{"id":"CVE-2026-98058","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark syscall helpers as sleepable\n\nbpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes,\nallocate with GFP_KERNEL, and wait for an RCU grace peri…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark syscall helpers as sleepable\n\nbpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes,\nallocate with GFP_KERNEL, and wait for an RCU grace peri…","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-1322"],"vendor":"Linux","product":"Linux","affected":["Linux >= 79a7f8bdb159d9914b58740f3d31d602a6e4aca8 < 3408e98f06ce06ea6a58ca6c39da9c23f0029c06","Linux >= 79a7f8bdb159d9914b58740f3d31d602a6e4aca8 < d05524794240b52fdc3b6c1220dd05505715824d","Linux 5.14"],"published":"2026-09-25","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:10.840","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98058","references":[{"url":"https://git.kernel.org/stable/c/3408e98f06ce06ea6a58ca6c39da9c23f0029c06","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/65f636322ac402add6046c68e9ece77b9ffd71c9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d05524794240b52fdc3b6c1220dd05505715824d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98058.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98058"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541201"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98058"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98058"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98058.mbox"},{"url":"https://git.kernel.org/stable/c/9496d857205e60241034b798d7745ff8830ba599"},{"url":"https://git.kernel.org/stable/c/d8cfe9f71d302970ae393616960f2b3021d2b3b0"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.002,"epssPercentile":0.09818,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.844Z","slug":"CVE-2026-98058","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark syscall helpers as sleepable\n\nbpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes,\nallocate with GFP_KERNEL, and wait for an RCU grace period.\nbpf_sys_close() reaches close_fd() and filp_close(), which can sleep as\nwell.\n\nBoth helpers are limited to BPF_PROG_TYPE_SYSCALL, whose main program is\nsleepable. That does not make every callback sleepable: a syscall program\ncan register a bpf_timer callback, and the verifier checks that callback\nin a non-sleepable context while retaining the syscall helper set.\n\nWithout .might_sleep on the prototypes, such a callback can invoke\nbpf_sys_bpf() from hrtimer softirq context and trigger a\nscheduling-while-atomic failure. bpf_sys_close() is exposed through the\nsame missing context check.\n\nSet .might_sleep on both prototypes so the existing helper-context check\nrejects them from timer callbacks and other atomic regions. Calls from the\nsleepable main body remain valid.\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 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98058.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212376,"id":"CVE-2026-98058","ts":1790668160177,"field":"cvss","old":null,"new":"5.5"},{"seq":212375,"id":"CVE-2026-98058","ts":1790668160177,"field":"severity","old":"none","new":"medium"}]}