🛡️ CVE-2023-34319 on Ubuntu — linux
Description
The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.
Distribution advisory
This page covers CVE-2023-34319 as tracked by Ubuntu, for the package linux. The fix is available in version 5.15.0-87.97; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Privileges required: Low — an ordinary user account is enough.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: High — total loss, or loss the attacker controls.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: High — total loss, or loss the attacker controls.
Weakness class
UBUNTU-CVE-2023-34319 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.
Affected software
UBUNTU-CVE-2023-34319 is recorded against 104 packages.
- linux (fixed in 5.15.0-87.97)
- linux-allwinner-5.19
- linux-aws (fixed in 5.15.0-1048.53)
- linux-aws-5.0
- linux-aws-5.11
- linux-aws-5.13
- linux-aws-5.15 (fixed in 5.15.0-1048.53~20.04.1)
- linux-aws-5.19
- linux-aws-5.3
- linux-aws-5.4 (fixed in 5.4.0-1112.121~18.04.2)
- linux-aws-5.8
- linux-aws-6.2 (fixed in 6.2.0-1014.14~22.04.1)
- linux-aws-fips (fixed in 5.4.0-1112.121+fips1)
- linux-aws-hwe (fixed in 4.15.0-1162.175~16.04.1)
- linux-azure (fixed in 5.15.0-1050.57)
- linux-azure-4.15 (fixed in 4.15.0-1171.186)
- linux-azure-5.11
- linux-azure-5.13
- linux-azure-5.15 (fixed in 5.15.0-1050.57~20.04.1)
- linux-azure-5.19
- linux-azure-5.3
- linux-azure-5.4 (fixed in 5.4.0-1118.125~18.04.1)
- linux-azure-5.8
- linux-azure-6.2 (fixed in 6.2.0-1015.15~22.04.1)
Show the remaining 80 packages
- linux-azure-edge
- linux-azure-fde (fixed in 5.15.0-1050.57.1)
- linux-azure-fde-5.19
- linux-azure-fde-6.2 (fixed in 6.2.0-1015.15~22.04.1.1)
- linux-azure-fips (fixed in 5.4.0-1118.125+fips1)
- linux-bluefield
- linux-fips
- linux-gcp (fixed in 5.15.0-1045.53)
- linux-gcp-4.15 (fixed in 4.15.0-1156.173)
- linux-gcp-5.11
- linux-gcp-5.13
- linux-gcp-5.15 (fixed in 5.15.0-1045.53~20.04.2)
- linux-gcp-5.19
- linux-gcp-5.3
- linux-gcp-5.4 (fixed in 5.4.0-1116.125~18.04.1)
- linux-gcp-5.8
- linux-gcp-6.2 (fixed in 6.2.0-1017.19~22.04.1)
- linux-gcp-fips (fixed in 5.4.0-1116.125+fips1)
- linux-gke (fixed in 5.15.0-1045.50)
- linux-gke-4.15
- linux-gke-5.15
- linux-gke-5.4
- linux-gkeop (fixed in 5.15.0-1031.37)
- linux-gkeop-5.15 (fixed in 5.15.0-1031.37~20.04.1)
- linux-gkeop-5.4
- linux-hwe
- linux-hwe-5.11
- linux-hwe-5.13
- linux-hwe-5.15 (fixed in 5.15.0-87.97~20.04.1)
- linux-hwe-5.19
- linux-hwe-5.4 (fixed in 5.4.0-165.182~18.04.1)
- linux-hwe-5.8
- linux-hwe-6.2 (fixed in 6.2.0-35.35~22.04.1)
- linux-hwe-edge
- linux-ibm (fixed in 5.15.0-1041.44)
- linux-ibm-5.15 (fixed in 5.15.0-1041.44~20.04.1)
- linux-ibm-5.4 (fixed in 5.4.0-1059.64~18.04.1)
- linux-intel-5.13
- linux-intel-iot-realtime (fixed in 5.15.0-1041.43)
- linux-intel-iotg (fixed in 5.15.0-1043.49)
- linux-intel-iotg-5.15 (fixed in 5.15.0-1043.49~20.04.1)
- linux-iot (fixed in 5.4.0-1024.25)
- linux-kvm (fixed in 5.15.0-1045.50)
- linux-lowlatency (fixed in 5.15.0-87.96)
- linux-lowlatency-hwe-5.15 (fixed in 5.15.0-87.96~20.04.1)
- linux-lowlatency-hwe-5.19
- linux-lowlatency-hwe-6.2 (fixed in 6.2.0-1015.15~22.04.1)
- linux-lts-xenial (fixed in 4.4.0-246.280~14.04.1)
- linux-nvidia (fixed in 5.15.0-1039.39)
- linux-nvidia-6.2 (fixed in 6.2.0-1011.11)
- linux-nvidia-tegra (fixed in 5.15.0-1019.19)
- linux-nvidia-tegra-5.15 (fixed in 5.15.0-1019.19~20.04.1)
- linux-nvidia-tegra-igx (fixed in 5.15.0-1006.6)
- linux-oem
- linux-oem-5.10
- linux-oem-5.13
- linux-oem-5.14
- linux-oem-5.6
- linux-oem-6.1 (fixed in 6.1.0-1021.21)
- linux-oracle (fixed in 5.15.0-1046.52)
- linux-oracle-5.0
- linux-oracle-5.11
- linux-oracle-5.13
- linux-oracle-5.15 (fixed in 5.15.0-1046.52~20.04.1)
- linux-oracle-5.3
- linux-oracle-5.4 (fixed in 5.4.0-1111.120~18.04.1)
- linux-oracle-5.8
- linux-raspi (fixed in 5.15.0-1041.44)
- linux-raspi-5.4 (fixed in 5.4.0-1096.107~18.04.1)
- linux-raspi-realtime
- linux-raspi2
- linux-realtime (fixed in 5.15.0-1049.55)
- linux-riscv
- linux-riscv-5.11
- linux-riscv-5.15 (fixed in 5.15.0-1044.48~20.04.1)
- linux-riscv-5.19
- linux-riscv-5.8
- linux-starfive-5.19
- linux-starfive-6.2 (fixed in 6.2.0-1007.8~22.04.1)
- linux-xilinx-zynqmp (fixed in 5.15.0-1025.29)
Timeline and source
