Answer in brief
CVE-2026-46033 records a High severity (CVSS 7.1) vulnerability in crypto: authencesn - reject short ahash digests during instance creation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-46033 records a High severity (CVSS 7.1) vulnerability in crypto: authencesn - reject short ahash digests during instance creation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <77f59fb2d3aa33e90ec6cbbf45dcfb20ab82b1a9 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <2f31cd1e64a079c845bca31d2da7b3c90a311726 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <d4c6a6d08e70bb1083c7c405fc7faacbf19aebc0 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <b69933e97efea238ebbfcf70c2b1be1cd03f13e3 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <67f1f0933cc3d78dde222842bcad2778ec7a0b88 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <b42821c15445f93daea3e76ada682b2b7181c476 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <9aff81e8217e9de2929084b03b3c7f81988c112b || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <5db6ef9847717329f12c5ea8aba7e9f588a980c0 | 77f59fb2d3aa33e90ec6cbbf45dcfb20ab82b1a9, 2f31cd1e64a079c845bca31d2da7b3c90a311726, d4c6a6d08e70bb1083c7c405fc7faacbf19aebc0, b69933e97efea238ebbfcf70c2b1be1cd03f13e3, 67f1f0933cc3d78dde222842bcad2778ec7a0b88, b42821c15445f93daea3e76ada682b2b7181c476, 9aff81e8217e9de2929084b03b3c7f81988c112b, 5db6ef9847717329f12c5ea8aba7e9f588a980c0 |
| Linux/Linuxgeneric | 4.11 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - reject short ahash digests during instance creation authencesn requires either a zero authsize or an authsize of at least 4 bytes because the ESN encrypt/decrypt paths always move 4 bytes of high-order sequence number data at the end of the authenticated data. While crypto_authenc_esn_setauthsize() already rejects explicit non-zero authsizes in the range 1..3, crypto_authenc_esn_create() still copied auth->digestsize into inst->alg.maxauthsize without validating it. The AEAD core then initialized the tfm's default authsize from that value. As a result, selecting an ahash with digest size 1..3, such as cbcmac(cipher_null), exposed authencesn instances whose default authsize was invalid even though setauthsize() would have rejected the same value. AF_ALG could then trigger the ESN tail handling with a too-short tag and hit an out-of-bounds access. Reject authencesn instances whose ahash digest size is in the invalid non-zero range 1..3 so that no tfm can inherit an unsupported default authsize.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <77f59fb2d3aa33e90ec6cbbf45dcfb20ab82b1a9 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <2f31cd1e64a079c845bca31d2da7b3c90a311726 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <d4c6a6d08e70bb1083c7c405fc7faacbf19aebc0 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <b69933e97efea238ebbfcf70c2b1be1cd03f13e3 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <67f1f0933cc3d78dde222842bcad2778ec7a0b88 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <b42821c15445f93daea3e76ada682b2b7181c476 || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <9aff81e8217e9de2929084b03b3c7f81988c112b || >=f15f05b0a5de667c821a9727c33bce9d1d9b26dd <5db6ef9847717329f12c5ea8aba7e9f588a980c0 | 77f59fb2d3aa33e90ec6cbbf45dcfb20ab82b1a9, 2f31cd1e64a079c845bca31d2da7b3c90a311726, d4c6a6d08e70bb1083c7c405fc7faacbf19aebc0, b69933e97efea238ebbfcf70c2b1be1cd03f13e3, 67f1f0933cc3d78dde222842bcad2778ec7a0b88, b42821c15445f93daea3e76ada682b2b7181c476, 9aff81e8217e9de2929084b03b3c7f81988c112b, 5db6ef9847717329f12c5ea8aba7e9f588a980c0 |
| Linux/Linuxgeneric | 4.11 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - reject short ahash digests during instance creation authencesn requires either a zero authsize or an authsize of at least 4 bytes because the ESN encrypt/decrypt paths always move 4 bytes of high-order sequence number data at the end of the authenticated data. While crypto_authenc_esn_setauthsize() already rejects explicit non-zero authsizes in the range 1..3, crypto_authenc_esn_create() still copied auth->digestsize into inst->alg.maxauthsize without validating it. The AEAD core then initialized the tfm's default authsize from that value. As a result, selecting an ahash with digest size 1..3, such as cbcmac(cipher_null), exposed authencesn instances whose default authsize was invalid even though setauthsize() would have rejected the same value. AF_ALG could then trigger the ESN tail handling with a too-short tag and hit an out-of-bounds access. Reject authencesn instances whose ahash digest size is in the invalid non-zero range 1..3 so that no tfm can inherit an unsupported default authsize.
Quoted source text, attributed separately from HOL analysis.