{"id":"CVE-2024-26993","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: sysfs: Fix reference leak in sysfs_break_active_protection()\n\nThe sysfs_break_active_protection() routine has an obvious reference\nleak in its error path","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: sysfs: Fix reference leak in sysfs_break_active_protection()\n\nThe sysfs_break_active_protection() routine has an obvious reference\nleak in its error path.  If the c…","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","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 3.16.62, < 3.17","linux_kernel >= 3.18.121, < 3.19","linux_kernel >= 4.4.154, < 4.5","linux_kernel >= 4.9.125, < 4.10","linux_kernel >= 4.14.68, < 4.15","linux_kernel >= 4.18.6, < 4.19","linux_kernel >= 4.19, < 5.15.157","linux_kernel >= 5.16, < 6.1.88","linux_kernel >= 6.2, < 6.6.29","linux_kernel >= 6.7, < 6.8.8","linux_kernel = 6.9"],"patched":["linux_kernel 6.8.8"],"published":"2024-05-01","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:17:35.637","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-26993","references":[{"url":"https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-613116.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00267,"epssPercentile":0.18757,"ingestedAt":"2026-10-15T03:30:12.667Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-05-01T13:37:12.333218Z"},"slug":"CVE-2024-26993","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfs: sysfs: Fix reference leak in sysfs_break_active_protection()\n\nThe sysfs_break_active_protection() routine has an obvious reference\nleak in its error path.  If the call to kernfs_find_and_get() fails then\nkn will be NULL, so the companion sysfs_unbreak_active_protection()\nroutine won't get called (and would only cause an access violation by\ntrying to dereference kn->parent if it was called).  As a result, the\nreference to kobj acquired at the start of the function will never be\nreleased.\n\nFix the leak by adding an explicit kobject_put() call when kn is NULL.\n\n## Affected\n\n- `linux_kernel >= 3.16.62, < 3.17`\n- `linux_kernel >= 3.18.121, < 3.19`\n- `linux_kernel >= 4.4.154, < 4.5`\n- `linux_kernel >= 4.9.125, < 4.10`\n- `linux_kernel >= 4.14.68, < 4.15`\n- `linux_kernel >= 4.18.6, < 4.19`\n- `linux_kernel >= 4.19, < 5.15.157`\n- `linux_kernel >= 5.16, < 6.1.88`\n- `linux_kernel >= 6.2, < 6.6.29`\n- `linux_kernel >= 6.7, < 6.8.8`\n- `linux_kernel = 6.9`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.8.8`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}