CVE-2024-40994: ptp: fix integer overflow in max_vclocks_store
Vulnerability summary
CVE-2024-40994 is a high (CVSS 7.8) Integer Overflow or Wraparound vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.1% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 25 · Related 23Timeline
- 12-07-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: ptp: fix integer overflow in max_vclocks_store On 32bit systems, the "4 * max" multiply can overflow. Use kcalloc() to do the allocation to prevent this.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.28%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.28% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu116 products
- linux< 5.15.0-121.131 | < 6.8.0-44.44
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1069.75 | < 6.8.0-1015.16
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 44c494c8e30e35713c7d11ca3c5ab332cbfabacf, < 4b03da87d0b7074c93d9662c6e1a8939f9b8b86e | ≥ 44c494c8e30e35713c7d11ca3c5ab332cbfabacf, < d50d62d5e6ee6aa03c00bddb91745d0b632d3b0f | ≥ 44c494c8e30e35713c7d11ca3c5ab332cbfabacf, < 666e934d749e50a37f3796caaf843a605f115b6f | ≥ 44c494c8e30e35713c7d11ca3c5ab332cbfabacf, < e1fccfb4638ee6188377867f6015d0ce35764a8e | ≥ 44c494c8e30e35713c7d11ca3c5ab332cbfabacf, < 81d23d2a24012e448f651e007fac2cfd20a45ce0 | 5.14
- linux_kernel≥ 5.14, < 5.15.162 | ≥ 5.16, < 6.1.96 | ≥ 6.2, < 6.6.36 | ≥ 6.7, < 6.9.7 | 6.10:rc1 | 6.10:rc2 | 6.10:rc3 | 6.10:rc4
Debian1 product
- linux< 6.1.99-1 | < 6.9.7-1
3 vendors · 119 products
