CVE-2023-1077: In the Linux kernel, pick_next_rt_entity() may return a type confused entry, not detected by the BUG_ON condit

Q: How do I fix CVE-2023-1077?

linux kernel: upgrade to 4.19.293, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3; debian linux: mitigate or apply the listed mitigation; a700s firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2023-1077 being exploited?

CVE-2023-1077 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-1077 affect?

CVE-2023-1077 affects linux kernel, debian linux, a700s firmware. Severity is high (CVSS 7.0). In the Linux kernel, pick_next_rt_entity() may return a type confused entry, not detected by the BUG_ON condition, as the confused entry will not be NULL, but list_head.The buggy error condition would lead to a type confused entry with the

Q: How urgent is CVE-2023-1077?

Priority 35/100. High severity; On your watchlist

Routine

HIGH 7.0WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2023-1077 is a high-severity flaw (CVSS 7.0) affecting linux kernel, debian linux, a700s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Linux kernel, pick_next_rt_entity() may return a type confused entry, not detected by the BUG_ON condition, as the confused entry will not be NULL, but list_head.The buggy error condition would lead to a type confused entry with the list head,which would then be used as a type confused sched_rt_entity,causing memory corruption.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-843
Published	2023-03-27
Last modified	2026-10-14

Publisher (CNA): Red Hat, Inc. · Vendor: debian · linux · netapp

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-03-27 21:15 UTCPublished CVE record published
2026-10-14 21:17 UTCUpdated Record last modified

linux linux kernel UPGRADE

Affected: >= 2.6.25 and < 4.19.293 · >= 4.20 and < 5.4.235 · >= 5.5 and < 5.10.173 · >= 5.11 and < 5.15.99 · >= 5.16 and < 6.1.16 · >= 6.2 and < 6.2.3

Fixed in: 4.19.293, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp a700s firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp 8300 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp 8700 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netapp a400 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-1077?

linux kernel: upgrade to 4.19.293, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3; debian linux: mitigate or apply the listed mitigation; a700s firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-1077 being exploited?

CVE-2023-1077 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-1077 affect?

CVE-2023-1077 affects linux kernel, debian linux, a700s firmware. Severity is high (CVSS 7.0). In the Linux kernel, pick_next_rt_entity() may return a type confused entry, not detected by the BUG_ON condition, as the confused entry will not be NULL, but list_head.The buggy error condition would lead to a type confused entry with the

How urgent is CVE-2023-1077?

Priority 35/100. High severity; On your watchlist

Software pages

Linux kernel vulnerabilities · Debian vulnerabilities

Related CVEs

CVE-2026-63912 CRITICAL 9.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: restore combined single-frag l
CVE-2026-63913 HIGH 8.2 UPGRADE In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: tcp: do not force C
CVE-2026-63914 HIGH 7.3 UPGRADE In the Linux kernel, the following vulnerability has been resolved: xfrm: route MIGRATE notifications to call
CVE-2026-63915 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: nfc: hci: fix out-of-bounds read in HCP h
CVE-2026-63916 HIGH 8.8 UPGRADE In the Linux kernel, the following vulnerability has been resolved: HID: wacom: Fix OOB write in wacom_hid_se

References

← Back to latest CVEs