5.5

CVE-2026-31624: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31624DEBIAN-CVE-2026-31624CGA-55mc-6m24-g5cq
Published 24-04-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-31624 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.17%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 46 · Related 47
OPENSUSE-SU-2026:10703-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 24-04-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: HID: core: clamp report_size in s32ton() to avoid undefined shift s32ton() shifts by n-1 where n is the field's report_size, a value that comes directly from a HID device. The HID parser bounds report_size only to <= 256, so a broken HID device can supply a report descriptor with a wide field that triggers shift exponents up to 256 on a 32-bit type when an output report is built via hid_output_field() or hid_set_field(). Commit ec61b41918587 ("HID: core: fix shift-out-of-bounds in hid_report_raw_event") added the same n > 32 clamp to the function snto32(), but s32ton() was never given the same fix as I guess syzbot hadn't figured out how to fuzz a device the same way. Fix this up by just clamping the max value of n, just like snto32() does.

CVSS metrics

3 scores · 3 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

+0.05 pp

From 0.13% 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

No weakness data has been published for this record.

Affected systems

Ubuntu158 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard10 products
  • linux-aws-6.12< 6.12.85-r0
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.31-r0
  • linux-gcp-6.12< 6.12.85-r0
  • linux-gcp-6.18< 6.18.31-r0
Linux2 products
  • linux≥ dde5845a529ff753364a6d1aea61180946270bfa, < 76ad02854a30c394e0c076e6e6bed0a388573a94 | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < eb415ddaf25e09ddb8fe5736a70c9de2e6462534 | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < 0ab048dbdb1daacf17d52e9252297eb6e1298e49 | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < 932ae5309e53561197aa7d1606c7cf63af10e24f | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < 58386f00af710922cafb0fb69211497beddfaa95 | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < 8a8333237f1f5caab8d4c3d2c2e7578c4263a97f | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < ea363a34086ddb4231adc581a7f36c39ec154bfc | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < 97014719bb8fccb1ffcbbc299e84b1f11b114195 | ≥ dde5845a529ff753364a6d1aea61180946270bfa, < 69c02ffde6ed4d535fa4e693a9e572729cad3d0d | 2.6.20
  • linux_kernel≥ 2.6.20.1, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | ≥ 7.0, < 7.0.1 | 2.6.20
Debian1 product
  • linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1

4 vendors · 171 products

References

47 links
Show all 47 references