data has been published for this record.

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-106.106 | < 6.17.0-19.19
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1050.53 | < 6.17.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.159-1 | < 6.12.63-1 | < 6.17.10-1
Linux1 product
  • linux≥ ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0, < d74864291cb8bd784d44d1d02e87109cf88666bb | ≥ ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0, < 9cf59f4724a9ee06ebb06c76b8678ac322e850b7 | ≥ ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0, < 6d81068685154535af06163eb585d6d9663ec7ec | ≥ ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0, < 2d251c15c27e2dd16d6318425d2f7260cbd47d39 | ≥ ca1eadbfcd36bec73f2a2111c28e8c7e9e8ae6c0, < e08969c4d65ac31297fcb4d31d4808c789152f68 | 5.19

3 vendors · 159 products

References

37 links
Show all 37 references