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CVE-2026-46033— crypto: authencesn - reject short ahash digests during instance creation

AI Predicted 7.8 Difficulty: Moderate EPSS 0.03% · P10

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxf15f05b0a5de667c821a9727c33bce9d1d9b26dd< 77f59fb2d3aa33e90ec6cbbf45dcfb20ab82b1a9affected
f15f05b0a5de667c821a9727c33bce9d1d9b26dd< 2f31cd1e64a079c845bca31d2da7b3c90a311726affected
f15f05b0a5de667c821a9727c33bce9d1d9b26dd< d4c6a6d08e70bb1083c7c405fc7faacbf19aebc0affected
f15f05b0a5de667c821a9727c33bce9d1d9b26dd< b69933e97efea238ebbfcf70c2b1be1cd03f13e3affected
f15f05b0a5de667c821a9727c33bce9d1d9b26dd< 67f1f0933cc3d78dde222842bcad2778ec7a0b88affected
f15f05b0a5de667c821a9727c33bce9d1d9b26dd< b42821c15445f93daea3e76ada682b2b7181c476affected
f15f05b0a5de667c821a9727c33bce9d1d9b26dd< 9aff81e8217e9de2929084b03b3c7f81988c112baffected
f15f05b0a5de667c821a9727c33bce9d1d9b26dd< 5db6ef9847717329f12c5ea8aba7e9f588a980c0affected
… +10 more rows
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I. Basic Information for CVE-2026-46033

Vulnerability Information
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Vulnerability Title
crypto: authencesn - reject short ahash digests during instance creation
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于authencesn实例创建时未验证ahash摘要长度，可能导致使用过短标签时触发越界访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux f15f05b0a5de667c821a9727c33bce9d1d9b26dd ~ 77f59fb2d3aa33e90ec6cbbf45dcfb20ab82b1a9 -
LinuxLinux 4.11 -

II. Public POCs for CVE-2026-46033

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III. Intelligence Information for CVE-2026-46033

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Patches & Fixes for CVE-2026-46033 (8)

Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total

CVE-2026-459729.8 CRITICALsmb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-458989.8 CRITICALRDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
CVE-2026-460439.1 CRITICALRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-459707.8 HIGHbonding: alb: fix UAF in rlb_arp_recv during bond up/down
CVE-2026-459807.8 HIGHaccel/amdxdna: Stop job scheduling across aie2_release_resource()
CVE-2026-459317.8 HIGHaccel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-460537.8 HIGHnet: rds: fix MR cleanup on copy error
CVE-2026-459297.8 HIGHovpn: fix possible use-after-free in ovpn_net_xmit
CVE-2026-458527.8 HIGHRDMA/rxe: Fix double free in rxe_srq_from_init
CVE-2026-458787.8 HIGHdrm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-460587.8 HIGHmedia: amphion: Fix race between m2m job_abort and device_run

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46033

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