7.8

CVE-2023-1829: Use-after-free in tcindex (traffic control index filter) in the Linux Kernel

Modified
AliasesSUSE-SU-2023:4097-1SUSE-SU-2023:4264-1SUSE-SU-2023:4774-1
Published 12-04-2023Last modified 29-07-2026

Vulnerability summary

CVE-2023-1829 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 1.06% chance of exploitation in the next 30 days, higher than 64.4% 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
1.06%
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 147 · Related 130
DLA-3403-1DLA-3404-1MGASA-2023-0148MGASA-2023-0149RHSA-2023:4515RHSA-2023:4516

Showing 100 of 147.

Timeline

  1. 12-04-2023
    PublishedVulnerability first disclosed.
  2. 29-07-2026
    Last modifiedVulnerability information updated.

Description

A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ .

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

1.06%

Chance of exploitation in the next 30 days

Percentile

64%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.06% 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

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) | < 4.4.0-240.274 | < 4.15.0-210.221 | < 5.4.0-148.165 | < 5.15.0-71.78
  • linux-aws< 4.4.0-1118.124 | < 4.4.0-1156.171 | < 4.15.0-1155.168 | < 5.4.0-1101.109 | < 5.15.0-1035.39
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
Suse19 products
  • kernel-livepatch-SLE15-SP1_Update_45&distro=SUSE Linux Enterprise Live Patching 15 SP1< 2-150100.2.1
  • kernel-livepatch-SLE15-SP1_Update_47&distro=SUSE Linux Enterprise Live Patching 15 SP1< 2-150100.2.1
  • kernel-livepatch-SLE15-SP2_Update_41&distro=SUSE Linux Enterprise Live Patching 15 SP2< 2-150200.2.1
  • kernel-livepatch-SLE15-SP2_Update_42&distro=SUSE Linux Enterprise Live Patching 15 SP2< 2-150200.2.1
  • kernel-livepatch-SLE15-SP2_Update_44&distro=SUSE Linux Enterprise Live Patching 15 SP2< 2-150200.2.1
Debian1 product
  • linux< 6.1.20-1
Linux1 product
  • linux_kernel≥ 3.8.0, < 4.14.308 | ≥ 4.15.0, < 4.19.276 | ≥ 4.20.0, < 5.4.235 | ≥ 5.5.0, < 5.10.173 | ≥ 5.11.0, < 5.15.100 | ≥ 5.16.0, < 6.1.18 | ≥ 6.2.0, < 6.2.5 | < 4.14.308 | ≥ 4.15, < 4.19.276 | ≥ 4.20, < 5.4.235 | ≥ 5.5, < 5.10.173 | ≥ 5.11, < 5.15.100 | ≥ 5.16, < 6.1.18 | ≥ 6.2, < 6.2.5
Opensuse1 product
  • suse-module-tools&distro=openSUSE Tumbleweed< 16.0.36-1.1

5 vendors · 113 products

References

44 links
Show all 44 references