CVE-2023-6606: Kernel: out-of-bounds read vulnerability in smbcalcsize

Modified

AliasesUBUNTU-CVE-2023-6606DEBIAN-CVE-2023-6606openSUSE-SU-2024:13547-1

Published 08-12-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-6606 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux linux_kernel. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.6% of scored vulnerabilities. 2 public exploits are recorded.

Priority

Prioritisepublic exploit

Public exploit (reference, Date unknown)

Source freshness unavailable

How is this decided?

CVSS score

7.1/10

010

High · v3.1 (CVE.org)

EPSS score

0.53%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits2reference

Timeline

08-12-2023
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

Description

An out-of-bounds read vulnerability was found in smbCalcSize in fs/smb/client/netmisc.c in the Linux Kernel. This issue could allow a local attacker to crash the system or leak internal kernel information.

CVSS metrics

5 scores · 4 sources · 2 versions

v4.07.1v3.17.1

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.53% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found

referenceUnverified
Exploit Reference (bugzilla.kernel.org)
Maturity: unknown
referenceUnverified
Exploit Reference (bugzilla.redhat.com)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu115 products

linuxAll versions (No fix recorded) | < 4.4.0-250.284 | < 4.15.0-221.232 | < 5.4.0-170.188 | < 5.15.0-92.102
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 4.4.0-1127.133 | < 4.4.0-1165.180 | < 4.15.0-1164.177 | < 5.4.0-1117.127 | < 5.15.0-1052.57
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1052.57~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1117.127~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2< 6.2.0-1018.18~22.04.1
linux-aws-6.5All versions (No fix recorded)
linux-aws-fips< 4.15.0-2103.109 | All versions (No fix recorded) | < 5.4.0-1117.127+fips1
linux-aws-hwe< 4.15.0-1164.177~16.04.1
linux-azure< 4.15.0-1173.188~14.04.1 | < 4.15.0-1173.188~16.04.1 | All versions (No fix recorded) | < 5.4.0-1122.129 | < 5.15.0-1054.62
linux-azure-4.15< 4.15.0-1173.188
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1054.62~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1122.129~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2< 6.2.0-1019.19~22.04.1
linux-azure-6.5All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1054.62.1
linux-azure-fde-5.15< 5.15.0-1114.123~20.04.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2< 6.2.0-1019.19~22.04.1.1
linux-azure-fips< 4.15.0-2082.88 | All versions (No fix recorded) | < 5.4.0-1122.129+fips1
linux-bluefield< 5.4.0-1077.83 | < 5.15.0-1033.35
linux-fips< 4.4.0-1097.104 | All versions (No fix recorded) | < 4.15.0-1119.130 | < 5.4.0-1091.101
linux-gcp< 4.15.0-1158.175~16.04.1 | All versions (No fix recorded) | < 5.4.0-1121.130 | < 5.15.0-1049.57
linux-gcp-4.15< 4.15.0-1158.175
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1049.57~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1121.130~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2< 6.2.0-1021.23~22.04.1
linux-gcp-6.5All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2066.71 | All versions (No fix recorded) | < 5.4.0-1121.130+fips1 | < 5.15.0-1055.63+fips2
linux-gkeAll versions (No fix recorded) | < 5.15.0-1049.54
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1084.88 | < 5.15.0-1035.41
linux-gkeop-5.15< 5.15.0-1035.41~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-221.232~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-92.102~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-170.188~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-6.5< 6.5.0-15.15~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1064.69 | < 5.15.0-1045.48
linux-ibm-5.15< 5.15.0-1045.48~20.04.1
linux-ibm-5.4< 5.4.0-1064.69~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1046.48
linux-intel-iotg< 5.15.0-1047.53
linux-intel-iotg-5.15< 5.15.0-1048.54~20.04.1
linux-iot< 5.4.0-1029.30
linux-kvm< 4.4.0-1128.138 | < 4.15.0-1148.153 | < 5.4.0-1105.112 | < 5.15.0-1049.54
linux-lowlatency< 5.15.0-92.102
linux-lowlatency-hwe-5.15< 5.15.0-92.102~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lowlatency-hwe-6.5< 6.5.0-15.15.1.1~22.04.1
linux-lts-xenial< 4.4.0-250.284~14.04.1
linux-nvidia< 5.15.0-1043.43
linux-nvidia-6.2< 6.2.0-1015.15
linux-nvidia-6.5< 6.5.0-1014.14
linux-nvidia-tegra< 5.15.0-1021.21
linux-nvidia-tegra-5.15< 5.15.0-1022.22~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1008.8
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1< 6.1.0-1029.29
linux-oem-6.5< 6.5.0-1013.14
linux-oracle< 4.15.0-1127.138~16.04.1 | < 4.15.0-1127.138 | < 5.4.0-1116.125 | < 5.15.0-1050.56
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1050.56~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1116.125~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-oracle-6.5All versions (No fix recorded)
linux-raspi< 5.4.0-1101.113 | < 5.15.0-1045.48
linux-raspi-5.4< 5.4.0-1101.113~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1053.59
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1048.52~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-xilinx-zynqmp< 5.4.0-1036.40 | < 5.15.0-1027.31

