# CVE-2026-68480: x86/bugs: Make Safe-RET robust against interrupt injection

Status: published. Published: 2026-08-06. Updated: 2026-11-06.

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

x86/bugs: Make Safe-RET robust against interrupt injection

An attacker injecting interrupts while the Safe-RET mitigation executes
on machines affected by SRSO can neutralize the safe return sequence,
potentially leading to data leakage through speculative execution.

Fixup register state as if the Safe-RET sequence executed successfully
by "emulating" it, in a manner of speaking, and avoid executing a RET
instruction after returning from the interrupt.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 3f9b7101bea1dcb63410c016ceb266f6e9f733c9; < dfefa3c51370f84acb643cddf98bb42c885d0483 (affected, git); ≥ b35087763a44d1eb45857f799579a351332be505; < 52db77a13be224e09eb4ba6b4252ae8ab9085c2c (affected, git); ≥ ac41e90d8daa8815d8bee774a1975435fbfe1ae7; < d0208e08d64d99383e09852a76cc3038c5a4c3ab (affected, git); ≥ fb3bd914b3ec28f5fb697ac55c4846ac2d542855; < 6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096 (affected, git); ≥ fb3bd914b3ec28f5fb697ac55c4846ac2d542855; < e262f28a69ae9e0791248f93b0173c1d1f3e1d5d (affected, git); ≥ fb3bd914b3ec28f5fb697ac55c4846ac2d542855; < bfe7f9993467ba431b2731437949ac1e2634e771 (affected, git); ≥ fb3bd914b3ec28f5fb697ac55c4846ac2d542855; < 61649a2d61cb0dbc673f0f232f0f0c298bf50442 (affected, git); ≥ fb3bd914b3ec28f5fb697ac55c4846ac2d542855; < 7e7f81cf6f5ca3311e526308f55d7c54d3ba71f9 (affected, git); acdc883eb61efbe01b954e782e1124790bd391a8 (affected, git); ≥ 5.10.189; < 5.10.264 (affected, semver); ≥ 5.15.125; < 5.15.215 (affected, semver); ≥ 6.1.44; < 6.1.182 (affected, semver); ≥ 6.4.9; < 6.5 (affected, semver). Source: CNA: Linux
- Linux / Linux: 6.5 (affected); ≥ 0; < 6.5 (unaffected, semver); ≥ 5.10.264; ≤ 5.10.* (unaffected, semver); ≥ 5.15.215; ≤ 5.15.* (unaffected, semver); ≥ 6.1.182; ≤ 6.1.* (unaffected, semver); ≥ 6.6.150; ≤ 6.6.* (unaffected, semver); ≥ 6.12.102; ≤ 6.12.* (unaffected, semver); ≥ 6.18.43; ≤ 6.18.* (unaffected, semver); ≥ 7.1.7; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.23% as of 2026-11-06; percentile 14.44%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- 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/dfefa3c51370f84acb643cddf98bb42c885d0483 (CNA: Linux)

- https://git.kernel.org/stable/c/52db77a13be224e09eb4ba6b4252ae8ab9085c2c (CNA: Linux)

- https://git.kernel.org/stable/c/d0208e08d64d99383e09852a76cc3038c5a4c3ab (CNA: Linux)

- https://git.kernel.org/stable/c/6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096 (CNA: Linux)

- https://git.kernel.org/stable/c/e262f28a69ae9e0791248f93b0173c1d1f3e1d5d (CNA: Linux)

- https://git.kernel.org/stable/c/bfe7f9993467ba431b2731437949ac1e2634e771 (CNA: Linux)

- https://git.kernel.org/stable/c/61649a2d61cb0dbc673f0f232f0f0c298bf50442 (CNA: Linux)

- https://git.kernel.org/stable/c/7e7f81cf6f5ca3311e526308f55d7c54d3ba71f9 (CNA: Linux)

- https://people.csail.mit.edu/mengjia/data/2026.USENIX.TONTOU.pdf (CNA: Linux)

- https://git.kernel.org/stable/c/52db77a13be224e09eb4ba6b4252ae8ab9085c2c (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/61649a2d61cb0dbc673f0f232f0f0c298bf50442 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/7e7f81cf6f5ca3311e526308f55d7c54d3ba71f9 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/bfe7f9993467ba431b2731437949ac1e2634e771 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/d0208e08d64d99383e09852a76cc3038c5a4c3ab (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/dfefa3c51370f84acb643cddf98bb42c885d0483 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/e262f28a69ae9e0791248f93b0173c1d1f3e1d5d (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://people.csail.mit.edu/mengjia/data/2026.USENIX.TONTOU.pdf (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-68480; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68480; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-68480; retrieved 2026-11-06; source updated Not reported

Revision: f8c88ed4905c3267bb4e8cb7b0025a8bad5195aaa345a41fcab740d40f4f4283

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