🛡️ CVE-2023-6356 on Ubuntu — linux

Distribution advisory

This page covers CVE-2023-6356 as tracked by Ubuntu, for the package linux. The fix is available in version 5.15.0-102.112; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: None.
• Integrity impact: None.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

UBUNTU-CVE-2023-6356 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.

Affected software

UBUNTU-CVE-2023-6356 is recorded against 113 packages.

• linux (fixed in 5.15.0-102.112)
• linux-allwinner-5.19
• linux-aws (fixed in 5.15.0-1057.63)
• linux-aws-5.0
• linux-aws-5.11
• linux-aws-5.13
• linux-aws-5.15 (fixed in 5.15.0-1057.63~20.04.1)
• linux-aws-5.19
• linux-aws-5.3
• linux-aws-5.4 (fixed in 5.4.0-1122.132~18.04.1)
• linux-aws-5.8
• linux-aws-6.2
• linux-aws-6.5
• linux-aws-fips (fixed in 5.15.0-1057.63+fips1)
• linux-azure (fixed in 5.15.0-1060.69)
• linux-azure-5.11
• linux-azure-5.13
• linux-azure-5.15 (fixed in 5.15.0-1060.69~20.04.1)
• linux-azure-5.19
• linux-azure-5.3
• linux-azure-5.4 (fixed in 5.4.0-1127.134~18.04.1)
• linux-azure-5.8
• linux-azure-6.2
• linux-azure-6.5 (fixed in 6.5.0-1022.23~22.04.1)

Timeline and source

Published on 7 February 2024 and last revised on 17 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
lore.kernel.org (Report)
www.cve.org (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)

Other advisories for this package

linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

• DEBIAN-CVE-2022-4994 (published 30 Jul 2026)
• CVE-2026-35233 (4.4 Medium, published 1 May 2026)
• CVE-2026-21996 (3.3 Low, published 1 May 2026)
• CVE-2026-21991 (5.5 Medium, published 16 Mar 2026)
• CGA-mcwh-q4vm-9f29 (published 29 Jan 2026)
• CGA-w6xv-3fg4-grm5 (published 29 Jan 2026)
• CGA-g2p8-xhwc-x7hp (published 7 Jan 2026)
• CGA-w3j3-57xg-5mm7 (published 7 Jan 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-476: NULL Pointer Dereference) in other software:

• CVE-2022-36000 (8.0 High, published 13 Jul 2026)
• CVE-2023-25660 (8.0 High, published 13 Jul 2026)
• CVE-2022-35965 (8.0 High, published 13 Jul 2026)
• CVE-2023-25674 (8.0 High, published 13 Jul 2026)
• CVE-2022-36014 (8.0 High, published 13 Jul 2026)
• CVE-2023-25670 (8.0 High, published 13 Jul 2026)
• CVE-2022-36013 (8.0 High, published 13 Jul 2026)
• CVE-2023-25665 (8.0 High, published 13 Jul 2026)

CVE-2023-6356 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References