CVE-2025-40175: idpf: cleanup remaining SKBs in PTP flows
Vulnerability summary
CVE-2025-40175 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 7.7% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 10 · Related 10Timeline
- 12-11-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: idpf: cleanup remaining SKBs in PTP flows When the driver requests Tx timestamp value, one of the first steps is to clone SKB using skb_get. It increases the reference counter for that SKB to prevent unexpected freeing by another component. However, there may be a case where the index is requested, SKB is assigned and never consumed by PTP flows - for example due to reset during running PTP apps. Add a check in release timestamping function to verify if the SKB assigned to Tx timestamp latch was freed, and release remaining SKBs.
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
Increase +0.01 pp
From 0.17% on 22-09-2026
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 causeNo weakness data has been published for this record.
Affected systems
Ubuntu93 products
- linux< 6.17.0-14.14
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.17.0-1007.7
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.17.6-1
Linux1 product
- linux≥ 4901e83a94ef0a8baf27916f31daf59b0a68547f, < 2c84e91ef831d4fedb0b94670b3cfd1cc5f966a5 | ≥ 4901e83a94ef0a8baf27916f31daf59b0a68547f, < a3f8c0a273120fd2638f03403e786c3de2382e72 | 6.16
3 vendors · 95 products
