Linux Kernel up to 7.1.4 tipc tipc_update_nametbl memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.47+

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.4. It has been classified as critical. Impacted is the function tipc_update_nametbl of the component tipc. This manipulation causes memory corruption. This vulnerability is handled as CVE-2026-74281. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.1.4. Affected by this vulnerability is the function tipc_update_nametbl of the component tipc. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: tipc: reject inverted service ranges from peer bindings tipc_update_nametbl() inserts a binding advertised by a peer node using the lower and upper service-range bounds taken directly from the wire, without checking that lower <= upper. The local bind path validates the ordering (tipc_uaddr_valid()), but the name-distribution path does not. A binding with lower > upper is inserted at the far end of the service-range rbtree (keyed on lower) where no lookup or withdrawal can ever match it (service_range_foreach_match() requires sr->lower <= end). The publication, its service_range node and the augmented rbtree entry are then leaked for the lifetime of the namespace, and there is no per-peer cap equivalent to TIPC_MAX_PUBL on locally created bindings. Reject inverted ranges in the network path as well. A peer node can otherwise leak unbounded binding-table memory by sending PUBLICATION items with lower > upper.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-74281 since 08/15/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/15/2026).

Upgrading to version 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch cd1955f81bd8ebeef51b324989ac871ad1947fb6/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b/f1715d92ee3095d9215b493a8603a81f646fcf61/581ef56e5c34d475056ce086dc2ba0e872ba6857/7e401233f9bb74a626e70698d0d62f3a94ac0676/973bf0ed896b9898668dbadb82ed849d7d573010/2afb648f7b99216c687db1f89739c995e1144153 is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.212/6.1.178/6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: cd1955f81bd8ebeef51b324989ac871ad1947fb6/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b/f1715d92ee3095d9215b493a8603a81f646fcf61/581ef56e5c34d475056ce086dc2ba0e872ba6857/7e401233f9bb74a626e70698d0d62f3a94ac0676/973bf0ed896b9898668dbadb82ed849d7d573010/2afb648f7b99216c687db1f89739c995e1144153

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74281 (🔒)
GCVE (CVE): GCVE-0-2026-74281
GCVE (VulDB): GCVE-100-390241

Entryinfo

Created: 08/15/2026 08:49
Changes: 08/15/2026 08:49 (59)
Complete: 🔍
Cache ID: 216::103

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