5.5

CVE-2026-23060: crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec

Modified
AliasesUBUNTU-CVE-2026-23060DEBIAN-CVE-2026-23060
Published 04-02-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-23060 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.18%
0%100%
Low · +0.03 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 52 · Related 54
DLA-4475-1DLA-4476-1DSA-6126-1DSA-6127-1MGASA-2026-0097MGASA-2026-0098

Timeline

  1. 04-02-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec authencesn assumes an ESP/ESN-formatted AAD. When assoclen is shorter than the minimum expected length, crypto_authenc_esn_decrypt() can advance past the end of the destination scatterlist and trigger a NULL pointer dereference in scatterwalk_map_and_copy(), leading to a kernel panic (DoS). Add a minimum AAD length check to fail fast on invalid inputs.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.14% 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.

Ubuntu156 products
  • linux< 4.4.0-279.313 | < 4.15.0-248.260 | < 5.4.0-228.248 | < 5.15.0-174.184 | < 6.8.0-107.107 | < 6.17.0-20.20
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1153.159 | < 4.4.0-1191.206 | < 4.15.0-1190.203 | < 5.4.0-1157.167 | < 5.15.0-1104.111 | < 6.8.0-1051.54 | < 6.17.0-1010.10
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 104880a6b470958ddc30e139c41aa4f6ed3a5234, < df22c9a65e9a9daa368a72fed596af9d7d5876bb | ≥ 104880a6b470958ddc30e139c41aa4f6ed3a5234, < fee86edf5803f1d1f19e3b4f2dacac241bddfa48 | ≥ 104880a6b470958ddc30e139c41aa4f6ed3a5234, < 767e8349f7e929b7dd95c08f0b4cb353459b365e | ≥ 104880a6b470958ddc30e139c41aa4f6ed3a5234, < b0a9609283a5c852addb513dafa655c61eebc1ef | ≥ 104880a6b470958ddc30e139c41aa4f6ed3a5234, < 161bdc90fce25bd9890adc67fa1c8563a7acbf40 | ≥ 104880a6b470958ddc30e139c41aa4f6ed3a5234, < 9532ff0d0e90ff78a214299f594ab9bac81defe4 | ≥ 104880a6b470958ddc30e139c41aa4f6ed3a5234, < 2397e9264676be7794f8f7f1e9763d90bd3c7335 | 4.3
  • linux_kernel≥ 4.3, < 5.10.249 | ≥ 5.11, < 5.15.199 | ≥ 5.16, < 6.1.162 | ≥ 6.2, < 6.6.122 | ≥ 6.7, < 6.12.68 | ≥ 6.13, < 6.18.8 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.8-1

3 vendors · 159 products

References

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