CVE-2023-1195: linux linux_kernel Use After Free

Modified

AliasesUBUNTU-CVE-2023-1195DEBIAN-CVE-2023-1195

Published 18-05-2023Last modified 18-03-2025

Vulnerability summary

CVE-2023-1195 is a medium (CVSS 5.5) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.9% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.5/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.21%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 2

RHSA-2023:2148 RHSA-2023:2458 RHSA-2023:2736 RHSA-2023:2951 RHSA-2024:0412 RHSA-2024:0431+3 more

Timeline

18-05-2023
PublishedVulnerability first disclosed.
18-03-2025
Last modifiedVulnerability information updated.

Description

A use-after-free flaw was found in reconn_set_ipaddr_from_hostname in fs/cifs/connect.c in the Linux kernel. The issue occurs when it forgets to set the free pointer server->hostname to NULL, leading to an invalid pointer request.

CVSS metrics

4 scores · 4 sources · 1 version

v3.15.5

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% 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

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Version check

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

Ubuntu78 products

linux< 5.4.0-99.112 | < 5.15.0-67.74
linux-aws< 5.4.0-1065.68 | < 5.15.0-1031.35
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< 5.15.0-1031.35~20.04.1
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1065.68~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-azureAll versions (No fix recorded) | < 5.15.0-1034.41
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1034.41~20.04.1
linux-azure-5.19< 5.19.0-1022.23~22.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4All versions (No fix recorded)
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1034.41.1
linux-azure-fipsAll versions (No fix recorded)
linux-bluefield< 5.4.0-1028.31 | < 5.15.0-1014.16
linux-fips< 5.4.0-1042.48
linux-gcpAll versions (No fix recorded) | < 5.4.0-1064.68 | < 5.15.0-1030.37
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1030.37~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1064.68~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gke< 5.4.0-1062.65 | < 5.15.0-1028.33
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1028.33~20.04.1
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1033.34 | < 5.15.0-1016.21
linux-gkeop-5.15< 5.15.0-1016.21~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hweAll versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-67.74~20.04.1
linux-hwe-5.19< 5.19.0-38.39~22.04.1
linux-hwe-5.4< 5.4.0-99.112~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1014.15 | < 5.15.0-1026.29
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1022.27
linux-intel-iotg< 5.15.0-1026.31
linux-intel-iotg-5.15< 5.15.0-1026.31~20.04.1
linux-kvm< 5.4.0-1055.57 | < 5.15.0-1029.34
linux-lowlatency< 5.15.0-67.74
linux-lowlatency-hwe-5.15< 5.15.0-67.74~20.04.1
linux-lowlatency-hwe-5.19< 5.19.0-1021.22~22.04.1
linux-nvidia< 5.15.0-1023.23
linux-nvidia-tegra-5.15< 5.15.0-1014.14~20.04.1
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-oracle< 5.4.0-1063.67 | < 5.15.0-1030.36
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< 5.15.0-1030.36~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1063.67~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.15.0-1025.27
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1033.36
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1030.34~20.04.1
linux-riscv-5.8All versions (No fix recorded)

Show all 78

Debian1 product

linux< 6.1.4-1

Linux1 product

linux_kernel< 6.1 | 6.1:rc1 | 6.1:rc2

3 vendors · 80 products

References

8 links

github.com/torvalds/linux/commit/153695d36ead0ccc4d0256953c751cabf673e621Patch
ubuntu.com/security/CVE-2023-1195REPORT
git.kernel.org/linus/153695d36ead0ccc4d0256953c751cabf673e621REPORT
ubuntu.com/security/notices/USN-5970-1Advisory
ubuntu.com/security/notices/USN-5979-1Advisory
www.cve.org/CVERecord?id=CVE-2023-1195REPORT
security-tracker.debian.org/tracker/CVE-2023-1195Advisory
nvd.nist.gov/vuln/detail/CVE-2023-1195OvalAdvisory