CVE-2026-53218
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-06-25
Modified: 2026-11-10
First seen: 2026-11-06
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_exthdr: fix register tracking for F_PRESENT flag nft_exthdr_init() passes user-controlled priv->len to nft_parse_register_store(), which marks that many bytes in the register bitmap as initialized. However, when NFT_EXTHDR_F_PRESENT is set, the eval paths write only 1 byte (nft_reg_store8) or 4 bytes (*dest = 0 on TCP/DCCP error path). When len > 4, registers beyond the first are never written, retaining uninitialized stack data from nft_regs. Bail out if userspace requests too much data when F_PRESENT is set.
Weakness Classification (1)
Affected Software (26)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 19748967d59c31d24d21d40b728570788310b237 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 46fc15a044e9938e7ea77786fb37edd2cd74f031 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < cd513e43b4b2bd1de39e2367bc4261c699a8652f |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 67b27434c43b68a97becda98c9f0c8cf6cba2134 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 78069a6d8bc86c9e036eb82c2af4a19cc1871a53 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 772cecf198da732faebb5dcfc46d66a505be8495 |
| Linux | Linux | 4.11 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 19748967d59c31d24d21d40b728570788310b237 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 46fc15a044e9938e7ea77786fb37edd2cd74f031 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < cd513e43b4b2bd1de39e2367bc4261c699a8652f |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 67b27434c43b68a97becda98c9f0c8cf6cba2134 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 78069a6d8bc86c9e036eb82c2af4a19cc1871a53 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265 |
| Linux | Linux | c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 < 772cecf198da732faebb5dcfc46d66a505be8495 |
| Linux | Linux | 4.11 |
| linux | linux_kernel | 4.11 – 5.10.259 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |