{"id":"CVE-2026-93803","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: libipw: fix key index receive bound checks\n\nlibipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in\nboth the software-decrypt key selection path a…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: libipw: fix key index receive bound checks\n\nlibipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in\nboth the software-decrypt key selection path a…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"Linux","product":"Linux","affected":["Linux >= b453872c35cfcbdbf5a794737817f7d4e7b1b579 < bb18262c19feb690ddde58c70e3ad04bc6fe566e","Linux >= b453872c35cfcbdbf5a794737817f7d4e7b1b579 < 09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82","Linux >= b453872c35cfcbdbf5a794737817f7d4e7b1b579 < 2836a870f612a8a6d9e390d00fa2cf6c90aa5808","Linux >= b453872c35cfcbdbf5a794737817f7d4e7b1b579 < 0b61c465ea62063593bc9ac186871b69e58ae991","Linux >= b453872c35cfcbdbf5a794737817f7d4e7b1b579 < 062840bdc9ee06169b3c371bf66711f1d7ec0bf4","Linux >= b453872c35cfcbdbf5a794737817f7d4e7b1b579 < c54b643e9a0936d038921c547736574fd7382cea","Linux >= b453872c35cfcbdbf5a794737817f7d4e7b1b579 < 74ed3669f26803b1761c1f55403062bea44c3466","Linux 2.6.14"],"published":"2026-09-24","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:50.060","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93803","references":[{"url":"https://git.kernel.org/stable/c/062840bdc9ee06169b3c371bf66711f1d7ec0bf4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0b61c465ea62063593bc9ac186871b69e58ae991","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2836a870f612a8a6d9e390d00fa2cf6c90aa5808","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/74ed3669f26803b1761c1f55403062bea44c3466","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bb18262c19feb690ddde58c70e3ad04bc6fe566e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c54b643e9a0936d038921c547736574fd7382cea","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93803.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93803"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540414"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93803"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93803"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93803.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00173,"epssPercentile":0.06623,"cvssSource":"vendor","ingestedAt":"2026-09-24T16:47:15.897Z","slug":"CVE-2026-93803","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: libipw: fix key index receive bound checks\n\nlibipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in\nboth the software-decrypt key selection path and the hardware-decrypted\nIV/ICV strip path. In both places the existing guard only checks\nskb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the\nbyte at hdrlen + 3.\n\nRequire hdrlen + 4 bytes before reading that item in both paths. This is\na local source-boundary check only; it does not change the key index\nsemantics.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93803.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212327,"id":"CVE-2026-93803","ts":1790668149956,"field":"cvss","old":null,"new":"5.5"},{"seq":212326,"id":"CVE-2026-93803","ts":1790668149956,"field":"severity","old":"none","new":"medium"}]}