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CVE-2026-68149— fs: preserve ACL_DONT_CACHE state in forget_cached_acl()

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.18% · P7

Possible ATT&CK Techniques 1AI

T1542.001 · System Firmware

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinuxfacd61053cff100973921d4d45d47cf53c747ec6< b98fad81f1202b0eb26aacf3ff4cc7a21ed3b5bfaffected
facd61053cff100973921d4d45d47cf53c747ec6< 834ddf899484a2f23129080e8773bc04f4691d07affected
facd61053cff100973921d4d45d47cf53c747ec6< a019b074903b3ad0a9726087efd0e8291452023baffected
facd61053cff100973921d4d45d47cf53c747ec6< ca03a7984a34f48085fd013e0d2cf4e6420b4acfaffected
facd61053cff100973921d4d45d47cf53c747ec6< 4b9a5458d02e214ef2b384124ca626e3e381d778affected
6.2affected
< 6.2unaffected
6.6.148≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-68149

Vulnerability Information
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Vulnerability Title
fs: preserve ACL_DONT_CACHE state in forget_cached_acl()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs: preserve ACL_DONT_CACHE state in forget_cached_acl() The ACL_DONT_CACHE state is meant to be a constant state for the inode for filesystems that want to opt out of posix acl caching. Commit facd61053cff1 ("fuse: fixes after adapting to new posix acl api") used this facility to opt out of posix acl caching for fuse inodes with fuse server that does not negotiate FUSE_POSIX_ACL (fc->posix_acl). The commit also takes care to gate the forget_all_cached_acls() call in fuse_set_acl() on fc->posix_acl because there is no need for it, but there are other placed in fuse code which call forget_all_cached_acls() unconditional to fc->posix_acl and those cause the loss of the ACL_DONT_CACHE state. This is not only a functional bug. Properly timed, a get_acl() from this fuse filesystem can return a stale cached value, as was observed in tests, because set_acl() does not invalidate the unintentional acl cache. We could fix this in fuse, but it actually makes no sense for the vfs helper forget_cached_acl() to invalidate the ACL_DONT_CACHE state, so let it not do that to fix fuse and future users of ACL_DONT_CACHE.
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 6.2版本存在安全漏洞，该漏洞源于forget_cached_acl()函数未保留ACL_DONT_CACHE状态，可能导致fuse文件系统返回过期的ACL缓存值。
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 facd61053cff100973921d4d45d47cf53c747ec6 ~ b98fad81f1202b0eb26aacf3ff4cc7a21ed3b5bf -
LinuxLinux 6.2 -

II. Public POCs for CVE-2026-68149

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III. Intelligence Information for CVE-2026-68149

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Patches & Fixes for CVE-2026-68149 (5)

Same Patch Batch · Linux · 2026-08-10 · 345 CVEs total

CVE-2026-68311wifi: mt76: mt7925: guard link STA in decap offload
CVE-2026-68321net: txgbe: fix FDIR filter leak on remove
CVE-2026-68320sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid
CVE-2026-68319pds_core: fix deadlock between reset thread and remove
CVE-2026-68318pds_core: fix use-after-free on workqueue during remove
CVE-2026-68317pds_core: fix auxiliary device add/del races
CVE-2026-68316accel: ethosu: Fix element size accounting for cmd stream validation
CVE-2026-68315sctp: validate stream count in sctp_process_strreset_inreq()
CVE-2026-68314net: mctp i3c: clean up notifier and buses if driver register fails
CVE-2026-68313tipc: fix infinite loop in __tipc_nl_compat_dumpit
CVE-2026-68312cifs: fix cifsFileInfo leak on kmalloc failure in deferred close drain paths
CVE-2026-68306wifi: mt76: mt7996: fix possible NULL-pointer deref in mt7996_mcu_sta_bfer_eht()
CVE-2026-68301net: hsr: fix memory leak on slave unregistration by removing synced VLANs
CVE-2026-68302amt: re-read skb header pointers after every pull
CVE-2026-68303drm/vc4: hvs/v3d: Fix null dereference in unbind
CVE-2026-68304wifi: brcmfmac: fix 802.1X-SHA256 call trace warning
CVE-2026-68305drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers
CVE-2026-68308wifi: mt76: mt7996: check pointer returned by mt76_connac_get_he_phy_cap()
CVE-2026-68310wifi: mt76: mt7915: guard HE capability lookups
CVE-2026-68309wifi: mt76: connac: fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv()

Showing top 20 of 345 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68149

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