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CVE-2026-97583— afs: Clear stale peer app data after address list changes

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.

在 Linux 内核中，以下漏洞已得到修复： afs: 在地址列表变更后清除过期的对等节点应用数据 函数在持有 锁的情况下获取当前的端点状态，但未将 设置为 NULL。因此， 函数会将每一次地址列表的替换都视为初始设置，仅绑定新的对等节点（peers），而从未解绑已从旧列表中移除的对等节点。 因此，地址刷新过程可能发生如下情况：CPU 0 替换服务器 S 的地址列表，丢弃了旧的对等节点 Pold，但未清除 。随后，服务器销毁器仅清除了 S 当前的对等节点，并允许 S 进入 RCU 回调阶段。在回调完成并释放 S 之

CVSS 7.5 · High EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1135 · Network Share Discovery

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux 39ba6af83a7f9dee3e6a7916f41a48bcbda54eba< 3afb988fd0411707bdafb9b321086fff0da28aae affected
40e8b52fe8c8ab6920ea5f59c5469b6918cce624< c7f77a11a1e719192c7262aad38a3919aec62c21 affected
40e8b52fe8c8ab6920ea5f59c5469b6918cce624< 7f7f5589d048821dea316cbac9b37d27eaf7530e affected
40e8b52fe8c8ab6920ea5f59c5469b6918cce624< ba0623fc19a424f4745394c499f9f28a8d88d397 affected
6.12.101< 6.12.111 affected
6.15 affected
< 6.15 unaffected
6.12.111≤ 6.12.* unaffected
… +3 more rows
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I. Basic Information for CVE-2026-97583

Vulnerability Information
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Vulnerability Title
afs: Clear stale peer app data after address list changes
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: afs: Clear stale peer app data after address list changes afs_fs_probe_fileserver() fetches the current endpoint state under server->fs_lock, but leaves old_alist as NULL. Consequently, afs_set_peer_appdata() treats every address list replacement as initial setup and only binds the new peers; it never unbinds peers removed from the old list. An address refresh can therefore proceed as follows. CPU 0 replaces server S's list and drops Pold without clearing Pold->app_data. The server destroyer then clears only S's current peers and lets S reach its RCU callback. After the callback frees S, CPU 1 handles a callback through an RxRPC connection that still pins Pold, reads Pold->app_data, and calls afs_use_server() on the freed object. KASAN reported: BUG: KASAN: slab-use-after-free in afs_find_server+0x3c/0xa0 Read of size 4 at addr ffff8881013e1af0 by task krxrpcio/7001/74 Call Trace: afs_find_server+0x3c/0xa0 afs_rx_new_call+0x15c/0x390 rxrpc_new_incoming_call+0x97c/0x1730 rxrpc_input_packet.constprop.0+0xd03/0xec0 rxrpc_io_thread+0x967/0x1640 Allocated by task 93: afs_lookup_server+0x1a7/0x14c0 afs_alloc_server_list+0x43f/0xb60 afs_create_volume+0x923/0x1490 afs_get_tree+0x1c6/0x10a0 Freed by task 0: kfree+0x131/0x3c0 rcu_core+0x50a/0x1850 Last potentially related work creation: __call_rcu_common.constprop.0+0x71/0xa10 afs_put_server+0x213/0x2b0 Preserve old->addresses for the peer app-data update so that removed peers are cleared before the endpoint state is replaced. Also advance both cursors when the old and new lists share a peer; activating the old/new comparison without this would otherwise loop forever on the shared entry.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 39ba6af83a7f9dee3e6a7916f41a48bcbda54eba ~ 3afb988fd0411707bdafb9b321086fff0da28aae -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-97583

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III. Intelligence Information for CVE-2026-97583

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Patches & Fixes for CVE-2026-97583 (4)

Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total

CVE-2026-100075 9.8 CRITICAL RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters
CVE-2026-97957 8.8 HIGH net: hinic: fix mailbox segment buffer overflow
CVE-2026-97527 8.8 HIGH scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock
CVE-2026-97528 8.8 HIGH scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error
CVE-2026-97555 8.8 HIGH smb: client: fix heap overflow in DACL owner/group rewrite
CVE-2026-98115 8.8 HIGH ksmbd: safely drain sessions during logoff
CVE-2026-97525 8.2 HIGH x86/mm/pat: Allocate split page tables as kernel page tables
CVE-2026-98130 8.1 HIGH sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
CVE-2026-97573 8.1 HIGH bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()
CVE-2026-98069 8.1 HIGH net/rds: acquire the fastpath locks in rds_conn_shutdown()
CVE-2026-98070 8.1 HIGH net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
CVE-2026-97570 8.1 HIGH bnxt_en: Bound SW TPA IDs to prevent crashes
CVE-2026-97911 7.8 HIGH accel: ethosu: Ensure SRAM region size matches job
CVE-2026-98023 7.8 HIGH vxlan: reject dynamic fdb entries that reference a nexthop id
CVE-2026-97910 7.8 HIGH ASoC: sprd: validate compress buffer sizes against fixed allocations
CVE-2026-97584 7.8 HIGH afs: Fix incorrect free in candidate cleanup in afs_lookup_server()
CVE-2026-98143 7.8 HIGH accel: ethosu: Don't read the U65 rounding mode as a storage mode
CVE-2026-97903 7.8 HIGH exit: hold a reference to thread_pid across proc_flush_pid
CVE-2026-97548 7.8 HIGH xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions
CVE-2026-97594 7.8 HIGH landlock: Fix use-after-free of the source's parent directory

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-97583

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