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CVE-2026-80677— driver core: use READ_ONCE() for dev->driver in dev_has_sync_state()

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 5.6版本存在安全漏洞，该漏洞源于dev_has_sync_state()函数在未持有device_lock()的情况下重复读取dev->driver，可能导致并发unbind清除dev->driver时出现未定义行为。

CVSS 7.8 · High EPSS 0.18% · P7

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux ac338acf514e7b578fa9e3742ec2c292323b4c1a< 89789e4c141904506163dcb91c7289a074573931 affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a< 51b3e1de53ee5b7775c7ff90e67fdb2665fce938 affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a< 358697929351f619143f59c6a8a15a4994748b79 affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a< 5e79e0180515b31b2e2244dc3d256fd8b5a07021 affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a< 860885fcd2611bca8c28dac8b2c1c7ff160f763e affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a< cc77f0d91e3214e4292208f02a1dc09a31f9aac7 affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a< 9b0f4082a09760939588135d60a8e9cc994bfa3e affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a< e9506871a8ea304cde48ff4a57226df2aadddae3 affected
… +12 more rows
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I. Basic Information for CVE-2026-80677

Vulnerability Information
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Vulnerability Title
driver core: use READ_ONCE() for dev->driver in dev_has_sync_state()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: driver core: use READ_ONCE() for dev->driver in dev_has_sync_state() dev_has_sync_state() reads dev->driver twice without holding device_lock() -- once for the NULL check and once to dereference ->sync_state. Some callers only hold device_links_write_lock, which doesn't prevent a concurrent unbind from clearing dev->driver via device_unbind_cleanup(). Fix it by reading dev->driver exactly once with READ_ONCE(), pairing with the WRITE_ONCE() in device_set_driver().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 5.6版本存在安全漏洞，该漏洞源于dev_has_sync_state()函数在未持有device_lock()的情况下重复读取dev->driver，可能导致并发unbind清除dev->driver时出现未定义行为。
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 ac338acf514e7b578fa9e3742ec2c292323b4c1a ~ 89789e4c141904506163dcb91c7289a074573931 -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-80677

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III. Intelligence Information for CVE-2026-80677

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Patches & Fixes for CVE-2026-80677 (8)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80684 9.3 CRITICAL KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80721 8.8 HIGH Bluetooth: ISO: ensure no dangling hcon references in iso_conn
CVE-2026-80722 8.8 HIGH wifi: mac80211: validate individual TWT params before driver setup
CVE-2026-80724 8.8 HIGH ptp: vmclock: prevent read-only mappings from becoming writable

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80677

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