CVE-2023-1281: UAF in Linux kernel's tcindex (traffic control index filter) implementation

Modified

AliasesUBUNTU-CVE-2023-1281DEBIAN-CVE-2023-1281

Published 22-03-2023Last modified 30-07-2026

Vulnerability summary

CVE-2023-1281 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 23.3% 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

0.30%

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 62 · Related 46

DLA-3403-1 DLA-3404-1 LSN-0094-1 RHSA-2023:3852 RHSA-2023:3853 RHSA-2023:4125+56 more

Timeline

22-03-2023
PublishedVulnerability first disclosed.
30-07-2026
Last modifiedVulnerability information updated.

Description

Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this vulnerability to elevate its privileges to root. This issue affects Linux Kernel: from 4.14 before git commit ee059170b1f7e94e55fa6cadee544e176a6e59c2.

CVSS metrics

4 scores · 4 sources · 1 version

v3.17.8

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.30% 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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.

Ubuntu90 products

linux< 4.15.0-209.220 | < 5.4.0-147.164 | < 5.15.0-70.77
linux-aws< 4.15.0-1154.167 | < 5.4.0-1100.108 | < 5.15.0-1034.38
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< 5.15.0-1034.38~20.04.1
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1100.108~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2093.99 | All versions (No fix recorded) | < 5.4.0-1100.108+fips1
linux-aws-hwe< 4.15.0-1154.167~16.04.1
linux-azure< 4.15.0-1163.178~14.04.1 | < 4.15.0-1163.178~16.04.1 | All versions (No fix recorded) | < 5.4.0-1106.112 | < 5.15.0-1036.43
linux-azure-4.15< 4.15.0-1163.178
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1036.43~20.04.1
linux-azure-5.19< 5.19.0-1023.24~22.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1106.112~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1036.43.1
linux-azure-fips< 4.15.0-2072.78 | All versions (No fix recorded) | < 5.4.0-1106.112+fips1
linux-bluefield< 5.4.0-1062.68 | < 5.15.0-1015.17
linux-dell300x< 4.15.0-1063.68
linux-fips< 4.15.0-1109.120 | All versions (No fix recorded) | < 5.4.0-1075.84
linux-gcp< 4.15.0-1148.164~16.04.1 | All versions (No fix recorded) | < 5.4.0-1103.112 | < 5.15.0-1032.40
linux-gcp-4.15< 4.15.0-1148.164
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1032.40~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1103.112~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2056.61 | All versions (No fix recorded) | < 5.4.0-1103.112+fips1
linux-gke< 5.4.0-1097.104 | < 5.15.0-1031.36
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1031.36~20.04.1
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1067.71 | < 5.15.0-1018.23
linux-gkeop-5.15< 5.15.0-1018.23~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-209.220~16.04.1 | 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< 5.15.0-70.77~20.04.1
linux-hwe-5.19< 5.19.0-40.41~22.04.1
linux-hwe-5.4< 5.4.0-147.164~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1047.52 | < 5.15.0-1028.31
linux-ibm-5.4< 5.4.0-1047.52~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1024.29
linux-intel-iotg< 5.15.0-1028.33
linux-intel-iotg-5.15< 5.15.0-1030.35~20.04.1
linux-iot< 5.4.0-1017.18
linux-kvm< 4.15.0-1138.143 | < 5.4.0-1089.95 | < 5.15.0-1031.36
linux-lowlatency< 5.15.0-70.77
linux-lowlatency-hwe-5.15< 5.15.0-70.77~20.04.1
linux-lowlatency-hwe-5.19< 5.19.0-1022.23~22.04.1
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-5.17< 5.17.0-1030.31
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0< 6.0.0-1013.13
linux-oem-6.1< 6.1.0-1008.8
linux-oracle< 4.15.0-1117.128~16.04.1 | < 4.15.0-1117.128 | < 5.4.0-1099.108 | < 5.15.0-1033.39
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< 5.15.0-1033.39~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1099.108~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1083.94 | < 5.15.0-1027.29
linux-raspi-5.4< 5.4.0-1083.94~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1130.138 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1036.39
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1031.35~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1148.158
linux-xilinx-zynqmp< 5.4.0-1024.28

Show all 90

Debian1 product

linux< 6.1.15-1

Linux1 product

linux_kernel≥ 4.14.0, < 5.10.169 | ≥ 5.11.0, < 5.15.95 | ≥ 5.16.0, < 6.1.13 | ≥ 4.14, < 5.10.169 | ≥ 5.11, < 5.15.95 | ≥ 5.16, < 6.1.13 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4 | 6.2:rc5 | 6.2:rc6 | 6.2:rc7 | 6.2:rc8

3 vendors · 92 products