{"id":"CVE-2026-93159","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: atmel-sha204a - fix heap info leak on I2C transfer failure\n\nThe nonblocking RNG path allocates a work_data structure to track the\nstate of an in-flight asynchro…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: atmel-sha204a - fix heap info leak on I2C transfer failure\n\nThe nonblocking RNG path allocates a work_data structure to track the\nstate of an in-flight asynchro…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < a430b5b6d2ddd2b266330f8507a655be1148347d","Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < 4e76d85e505b7451925efbcd67c015e8c2440c68","Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < bcac9052e19490231ff6e0678a06bd2fcf8db3af","Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < 28cc179252347718f97045dd5ea74165609dbd7d","Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < 0d6db386133d9230befb77967bbf130443964860","Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < f4d347fb1309b69ea6f817a17e6b2893c8d754b7","Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < 94abda77b57a35b82bba0365bad072d94d67ffe9","Linux >= da001fb651b00e1deeaf24767dd691ae8152a4f5 < 72bbf11ba14bd7d5fbf31a1ec42fff608b657f74","Linux 5.3"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:18:11.277","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93159","references":[{"url":"https://git.kernel.org/stable/c/0d6db386133d9230befb77967bbf130443964860","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/28cc179252347718f97045dd5ea74165609dbd7d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4e76d85e505b7451925efbcd67c015e8c2440c68","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/72bbf11ba14bd7d5fbf31a1ec42fff608b657f74","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/94abda77b57a35b82bba0365bad072d94d67ffe9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a430b5b6d2ddd2b266330f8507a655be1148347d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bcac9052e19490231ff6e0678a06bd2fcf8db3af","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f4d347fb1309b69ea6f817a17e6b2893c8d754b7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93159.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93159"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536807"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93159"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93159"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93159.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.734Z","epss":0.0021,"epssPercentile":0.11549,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-459"],"slug":"CVE-2026-93159","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: atmel-sha204a - fix heap info leak on I2C transfer failure\n\nThe nonblocking RNG path allocates a work_data structure to track the\nstate of an in-flight asynchronous I2C request. This pointer is stored\nin rng->priv and later consumed by the read path once the transaction\ncompletes.\n\nIf the underlying I2C transfer fails, the completion callback is invoked\nwith a non-zero status. In this case, the allocated work_data is not\nusable for producing RNG output and must not remain associated with the\nhwrng state.\n\nPreviously, the failure path only logged a warning but left the pointer\nstate uncleared, which can result in subsequent read attempts observing\nstale state and interpreting it as valid completion data.\n\nFix this by freeing the pending work_data. The I2C transaction reports\nan error. This ensures that failed requests do not leave residual state\nbehind that could be interpreted as valid RNG data on later reads.\nClearing rng->priv is done at the subsequent call to nonblocking read.\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 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93159.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208920,"id":"CVE-2026-93159","ts":1790062285413,"field":"cvss","old":null,"new":"5.5"},{"seq":208919,"id":"CVE-2026-93159","ts":1790062285413,"field":"severity","old":"none","new":"medium"}]}