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Review reviewHigh

CVE-2023-52628

Linux Linux, linux kernel

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,...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.03.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

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,...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 49499c3e6e18b7677a63316f3ff54a16533dc28f < 28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a, >= 49499c3e6e18b7677a63316f3ff54a16533dc28f < cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb, >= 49499c3e6e18b7677a63316f3ff54a16533dc28f < a7d86a77c33ba1c357a7504341172cc1507f0698, >= 49499c3e6e18b7677a63316f3ff54a16533dc28f < 1ad7b189cc1411048434e8595ffcbe7873b71082, >= 49499c3e6e18b7677a63316f3ff54a16533dc28f < d9ebfc0f21377690837ebbd119e679243e0099cc, >= 49499c3e6e18b7677a63316f3ff54a16533dc28f < c8f292322ff16b9a2272a67de396c09a50e09dce, >= 49499c3e6e18b7677a63316f3ff54a16533dc28f < fd94d9dadee58e09b49075240fe83423eb1dcd36, >= 4.1, >= 4.1 < 5.10.198, >= 5.11 < 5.15.132, >= 5.16 < 6.1.54, >= 6.2 < 6.5.4
Fixed versions
5.10.198, 5.15.132, 6.1.54, 6.5.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-787