CVE-2026-53026— NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 9
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c07dc84ed67c5a182273171639bacbbb87c12175< 4584229395d0d65bd517780afe97ffea07cb2c3d | affected |
8072e34e1387d03102b788677d491e2bcceef6f5< b81572b073441dfd32213e41857676d0dbff4665 | affected | ||
8072e34e1387d03102b788677d491e2bcceef6f5< b48f44f36e6607b2f818560f19deb86b4a9c717b | affected | ||
6.18.4< 6.18.33 | affected | ||
6.19 | affected | ||
< 6.19 | unaffected | ||
6.18.33≤ 6.18.* | unaffected | ||
7.0.10≤ 7.0.* | unaffected | ||
| … +1 more rows | |||
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I. Basic Information for CVE-2026-53026
Vulnerability Information
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Vulnerability Title
NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count since that was already done by the thread that added READ access to the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed. When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on __kmem_cache_shutdown. This problem can be reproduced by running the Git project's test suite over NFS.
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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于NFSD组件中nfs4_file访问计数问题，在nfsd4_add_rdaccess_to_wrdeleg函数中，当fp->fi_fds[O_RDONLY]已被另一线程设置时，重复调用__nfs4_file_get_access增加访问计数，可能导致对应的nfsd_file无法被释放，并在停止nfs-server服务时触发BUG。
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
II. Public POCs for CVE-2026-53026
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-53026 (3)
Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total
| CVE-2026-53049 | 9.8 CRITICAL | gfs2: add some missing log locking |
| CVE-2026-52993 | 9.8 CRITICAL | tipc: fix double-free in tipc_buf_append() |
| CVE-2026-52989 | 9.8 CRITICAL | nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers |
| CVE-2026-52986 | 9.8 CRITICAL | netfilter: nf_conntrack_sip: don't use simple_strtoul |
| CVE-2026-52982 | 9.8 CRITICAL | net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit() |
| CVE-2026-53002 | 9.8 CRITICAL | netfilter: conntrack: remove sprintf usage |
| CVE-2026-53086 | 9.8 CRITICAL | net: bcmgenet: fix racing timeout handler |
| CVE-2026-53045 | 9.8 CRITICAL | memory: tegra124-emc: Fix dll_change check |
| CVE-2026-53006 | 9.8 CRITICAL | ipv6: fix possible UAF in icmpv6_rcv() |
| CVE-2026-53046 | 9.8 CRITICAL | ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine |
| CVE-2026-52955 | 9.8 CRITICAL | libceph: Fix potential out-of-bounds access in crush_decode() |
| CVE-2026-53010 | 9.8 CRITICAL | ksmbd: fix use-after-free in smb2_open during durable reconnect |
| CVE-2026-53088 | 9.8 CRITICAL | net: bcmgenet: fix off-by-one in bcmgenet_put_txcb |
| CVE-2026-52924 | 9.8 CRITICAL | sctp: purge outqueue on stale COOKIE-ECHO handling |
| CVE-2026-52931 | 9.8 CRITICAL | batman-adv: tp_meter: avoid use of uninit sender vars |
| CVE-2026-53055 | 9.8 CRITICAL | crypto: hisilicon/sec2 - prevent req used-after-free for sec |
| CVE-2026-52914 | 9.8 CRITICAL | batman-adv: fix fragment reassembly length accounting |
| CVE-2026-52958 | 9.1 CRITICAL | libceph: Fix potential out-of-bounds access in osdmap_decode() |
| CVE-2026-53043 | 9.1 CRITICAL | ocfs2/dlm: validate qr_numregions in dlm_match_regions() |
| CVE-2026-52999 | 9.1 CRITICAL | netfilter: nfnetlink_osf: fix out-of-bounds read on option matching |
Showing top 20 of 219 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-64600
xfs: resample the data fork mapping after cycling ILOCK - CVE-2026-64206
Bluetooth: L2CAP: cancel pending_rx_work before taking conn- - CVE-2026-64207
net/sched: dualpi2: fix GSO backlog accounting - CVE-2026-64205
i2c: i801: fix hardware state machine corruption in error pa - CVE-2026-64192
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM i
Same vendor: Linux
- CVE-2026-64600
xfs: resample the data fork mapping after cycling ILOCK - CVE-2026-64206
Bluetooth: L2CAP: cancel pending_rx_work before taking conn- - CVE-2026-64207
net/sched: dualpi2: fix GSO backlog accounting - CVE-2026-64205
i2c: i801: fix hardware state machine corruption in error pa - CVE-2026-64192
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM i
V. Comments for CVE-2026-53026
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