VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-92517: Linux kernel · bpf, riscv: Fix extable handling for arena load_acquire

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 26d9496c826586338d1b8c27edfec4a19a89f462 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 26d9496c826586338d1b8c27edfec4a19a89f462, 08fe2eaa609180c1baeb76c2629a9c82263b0427, 5eb8921371c6fd117d4a328b6053dfda38707df8

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to 26d9496c826586338d1b8c27edfec4a19a89f462, 08fe2eaa609180c1baeb76c2629a9c82263b0427 or 5eb8921371c6fd117d4a328b6053dfda38707df8.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ fb7cefabae8117c203155ef169a386bec43bbba9, < 26d9496c826586338d1b8c27edfec4a19a89f462	Fixed in 26d9496c826586338d1b8c27edfec4a19a89f462
LinuxLinux	Affected ≥ fb7cefabae8117c203155ef169a386bec43bbba9, < 08fe2eaa609180c1baeb76c2629a9c82263b0427	Fixed in 08fe2eaa609180c1baeb76c2629a9c82263b0427
LinuxLinux	Affected ≥ fb7cefabae8117c203155ef169a386bec43bbba9, < 5eb8921371c6fd117d4a328b6053dfda38707df8	Fixed in 5eb8921371c6fd117d4a328b6053dfda38707df8
LinuxLinux	Affected =6.18	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: bpf, riscv: Fix extable handling for arena load_acquire emit_atomic_ld_st() returns 1 to have build_body() skip the zext after a sub-word load_acquire. The caller does "ret = ret ?: add_exception_handler(...)", which skips add_exception_handler() on any non-zero ret, so the extable entry is missing and a faulting PROBE_ATOMIC load_acquire oopses. REG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still thinks the load overwrote it, so a program can leak it through a map. Check ret >= 0 before calling add_exception_handler(), and pass rd for LOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret unchanged for the zext skip.

References

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