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CVE-2026-45843— slip: bound decode() reads against the compressed packet length

CVSS 8.2 · High EPSS 0.28% · P20

Possible ATT&CK Techniques 1AI

T1083 · File and Directory Discovery

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6268f01ae989013671b526c883e92655342c6f6faffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9aafba2f49e1fcccc2018816f5836a609c925879affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 335957df4ed60f02a2ec0432fbedbf0cc7241d8baffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 37537e42e6df387398bee85cb85070cc80bb1e10affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4cefe32639933d652614b0bd50f818f9af4af78faffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0511ecb00e61bf28e2fec4bb41fcce385c3a3b2daffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< d42bec6e4f6d6d658be365539400b3314b76b2a7affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7affected
… +10 more rows
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I. Basic Information for CVE-2026-45843

Vulnerability Information
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Vulnerability Title
slip: bound decode() reads against the compressed packet length
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: slip: bound decode() reads against the compressed packet length slhc_uncompress() parses a VJ-compressed TCP header by advancing a pointer through the packet via decode() and pull16(). Neither helper bounds-checks against isize, and decode() masks its return with & 0xffff so it can never return the -1 that callers test for -- those error paths are dead code. A short compressed frame whose change byte requests optional fields lets decode() read past the end of the packet. The over-read bytes are folded into the cached cstate and reflected into subsequent reconstructed packets. Make decode() and pull16() take the packet end pointer and return -1 when exhausted. Add a bounds check before the TCP-checksum read. The existing == -1 tests now do what they were always meant to.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
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slip模块中decode()和pull16()函数未对压缩包长度进行边界检查，可能导致越界读取。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 6268f01ae989013671b526c883e92655342c6f6f -
LinuxLinux 2.6.12 -

II. Public POCs for CVE-2026-45843

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III. Intelligence Information for CVE-2026-45843

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Patches & Fixes for CVE-2026-45843 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
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-2026-460399.8 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-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
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-2026-459567.8 HIGHdrm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
CVE-2026-458617.8 HIGHgfs2: Fix slab-use-after-free in qd_put
CVE-2026-460657.8 HIGHfbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-460367.8 HIGHvfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-459357.8 HIGHfs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
CVE-2026-459597.8 HIGHcrypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-459107.8 HIGHRDMA/rxe: Fix race condition in QP timer handlers
CVE-2026-458627.8 HIGHiommu/vt-d: Flush cache for PASID table before using it
CVE-2026-459097.8 HIGHclk: mediatek: Drop __initconst from gates

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45843

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