5.5

CVE-2024-35997: HID: i2c-hid: remove I2C_HID_READ_PENDING flag to prevent lock-up

Modified
AliasesUBUNTU-CVE-2024-35997DEBIAN-CVE-2024-35997
Published 20-05-2024Last modified 15-10-2026

Vulnerability summary

CVE-2024-35997 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 34
DLA-3840-1DLA-3842-1MGASA-2024-0263MGASA-2024-0266SUSE-SU-2024:2135-1SUSE-SU-2024:2203-1

Timeline

  1. 20-05-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: HID: i2c-hid: remove I2C_HID_READ_PENDING flag to prevent lock-up The flag I2C_HID_READ_PENDING is used to serialize I2C operations. However, this is not necessary, because I2C core already has its own locking for that. More importantly, this flag can cause a lock-up: if the flag is set in i2c_hid_xfer() and an interrupt happens, the interrupt handler (i2c_hid_irq) will check this flag and return immediately without doing anything, then the interrupt handler will be invoked again in an infinite loop. Since interrupt handler is an RT task, it takes over the CPU and the flag-clearing task never gets scheduled, thus we have a lock-up. Delete this unnecessary flag.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu128 products
  • linuxAll versions (No fix recorded) | < 4.4.0-257.291 | < 4.15.0-227.239 | < 5.4.0-189.209 | < 5.15.0-116.126 | < 6.8.0-39.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1134.140 | < 4.4.0-1172.187 | < 4.15.0-1170.183 | < 5.4.0-1128.138 | < 5.15.0-1065.71 | < 6.8.0-1012.13
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < 21bfca822cfc1e71796124e93b46e0d9fa584401 | ≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < c448a9fd50f77e8fb9156ff64848aa4295eb3003 | ≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < 5095b93021b899f54c9355bebf36d78854c33a22 | ≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < b65fb50e04a95eec34a9d1bc138454a98a5578d8 | ≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < 0561b65fbd53d3e788c5b0222d9112ca016fd6a1 | ≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < 29e94f295bad5be59cf4271a93e22cdcf5536722 | ≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < 418c5575d56410c6e186ab727bf32ae32447d497 | ≥ 4a200c3b9a40242652b5734630bdd0bcf3aca75f, < 9c0f59e47a90c54d0153f8ddc0f80d7a36207d0e | 3.8
  • linux_kernel≥ 3.8, < 4.19.313 | ≥ 4.20, < 5.4.275 | ≥ 5.5, < 5.10.216 | ≥ 5.11, < 5.15.158 | ≥ 5.16, < 6.1.90 | ≥ 6.2, < 6.6.30 | ≥ 6.7, < 6.8.9
Debian1 product
  • linux< 6.1.90-1 | < 6.8.9-1

3 vendors · 131 products

References

37 links
Show all 37 references