7.8

CVE-2023-52628: netfilter: nftables: exthdr: fix 4-byte stack OOB write

Modified
AliasesUBUNTU-CVE-2023-52628DEBIAN-CVE-2023-52628
Published 28-03-2024Last modified 05-08-2026

Vulnerability summary

CVE-2023-52628 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 51.9% 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
0.67%
0%100%
Low · -0.01 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 25 · Related 19
DLA-3840-1RHSA-2024:2394RHSA-2024:2845RHSA-2024:2846RHSA-2024:3414RHSA-2024:3421

Timeline

  1. 28-03-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.67%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

Decrease -0.01 pp

From 0.68% 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.

Ubuntu109 products
  • linux< 4.4.0-246.280 | < 4.15.0-219.230 | < 5.4.0-165.182 | < 5.15.0-87.97
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1124.130 | < 4.4.0-1162.177 | < 4.15.0-1162.175 | < 5.4.0-1112.121 | < 5.15.0-1048.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 49499c3e6e18b7677a63316f3ff54a16533dc28f, < 28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a | ≥ 49499c3e6e18b7677a63316f3ff54a16533dc28f, < cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb | ≥ 49499c3e6e18b7677a63316f3ff54a16533dc28f, < a7d86a77c33ba1c357a7504341172cc1507f0698 | ≥ 49499c3e6e18b7677a63316f3ff54a16533dc28f, < 1ad7b189cc1411048434e8595ffcbe7873b71082 | ≥ 49499c3e6e18b7677a63316f3ff54a16533dc28f, < d9ebfc0f21377690837ebbd119e679243e0099cc | ≥ 49499c3e6e18b7677a63316f3ff54a16533dc28f, < c8f292322ff16b9a2272a67de396c09a50e09dce | ≥ 49499c3e6e18b7677a63316f3ff54a16533dc28f, < fd94d9dadee58e09b49075240fe83423eb1dcd36 | 4.1
  • linux_kernel≥ 4.1, < 5.10.198 | ≥ 5.11, < 5.15.132 | ≥ 5.16, < 6.1.54 | ≥ 6.2, < 6.5.4
Debian1 product
  • linux< 6.1.55-1 | < 6.5.6-1

3 vendors · 112 products

References

12 links
Show all 12 references