CVE-2026-43035
N/A
N/A
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak
When building netlink messages, tc_chain_fill_node() never initializes the tcm_info field of struct tcmsg. Since the allocation is not zeroed, kernel heap memory is leaked to userspace through this 4-byte field.
The fix simply zeroes tcm_info alongside the other fields that are already initialized.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < 903c3405cfcc7700260e456ab66a5867586c9e69 | affected |
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < 71a3eda7e850ae844cb8993065f4e410c11a46ce | affected |
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < 4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3 | affected |
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < e35f5195cd44ff4053fbc5d71ea97681728a0099 | affected |
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < d6db08484c6cb3d4ad696246f9d288eceba2a078 | affected |
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < 906997ea3766c24fbbf9cc4bf17c047315bbd138 | affected |
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < 1091b3c174441a52fdbb92e2fe00338f9371a91c | affected |
| Linux | Linux | 32a4f5ecd7381f30ae3bb36dea77a150ba68af2e < e6e3eb5ee89ac4c163d46429391c889a1bb5e404 | affected |
| Linux | Linux | 4.19 | affected |
| Linux | Linux | 0 < 4.19 | unaffected |
| Linux | Linux | 5.10.253 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.203 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.168 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.134 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.81 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.22 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.12 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/903c3405cfcc7700260e456ab66a5867586c9e69
- https://git.kernel.org/stable/c/71a3eda7e850ae844cb8993065f4e410c11a46ce
- https://git.kernel.org/stable/c/4ae5d23f51fb91d7d1140c6f1ba77ab0756054c3
- https://git.kernel.org/stable/c/e35f5195cd44ff4053fbc5d71ea97681728a0099
- https://git.kernel.org/stable/c/d6db08484c6cb3d4ad696246f9d288eceba2a078
- https://git.kernel.org/stable/c/906997ea3766c24fbbf9cc4bf17c047315bbd138
- https://git.kernel.org/stable/c/1091b3c174441a52fdbb92e2fe00338f9371a91c
- https://git.kernel.org/stable/c/e6e3eb5ee89ac4c163d46429391c889a1bb5e404
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