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CVE-2026-74370— liveupdate: fix TOCTOU race in luo_session_retrieve()

AI Predicted 4.4 Difficulty: Hard EPSS 0.15% · P5

Affected Version Matrix 6

VendorProductVersion RangeStatus
LinuxLinux0153094d03df5a2e834a19c59b255649a258ae46< d944170607b872a1f93713c555ad3f0efde3a9b8affected
0153094d03df5a2e834a19c59b255649a258ae46< d3ae9e7fddb4036f50003d7fa1ef52801fdb961baffected
6.19affected
< 6.19unaffected
7.1.5≤ 7.1.*unaffected
7.2≤ *unaffected
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I. Basic Information for CVE-2026-74370

Vulnerability Information
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Vulnerability Title
liveupdate: fix TOCTOU race in luo_session_retrieve()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: liveupdate: fix TOCTOU race in luo_session_retrieve() Extend the scope of the rwsem_read lock in luo_session_retrieve() to overlap with the acquisition of the session mutex. This prevents a concurrent thread from releasing and freeing the session between the lookup and the mutex lock.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 6.19版本存在安全漏洞，该漏洞源于luo_session_retrieve函数存在TOCTOU竞争条件，可能导致并发线程在查找和互斥锁之间释放会话。
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 0153094d03df5a2e834a19c59b255649a258ae46 ~ d944170607b872a1f93713c555ad3f0efde3a9b8 -
LinuxLinux 6.19 -

II. Public POCs for CVE-2026-74370

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III. Intelligence Information for CVE-2026-74370

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Patches & Fixes for CVE-2026-74370 (2)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-7430910.0 CRITICALvdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-7428010.0 CRITICALcrypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-7427910.0 CRITICALcrypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-7240710.0 CRITICALgeneve: validate inner network offset in geneve_gro_complete()
CVE-2026-7240810.0 CRITICALgeneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-7447510.0 CRITICALvxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-7242110.0 CRITICALipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-724939.9 CRITICALnet: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-743769.8 CRITICALmd/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-722349.8 CRITICALbatman-adv: access unicast_ttvn skb->data only after skb realloc
CVE-2026-723399.8 CRITICALqede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-742559.8 CRITICALtipc: fix UAF in tipc_l2_send_msg()
CVE-2026-720649.8 CRITICALnet: mana: Sync page pool RX frags for CPU
CVE-2026-720659.8 CRITICALnet: mana: Validate the packet length reported by the NIC
CVE-2026-722179.8 CRITICALSUNRPC: Bound-check xdr_buf_to_bvec() stores before writing
CVE-2026-744739.8 CRITICALvxlan: use pskb_network_may_pull() in route_shortcircuit()
CVE-2026-723239.8 CRITICALipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-744959.8 CRITICALigbvf: Fix leak in TX DMA error cleanup
CVE-2026-724639.8 CRITICALxfrm: Fix dev use-after-free in xfrm async resumption
CVE-2026-720699.8 CRITICALlocking/rt: Fix the incorrect RCU protection in rt_spin_unlock()

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74370

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