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CVE-2023-54035

netfilter: nf_tables: fix underflow in chain reference counter

High7.8EPSS 0.14%
Published
Updated
Reserved
Assigned by
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix underflow in chain reference counter Set element addition error path decrements reference counter on chains twice: once on element release and again via nft_data_release(). Then, d6b478666ffa ("netfilter: nf_tables: fix underflow in object reference counter") incorrectly fixed this by removing the stateful object reference count decrement. Restore the stateful object decrement as in b91d90368837 ("netfilter: nf_tables: fix leaking object reference count") and let nft_data_release() decrement the chain reference counter, so this is done only once.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 7 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-54035, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Deferred3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.14% · top 96% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected 35651fde1a7bb54dde0a46d35cd0d7136869ae86 – < b068314fd8ce751a7f906e55bb90f3551815f1a0
    • affected 628bd3e49cba1c066228e23d71a852c23e26da73 – < 9c959671abc7d4ffdf34eed10c64492d43cb6a3c
    • affected 628bd3e49cba1c066228e23d71a852c23e26da73 – < b389139f12f287b8ed2e2628b72df89a081f0b59
    • affected bc9f791d2593f17e39f87c6e2b3a36549a3705b1
    • affected 3c7ec098e3b588434a8b07ea9b5b36f04cef1f50
    • affected a136b7942ad2a50de708f76ea299ccb45ac7a7f9
    • affected 25aa2ad37c2162be1c0bc4fe6397f7e4c13f00f8
    • affected d60be2da67d172aecf866302c91ea11533eca4d9
    • affected dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41
    • affected 4.19.316 – < 4.20
    • affected 5.4.262 – < 5.5
    • affected 5.10.188 – < 5.11
    • affected 5.15.121 – < 5.16
    • affected 6.3.10 – < 6.4

  • Linux · Linux

    • affected 6.4
    • unaffected < 6.4
    • unaffected 6.4.4 – ≤ 6.4.*
    • unaffected 6.5 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .