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CVE-2026-68198— wifi: ath6kl: fix use-after-free in aggr_reset_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存在安全漏洞，该漏洞源于aggr_reset_state函数使用非同步timer_delete处理聚合定时器，可能引发竞争条件，导致释放后重用。

CVSS 8.8 · High EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux bdcd81707973cf8aa9305337166f8ee842a050d4< a1bac650b2d6b1baab1f3e78e2e007a6e2948dde affected
bdcd81707973cf8aa9305337166f8ee842a050d4< 2132a6db05846dd2318857d00e0c1291f9e41b29 affected
bdcd81707973cf8aa9305337166f8ee842a050d4< 17ff29cd8dbc977c97788a5f7c011ec807b58242 affected
bdcd81707973cf8aa9305337166f8ee842a050d4< 64af6534a085f49d6ed33338a19ab9cf0d0523c9 affected
bdcd81707973cf8aa9305337166f8ee842a050d4< b5d618fd61b9069b4c0a6b487022dd3117ad5acc affected
bdcd81707973cf8aa9305337166f8ee842a050d4< 18965470d41e69d3fc10eb62afae29d10f4cdfd1 affected
bdcd81707973cf8aa9305337166f8ee842a050d4< a3313111b5d9046af60b370c93eec105b27380c1 affected
bdcd81707973cf8aa9305337166f8ee842a050d4< ba7debb4dd6427386862220e8335a53a4bfc235d affected
… +10 more rows
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I. Basic Information for CVE-2026-68198

Vulnerability Information
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Vulnerability Title
wifi: ath6kl: fix use-after-free in aggr_reset_state()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix use-after-free in aggr_reset_state() The aggr_reset_state() function uses timer_delete() (non-synchronous) for the aggregation timer before proceeding to delete TID state and before the structure is freed by callers like aggr_module_destroy(). If the timer callback (aggr_timeout) is executing when aggr_reset_state() is called, the callback will continue to access aggr_conn fields like rx_tid[] and stat[] which may be freed immediately after by kfree(aggr_info->aggr_conn) in aggr_module_destroy(). Additionally, the timer callback can re-arm itself via mod_timer() while aggr_reset_state() is running, creating a more complex race condition. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/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存在安全漏洞，该漏洞源于aggr_reset_state函数使用非同步timer_delete处理聚合定时器，可能引发竞争条件，导致释放后重用。
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 bdcd81707973cf8aa9305337166f8ee842a050d4 ~ a1bac650b2d6b1baab1f3e78e2e007a6e2948dde -
Linux Linux 3.2 -

II. Public POCs for CVE-2026-68198

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III. Intelligence Information for CVE-2026-68198

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Patches & Fixes for CVE-2026-68198 (7)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68198

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