CVE-2023-32233: linux linux_kernel Use After Free

Modified

AliasesALPINE-CVE-2023-32233RHSA-2023:3350RHSA-2023:3351+2 more

Published 08-05-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-32233 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 13.44% chance of exploitation in the next 30 days, higher than 96.4% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

7.8/10

010

High · v3.1 (CVE.org)

EPSS score

13.44%

0%100%

Medium · +0.48 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 67 · Related 37

DLA-3446-1 DLA-3508-1 DSA-5402-1 LSN-0095-1 MGASA-2023-0166 MGASA-2023-0201+61 more

Timeline

08-05-2023
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

Description

In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.

CVSS metrics

6 scores · 6 sources · 1 version

v3.17.8

EPSS trend

Probability

13.44%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

Increase +0.48 pp

From 12.97% 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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.

Ubuntu91 products

linuxAll versions (No fix recorded) | < 4.4.0-241.275 | < 4.15.0-212.223 | < 5.4.0-150.167 | < 5.15.0-73.80
linux-aws< 4.4.0-1119.125 | < 4.4.0-1157.172 | < 4.15.0-1157.170 | < 5.4.0-1103.111 | < 5.15.0-1037.41
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< 5.15.0-1037.41~20.04.1
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1103.111~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2096.102 | All versions (No fix recorded) | < 5.4.0-1103.111+fips1
linux-aws-hwe< 4.15.0-1157.170~16.04.1
linux-azure< 4.15.0-1166.181~14.04.1 | < 4.15.0-1166.181~16.04.1 | All versions (No fix recorded) | < 5.4.0-1109.115 | < 5.15.0-1039.46
linux-azure-4.15< 4.15.0-1166.181
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1039.46~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1109.115~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1039.46.1
linux-azure-fips< 4.15.0-2075.81 | All versions (No fix recorded) | < 5.4.0-1109.115+fips1
linux-bluefield< 5.4.0-1064.70 | < 5.15.0-1017.19
linux-fips< 4.4.0-1089.96 | All versions (No fix recorded) | < 4.15.0-1112.123 | < 5.4.0-1078.87
linux-gcp< 4.15.0-1151.167~16.04.1 | All versions (No fix recorded) | < 5.4.0-1106.115 | < 5.15.0-1035.43
linux-gcp-4.15< 4.15.0-1151.167
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1035.43~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1106.115~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2059.64 | All versions (No fix recorded) | < 5.4.0-1106.115+fips1
linux-gke< 5.4.0-1100.107 | < 5.15.0-1034.39
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1034.39~20.04.1
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1070.74 | < 5.15.0-1021.26
linux-gkeop-5.15< 5.15.0-1021.26~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-212.223~16.04.1 | 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< 5.15.0-73.80~20.04.1
linux-hwe-5.19< 5.19.0-43.44~22.04.1
linux-hwe-5.4< 5.4.0-150.167~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1050.55 | < 5.15.0-1031.34
linux-ibm-5.4< 5.4.0-1050.55~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1028.33
linux-intel-iotg< 5.15.0-1031.36
linux-intel-iotg-5.15< 5.15.0-1031.36~20.04.1
linux-iot< 5.4.0-1017.18
linux-kvm< 4.4.0-1120.130 | < 4.15.0-1141.146 | < 5.4.0-1092.98 | < 5.15.0-1034.39
linux-lowlatency< 5.15.0-73.80
linux-lowlatency-hwe-5.15< 5.15.0-73.80~20.04.1
linux-lowlatency-hwe-5.19< 5.19.0-1025.26~22.04.1
linux-lts-xenial< 4.4.0-241.275~14.04.1
linux-nvidia< 5.15.0-1026.26
linux-nvidia-tegra< 5.15.0-1014.14
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-5.17< 5.17.0-1032.33
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0< 6.0.0-1017.17
linux-oem-6.1< 6.1.0-1013.13
linux-oracle< 4.15.0-1120.131~16.04.1 | < 4.15.0-1120.131 | < 5.4.0-1102.111 | < 5.15.0-1036.42
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< 5.15.0-1036.42~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1102.111~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1086.97 | < 5.15.0-1030.32
linux-raspi-5.4< 5.4.0-1086.97~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1039.42
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1034.38~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1151.161
linux-xilinx-zynqmp< 5.4.0-1024.28

