CVE-2026-90226
CVE CVE-2026-90226EUVD EUVD-2026-81819Published 2026-09-17T16:07:35.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: avoid userspace overflow on invalid optlen nfc_llcp_getsockopt() casts optval to (u32 __user *) for put_user(), so the kernel always stores 4 bytes regardless of the caller-supplied optlen. The existing min_t(u32, len, sizeof(u32)) only clamps the length reported back to userspace; it does not constrain the store. A call with optlen < 4 therefore writes past the user buffer, violating the getsockopt(2) contract for all five supported optnames. Reject any call with optlen < sizeof(u32) up front. 'len' is int, so a plain size comparison would promote a negative optlen to size_t and slip past the check; an explicit 'len < 0' test is added first to catch negative values before the size compare.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <99985bfa8336fadcc69190ba2dcbd5386af3d661; patch: 6.1.188; patch: 6.18.52; patch: 5.15.221; 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <598dcd53c52f8eeb9dd5382198c03960d5d40fcd; 3.10; patch: 6.12.110; 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <7e40f2f5e7bc06c3ddef781180ce4f7994176547; patch: 7.3-rc1; 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <35573c6cb081af2f4a7caeea291302aca5484526; 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <b4c5abaea06292e1dddb70eac1b51589b32c77a3; patch: 6.6.157; patch: 7.2.6; 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <42859562b7cc4313a84a584f338118edb7087066; patch: 5.10.270; 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <bd6f1277b62bc1df348ca21739df2bc546fcd493; 26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 <8bf228fa02b1ed8ce622fb81fa8edc42be9aeb67; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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