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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
  • Fixed version: Linux Linux 5.10.264, 5.15.215, 52db77a13be224e09eb4ba6b4252ae8ab9085c2c.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 5.10.264, 5.15.215, 52db77a13be224e09eb4ba6b4252ae8ab9085c2c or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Aug 6, 2026
Updated
Aug 18, 2026
EPSS
0.2% · 14th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • acdc883eb61efbe01b954e782e1124790bd391a8, 6.5affected
    • 3f9b7101bea1dcb63410c016ceb266f6e9f733c9 and later · before dfefa3c51370f84acb643cddf98bb42c885d0483affected · git
    • b35087763a44d1eb45857f799579a351332be505 and later · before 52db77a13be224e09eb4ba6b4252ae8ab9085c2caffected · git
    • ac41e90d8daa8815d8bee774a1975435fbfe1ae7 and later · before d0208e08d64d99383e09852a76cc3038c5a4c3abaffected · git
    • fb3bd914b3ec28f5fb697ac55c4846ac2d542855 and later · before 6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096affected · git
    • fb3bd914b3ec28f5fb697ac55c4846ac2d542855 and later · before e262f28a69ae9e0791248f93b0173c1d1f3e1d5daffected · git
    • fb3bd914b3ec28f5fb697ac55c4846ac2d542855 and later · before bfe7f9993467ba431b2731437949ac1e2634e771affected · git
    • fb3bd914b3ec28f5fb697ac55c4846ac2d542855 and later · before 61649a2d61cb0dbc673f0f232f0f0c298bf50442affected · git
    • fb3bd914b3ec28f5fb697ac55c4846ac2d542855 and later · before 7e7f81cf6f5ca3311e526308f55d7c54d3ba71f9affected · git
    • 5.10.189 and later · before 5.10.264affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.159.1.el8_104.18.0-553.159.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.159.1.rt7.500.el8_104.18.0-553.159.1.rt7.500.el8_10

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-64598Aug 6, 2026 · smb/client: Fix error code in smb2_aead_req_alloc()
    35Monitor
  • ← EarlierCVE-2026-64599Aug 6, 2026 · crypto: amlogic - avoid double cleanup in meson_crypto_probe()
    31Monitor
  • Later →CVE-2026-68081Aug 8, 2026 · KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest state
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux5.10.264Vendor (CNA)
Linux Linux5.15.215Vendor (CNA)
Linux Linux52db77a13be224e09eb4ba6b4252ae8ab9085c2cVendor (CNA)
Linux Linux6.1.182Vendor (CNA)
Linux Linux6.5Vendor (CNA)
Linux Linux61649a2d61cb0dbc673f0f232f0f0c298bf50442Vendor (CNA)
Linux Linux6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096Vendor (CNA)
Linux Linux7e7f81cf6f5ca3311e526308f55d7c54d3ba71f9Vendor (CNA)
Linux Linuxbfe7f9993467ba431b2731437949ac1e2634e771Vendor (CNA)
Linux Linuxd0208e08d64d99383e09852a76cc3038c5a4c3abVendor (CNA)
Linux Linuxdfefa3c51370f84acb643cddf98bb42c885d0483Vendor (CNA)
Linux Linuxe262f28a69ae9e0791248f93b0173c1d1f3e1d5dVendor (CNA)
almalinux:bpftool4.18.0-553.159.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.159.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-553.159.1.rt7.500.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)
red hat:kernel-rt0:4.18.0-553.159.1.rt7.500.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-core0:4.18.0-553.159.1.rt7.500.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug0:4.18.0-553.159.1.rt7.500.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:4.18.0-553.159.1.rt7.500.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)

+10

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records