{"id":"CVE-2020-11494","title":"An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2","summary":"An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if th…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-908","CWE-909","CWE-200"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 3.16, <= 5.6.2","leap = 15.1","debian_linux = 8.0","debian_linux = 9.0","ubuntu_linux = 14.04","ubuntu_linux = 16.04","ubuntu_linux = 18.04","ubuntu_linux = 19.10"],"published":"2020-04-02","updated":"2026-10-08","sourceUpdated":"2026-10-08T21:17:20.893","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-11494","references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html","label":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/159565/Kernel-Live-Patch-Security-Notice-LSN-0072-1.html","label":"cve@mitre.org"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=08fadc32ce6239dc75fd5e869590e29bc62bbc28","label":"cve@mitre.org"},{"url":"https://github.com/torvalds/linux/commit/b9258a2cece4ec1f020715fe3554bc2e360f6264","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20200430-0004/","label":"cve@mitre.org"},{"url":"https://usn.ubuntu.com/4363-1/","label":"cve@mitre.org"},{"url":"https://usn.ubuntu.com/4364-1/","label":"cve@mitre.org"},{"url":"https://usn.ubuntu.com/4368-1/","label":"cve@mitre.org"},{"url":"https://usn.ubuntu.com/4369-1/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2020/dsa-4698","label":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/159565/Kernel-Live-Patch-Security-Notice-LSN-0072-1.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=08fadc32ce6239dc75fd5e869590e29bc62bbc28","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/torvalds/linux/commit/b9258a2cece4ec1f020715fe3554bc2e360f6264","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20200430-0004/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4363-1/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4364-1/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4368-1/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/4369-1/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2020/dsa-4698","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-11494.json"},{"url":"https://access.redhat.com/security/cve/CVE-2020-11494"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1826030"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-11494"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11494"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00722,"epssPercentile":0.52655,"ingestedAt":"2026-10-08T22:11:53.712Z","slug":"CVE-2020-11494","body":"## Overview\n\nAn issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4.\n\n## Affected\n\n- `linux_kernel >= 3.16, <= 5.6.2`\n- `leap = 15.1`\n- `debian_linux = 8.0`\n- `debian_linux = 9.0`\n- `ubuntu_linux = 14.04`\n- `ubuntu_linux = 16.04`\n- `ubuntu_linux = 18.04`\n- `ubuntu_linux = 19.10`\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** · Low · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · no fix planned: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · updated 2026-10-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-11494.json)","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}