Show all 115

Redhat4 products

enterprise_linux8.0 | 9.0
enterprise_linux_eus9.2 | 9.4
enterprise_linux_server_aus9.2 | 9.4
enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions9.2 | 9.2_ppc64le

Debian1 product

linux< 6.1.76-1 | < 6.6.9-1

Linux1 product

linux_kernelEOL≥ 6.4.1, < 6.7 | 6.4 | 6.4:rc4 | 6.4:rc5 | 6.4:rc6 | 6.4:rc7 | 6.7:rc1 | 6.7:rc2 | 6.7:rc3 | 6.7:rc4 | 6.7:rc5 | 6.7:rc6

Opensuse1 product

kernel-source&distro=openSUSE Tumbleweed< 6.6.9-1.1

5 vendors · 122 products

References

36 links

access.redhat.com/errata/RHSA-2024:0723Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2024:0725Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2024:0881Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2024:0897Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2024:1188Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2024:1248Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2024:1404Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/errata/RHSA-2024:2094Vendor AdvisoryX Refsource REDHATThird Party Advisory
access.redhat.com/security/cve/CVE-2023-6606VDB EntryX Refsource REDHATREPORTThird Party Advisory
bugzilla.kernel.org/show_bug.cgi?id=218218ExploitIssue Tracking

Show all 36 references

bugzilla.redhat.com/show_bug.cgi?id=2253611Issue TrackingX Refsource REDHATExploit
lists.debian.org/debian-lts-announce/2024/01/msg00004.htmlX Transferred
lists.debian.org/debian-lts-announce/2024/06/msg00016.htmlX Transferred
ubuntu.com/security/CVE-2023-6606REPORT
lore.kernel.org/all/20231215225914.20065-1-pc@manguebit.com/REPORT
ubuntu.com/security/notices/USN-6602-1Advisory
ubuntu.com/security/notices/USN-6603-1Advisory
ubuntu.com/security/notices/USN-6604-1Advisory
ubuntu.com/security/notices/USN-6605-1Advisory
ubuntu.com/security/notices/USN-6606-1Advisory
ubuntu.com/security/notices/USN-6607-1Advisory
ubuntu.com/security/notices/USN-6608-1Advisory
ubuntu.com/security/notices/USN-6609-1Advisory
ubuntu.com/security/notices/USN-6604-2Advisory
ubuntu.com/security/notices/USN-6605-2Advisory
ubuntu.com/security/notices/USN-6609-2Advisory
ubuntu.com/security/notices/USN-6609-3Advisory
ubuntu.com/security/notices/USN-6628-1Advisory
ubuntu.com/security/notices/USN-6608-2Advisory
ubuntu.com/security/notices/USN-6635-1Advisory
ubuntu.com/security/notices/USN-6628-2Advisory
www.cve.org/CVERecord?id=CVE-2023-6606REPORT
security-tracker.debian.org/tracker/CVE-2023-6606Advisory
www.suse.com/security/cve/CVE-2023-6606WEB
cert-portal.siemens.com/productcert/html/ssa-794697.html
cert-portal.siemens.com/productcert/html/ssa-613116.html