Published on 9 August 2023 and last revised on 17 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
git.kernel.org (Report)
marc.info (Report)
xenbits.xen.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)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
www.cve.org (Report)
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-w6xv-3fg4-grm5 (published 29 Jan 2026)
- CGA-mcwh-q4vm-9f29 (published 29 Jan 2026)
- CGA-2qp7-6757-fmgc (published 7 Jan 2026)
- CGA-9p62-x2f6-7rmw (published 7 Jan 2026)
Same weakness in other software
These advisories are the same class of weakness (CWE-787: Out-of-bounds Write) in other software:
- CVE-2019-9423 (8.0 High, published 9 Jul 2026)
- CVE-2018-5268 (published 9 Jul 2026)
- CVE-2017-12606 (8.0 High, published 9 Jul 2026)
- CVE-2019-5063 (8.0 High, published 9 Jul 2026)
- CVE-2017-12605 (8.0 High, published 9 Jul 2026)
- CVE-2022-29208 (8.0 High, published 9 Jul 2026)
- CVE-2022-23561 (8.0 High, published 9 Jul 2026)
- CVE-2017-12603 (8.0 High, published 2 Jul 2026)
CVE-2023-34319 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.15.0-87.97 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 5.15.0-1048.53 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1048.53~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | 5.4.0-1112.121~18.04.2 |
| linux-aws-5.8 | — | — |
| linux-aws-6.2 | — | 6.2.0-1014.14~22.04.1 |
| linux-aws-fips | — | 5.4.0-1112.121+fips1 |
| linux-aws-hwe | — | 4.15.0-1162.175~16.04.1 |
| linux-azure | — | 5.15.0-1050.57 |
| linux-azure-4.15 | — | 4.15.0-1171.186 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1050.57~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | 5.4.0-1118.125~18.04.1 |
| linux-azure-5.8 | — | — |
| linux-azure-6.2 | — | 6.2.0-1015.15~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 5.15.0-1050.57.1 |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.2 | — | 6.2.0-1015.15~22.04.1.1 |
| linux-azure-fips | — | 5.4.0-1118.125+fips1 |
| linux-bluefield | — | — |
| linux-fips | — | — |
| linux-gcp | — | 5.15.0-1045.53 |
| linux-gcp-4.15 | — | 4.15.0-1156.173 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1045.53~20.04.2 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | 5.4.0-1116.125~18.04.1 |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.2 | — | 6.2.0-1017.19~22.04.1 |
| linux-gcp-fips | — | 5.4.0-1116.125+fips1 |
| linux-gke | — | 5.15.0-1045.50 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1031.37 |
| linux-gkeop-5.15 | — | 5.15.0-1031.37~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-87.97~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.4 | — | 5.4.0-165.182~18.04.1 |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.2 | — | 6.2.0-35.35~22.04.1 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1041.44 |
| linux-ibm-5.15 | — | 5.15.0-1041.44~20.04.1 |
| linux-ibm-5.4 | — | 5.4.0-1059.64~18.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1041.43 |
| linux-intel-iotg | — | 5.15.0-1043.49 |
| linux-intel-iotg-5.15 | — | 5.15.0-1043.49~20.04.1 |
| linux-iot | — | 5.4.0-1024.25 |
| linux-kvm | — | 5.15.0-1045.50 |
| linux-lowlatency | — | 5.15.0-87.96 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-87.96~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.2 | — | 6.2.0-1015.15~22.04.1 |
| linux-lts-xenial | — | 4.4.0-246.280~14.04.1 |
| linux-nvidia | — | 5.15.0-1039.39 |
| linux-nvidia-6.2 | — | 6.2.0-1011.11 |
| linux-nvidia-tegra | — | 5.15.0-1019.19 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1019.19~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1006.6 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.1 | — | 6.1.0-1021.21 |
| linux-oracle | — | 5.15.0-1046.52 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1046.52~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | 5.4.0-1111.120~18.04.1 |
| linux-oracle-5.8 | — | — |
| linux-raspi | — | 5.15.0-1041.44 |
| linux-raspi-5.4 | — | 5.4.0-1096.107~18.04.1 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 5.15.0-1049.55 |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1044.48~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | 6.2.0-1007.8~22.04.1 |
| linux-xilinx-zynqmp | — | 5.15.0-1025.29 |
References
Similar Threats
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