# CVE-2026-99267: io_uring/napi: make stale entries time out after 60s

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

In the Linux kernel, the following vulnerability has been resolved:

io_uring/napi: make stale entries time out after 60s

With dynamic tracking a NAPI id that hasn't been seen for a minute is
meant to be dropped from the list the ring busy polls. The timeout is
added to jiffies, but it is defined as 60 * SEC_CONVERSION, and
SEC_CONVERSION isn't the number of jiffies in a second. It is the
internal factor of __timespec64_to_jiffies(), HZ scaled up by
SEC_JIFFIE_SC bits. For HZ=1000 that is 1000 << 22, which puts the
timeout at about eight years. On 32-bit the multiplication overflows.

So entries are never removed, and every id that a socket of the ring
ever had keeps being polled on each wait.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5; < 3fe820cf35f83534eab72ea73f1a83cfd3cd8079 (affected, git); ≥ 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5; < 18c373f446068972788158c8c7de6e849b04ed98 (affected, git); ≥ 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5; < 981621d6eadcd232d4ea748aaeb046337f10d3c1 (affected, git). Source: CNA: Linux
- Linux / Linux: 6.9 (affected); ≥ 0; < 6.9 (unaffected, semver); ≥ 6.12.115; ≤ 6.12.* (unaffected, semver); ≥ 6.18.60; ≤ 6.18.* (unaffected, semver); ≥ 7.2.14; ≤ 7.2.* (unaffected, semver). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/3fe820cf35f83534eab72ea73f1a83cfd3cd8079 (CNA: Linux)

- https://git.kernel.org/stable/c/18c373f446068972788158c8c7de6e849b04ed98 (CNA: Linux)

- https://git.kernel.org/stable/c/981621d6eadcd232d4ea748aaeb046337f10d3c1 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-99267; retrieved 2026-11-03; source updated 2026-11-03

Revision: c815c6dab19ade975b0b6962b557b341e9c9287d6c9bcb67ee7bb178b2df3c69

Canonical: https://y2.dev/cve/CVE-2026-99267

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