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CVE-2026-72374— afs: Fix callback service message parsers to pass through -EAGAIN

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 4.9版本存在安全漏洞，该漏洞源于AFS回调服务消息解析器在解析传入请求流时未正确传递-EAGAIN错误码而将其误置为0，可能导致回调通知解析异常。

CVSS 7.5 · High EPSS 0.72% · P51

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< 26b737b3769e92493fe94c34620399d93ca231ae affected
d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< 09c67a7ded481482155b836c8c7f078a3075f8de affected
d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< 239cd337c9d047e7097f5b2ebbb41ddfb8180bc6 affected
d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< 5a39b145a8fb49f316e7ec1f29ba51d68095c7e4 affected
d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< 772850871a2e772e26f9d93f1e9ddd413b3eeaa4 affected
d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< 0acbc09d2aca0432af45cec114f20d55ceafaec4 affected
d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< f14dd036fad3d359f26f1282199cec06b3a9362b affected
d001648ec7cf8b21ae9eec8b9ba4a18295adfb14< 0f36469d7ce98b362934113c550d08bb0c784231 affected
… +10 more rows
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I. Basic Information for CVE-2026-72374

Vulnerability Information
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Vulnerability Title
afs: Fix callback service message parsers to pass through -EAGAIN
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix callback service message parsers to pass through -EAGAIN The AFS filesystem client uses an rxrpc server to listen for callback notifications. Each callback call type handler has a delivery function that parses the incoming request stream, and this should return -EAGAIN the last packet hasn't yet been seen, but all currently queued received data is consumed. afs_extract_data() does this, but the -EAGAIN return is switched to 0 inadvertantly Fix callback service message parsers to pass through -EAGAIN
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 4.9版本存在安全漏洞，该漏洞源于AFS回调服务消息解析器在解析传入请求流时未正确传递-EAGAIN错误码而将其误置为0，可能导致回调通知解析异常。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux d001648ec7cf8b21ae9eec8b9ba4a18295adfb14 ~ 26b737b3769e92493fe94c34620399d93ca231ae -
Linux Linux 4.9 -

II. Public POCs for CVE-2026-72374

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III. Intelligence Information for CVE-2026-72374

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Patches & Fixes for CVE-2026-72374 (8)

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

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72221 9.8 CRITICAL sunrpc: wait for in-flight TLS handshake callback when cancel loses race
CVE-2026-72323 9.8 CRITICAL ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()
CVE-2026-72463 9.8 CRITICAL xfrm: Fix dev use-after-free in xfrm async resumption
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()
CVE-2026-74376 9.8 CRITICAL md/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-74255 9.8 CRITICAL tipc: fix UAF in tipc_l2_send_msg()
CVE-2026-72339 9.8 CRITICAL qede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-72234 9.8 CRITICAL batman-adv: access unicast_ttvn skb->data only after skb realloc
CVE-2026-74495 9.8 CRITICAL igbvf: Fix leak in TX DMA error cleanup
CVE-2026-72355 9.8 CRITICAL netfs: Fix barriering when walking subrequest list

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-2026-72374

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