Show all 91

Redhat19 products

enterprise_linuxEOL7.0 | 8.0 | 9.0
kernel-rt< 0:4.18.0-477.13.1.rt7.276.el8_8
kernel-rt-core< 0:4.18.0-477.13.1.rt7.276.el8_8
kernel-rt-debug< 0:4.18.0-477.13.1.rt7.276.el8_8
kernel-rt-debug-core< 0:4.18.0-477.13.1.rt7.276.el8_8

Show all 19

Alpine1 product

linux-lts< 6.1.27-r3

Debian1 product

linux< 6.1.27-1

Linux1 product

linux_kernel≥ 3.13, < 4.14.315 | ≥ 4.15, < 4.19.283 | ≥ 4.20, < 5.4.243 | ≥ 5.5, < 5.10.180 | ≥ 5.11, < 5.15.111 | ≥ 5.16, < 6.1.28 | ≥ 6.2, < 6.2.15 | ≥ 6.3, < 6.3.2

Netapp1 product

hci_baseboard_management_controllerh300s | h410c | h410s | h500s | h700s

6 vendors · 114 products

References

40 links

www.openwall.com/lists/oss-security/2023/05/08/4ARTICLEREPORTMailing ListPatchThird Party Advisory
github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edabARTICLEPatch
git.kernel.org/cgit/…Mailing ListPatch
news.ycombinator.com/item?id=35879660Issue Tracking
bugzilla.redhat.com/show_bug.cgi?id=2196105REPORTIssue TrackingMitigationThird Party Advisory
www.debian.org/security/2023/dsa-5402Vendor AdvisoryMailing ListThird Party Advisory
www.openwall.com/lists/oss-security/2023/05/15/5Mailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2023/06/msg00008.htmlMailing ListThird Party Advisory
security.netapp.com/advisory/ntap-20230616-0002/Mailing ListThird Party Advisory
packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.htmlPatchThird Party Advisory

Show all 40 references

lists.debian.org/debian-lts-announce/2023/07/msg00030.htmlMailing ListThird Party Advisory
security.alpinelinux.org/vuln/CVE-2023-32233Advisory
access.redhat.com/errata/RHSA-2023:3350Advisory
access.redhat.com/security/updates/classification/ARTICLE
security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_3350.jsonAdvisory
access.redhat.com/security/cve/CVE-2023-32233REPORT
www.cve.org/CVERecord?id=CVE-2023-32233AdvisoryREPORT
nvd.nist.gov/vuln/detail/CVE-2023-32233AdvisoryOval
access.redhat.com/errata/RHSA-2023:3351Advisory
security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_3351.jsonAdvisory
ubuntu.com/security/CVE-2023-32233REPORT
www.openwall.com/lists/oss-security/2023/05/15/5REPORT
ubuntu.com/security/notices/USN-6122-1Advisory
ubuntu.com/security/notices/USN-6123-1Advisory
ubuntu.com/security/notices/USN-6124-1Advisory
ubuntu.com/security/notices/USN-6127-1Advisory
ubuntu.com/security/notices/USN-6130-1Advisory
ubuntu.com/security/notices/USN-6131-1Advisory
ubuntu.com/security/notices/USN-6132-1Advisory
ubuntu.com/security/notices/USN-6135-1Advisory
ubuntu.com/security/notices/USN-6149-1Advisory
ubuntu.com/security/notices/USN-6150-1Advisory
ubuntu.com/security/notices/USN-6162-1Advisory
ubuntu.com/security/notices/USN-6175-1Advisory
ubuntu.com/security/notices/USN-6186-1Advisory
ubuntu.com/security/notices/USN-6222-1Advisory
ubuntu.com/security/notices/USN-6256-1Advisory
security-tracker.debian.org/tracker/CVE-2023-32233Advisory
cert-portal.siemens.com/productcert/html/ssa-794697.html
cert-portal.siemens.com/productcert/html/ssa-806742.html