CVE-2026-98058

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Mark syscall helpers as sleepable bpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes, allocate with GFP_KERNEL, and wait for an RCU grace period. bpf_sys_close() reaches close_fd() and filp_close(), which can sleep as well. Both helpers are limited to BPF_PROG_TYPE_SYSCALL, whose main program is sleepable. That does not make every callback sleepable: a syscall program can register a bpf_timer callback, and the verifier checks that callback in a non-sleepable context while retaining the syscall helper set. Without .might_sleep on the prototypes, such a callback can invoke bpf_sys_bpf() from hrtimer softirq context and trigger a scheduling-while-atomic failure. bpf_sys_close() is exposed through the same missing context check. Set .might_sleep on both prototypes so the existing helper-context check rejects them from timer callbacks and other atomic regions. Calls from the sleepable main body remain valid.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Undergoing Analysis

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-25 11:17:34.767000

Last modified

2026-10-21 13:21:20.827000

View original CVE JSON

{
  "id": "CVE-2026-98058",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-25T11:17:34.767",
  "lastModified": "2026-10-21T13:21:20.827",
  "vulnStatus": "Undergoing Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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 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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "kernel/bpf/syscall.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
              "lessThan": "9496d857205e60241034b798d7745ff8830ba599",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
              "lessThan": "d8cfe9f71d302970ae393616960f2b3021d2b3b0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
              "lessThan": "65f636322ac402add6046c68e9ece77b9ffd71c9",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
              "lessThan": "3408e98f06ce06ea6a58ca6c39da9c23f0029c06",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "79a7f8bdb159d9914b58740f3d31d602a6e4aca8",
              "lessThan": "d05524794240b52fdc3b6c1220dd05505715824d",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "kernel/bpf/syscall.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.14",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.14",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.7",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/3408e98f06ce06ea6a58ca6c39da9c23f0029c06",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/65f636322ac402add6046c68e9ece77b9ffd71c9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9496d857205e60241034b798d7745ff8830ba599",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d05524794240b52fdc3b6c1220dd05505715824d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d8cfe9f71d302970ae393616960f2b3021d2b3b0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}