In the Linux kernel, the following vulnerability has been resolved:
net_sched: keep alloc_hash updated after hash allocation
In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex")
I moved cp->hash calculation before the first
tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched.
This difference could lead to another out of bound access.
cp->alloc_hash should always be the size allocated, we should
update it after this tcindex_alloc_perfect_hash().
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorLocal
ComplexityLow
RequirementsPresent
PrivilegesLow
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | AV: P→L, AC: H→L, PR: H→L, UI: A→N, VC: N→H, VA: N→H | 0.0 → 2.0 |
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 0.0 → 0.0 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| Linux | Linux | ≥ 2c66ff8d08f81bcf8e8cb22e31e39c05, < bd3ee8fb6371b45c71c9345cc359b94d |
| Linux | Linux | ≥ 599be01ee567b61f4471ee8078870847, < 0d1c3530e1bd38382edef72591b78e87 |
| Linux | Linux | ≥ 4.4.214, < 4.4.218 |
| Linux | Linux | ≥ 4.9.214, < 4.9.218 |
| Linux | Linux | ≥ 4.14.171, < 4.14.175 |
| Linux | Linux | ≥ 4.19.103, < 4.19.114 |
| Linux | Linux | ≥ 73c29d2f6f8ae731b1e09051b69ed3ba, < d6cdc5bb19b595486fb2e6661e5138d7 |
| Linux | Linux | ≥ 5.4.19, < 5.4.29 |
| Linux | Linux | < c4453d2833671e3a9f6bd52f0f581056 |
| Linux | Linux | ≥ 5.5.3, < 5.5.14 |
| Linux | Linux | ≥ 6cb448ee493c8a514c9afa0c346f3f5b, < 9f8b6c44be178c2498a00b270872a6e3 |
| Linux | Linux | ≥ 478c4b2ffd44e5186c7e22ae7c38a86a, < 557d015ffb27b672e24e6ad141fd8877 |
| Linux | Linux | < d23faf32e577922b6da20bf3740625c1 |
| linux | linux_kernel | ≥ 4.9.214, < 4.9.218 |
| linux | linux_kernel | ≥ 4.14.171, < 4.14.175 |
| linux | linux_kernel | ≥ 4.19.103, < 4.19.114 |
| linux | linux_kernel | ≥ 5.4.19, < 5.4.29 |
| linux | linux_kernel | ≥ 5.5.3, < 5.5.14 |
| linux | linux_kernel | ≥ 4.4.214, < 4.4.218 |
| linux | linux_kernel | 5.6 |
Published: 2025-05-07
