smb: client: fix memory leak in cifs_construct_tcon()
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix memory leak in cifs_construct_tcon() When having a multiuser mount with domain= specified and using cifscreds, cifs_set_cifscreds() will end up setting @ctx->domainname, so it needs to be freed before leaving cifs_construct_tcon(). This fixes the following memory leak reported by kmemleak: mount.cifs //srv/share /mnt -o domain=ZELDA,multiuser,... su - testuser cifscreds add -d ZELDA -u testuser ... ls /mnt/1 ... umount /mnt echo scan > /sys/kernel/debug/kmemleak cat /sys/kernel/debug/kmemleak unreferenced object 0xffff8881203c3f08 (size 8): comm "ls", pid 5060, jiffies 4307222943 hex dump (first 8 bytes): 5a 45 4c 44 41 00 cc cc ZELDA... backtrace (crc d109a8cf): __kmalloc_node_track_caller_noprof+0x572/0x710 kstrdup+0x3a/0x70 cifs_sb_tlink+0x1209/0x1770 [cifs] cifs_get_fattr+0xe1/0xf50 [cifs] cifs_get_inode_info+0xb5/0x240 [cifs] cifs_revalidate_dentry_attr+0x2d1/0x470 [cifs] cifs_getattr+0x28e/0x450 [cifs] vfs_getattr_nosec+0x126/0x180 vfs_statx+0xf6/0x220 do_statx+0xab/0x110 __x64_sys_statx+0xd5/0x130 do_syscall_64+0xbb/0x380 entry_SYSCALL_64_after_hwframe+0x77/0x7f
- Published
- Dec 16, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 10th percentile
- CWE
- —
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Report tools
Action score
0
Monitor
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
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Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 1456d3cea31114137fabf1110d20a2e2c6d6060f, 16764d7486d02b1699ae16e91d7a577602398b17, 904847402bd74a28164bd4d8da082d1eace7c190, 325fa2a6729b74b2806b31725940cb54658515e5, 8db988a982908b7bff76e095000adabf9c29698b, 5.3affected
- f2aee329a68f5a907bcff11a109dfe17c0b41aeb and later · before ff8f9bd1c46ee02d5558293915d42e82646d5ee9affected · git
- f2aee329a68f5a907bcff11a109dfe17c0b41aeb and later · before d146e96fef876492979658dce644305de35878d4affected · git
- f2aee329a68f5a907bcff11a109dfe17c0b41aeb and later · before 3dd546e867e94c2f954bca45a961b6104ba708b6affected · git
- f2aee329a68f5a907bcff11a109dfe17c0b41aeb and later · before f62ffdfb431bdfa4b6d24233b7fd830eca0b801eaffected · git
- f2aee329a68f5a907bcff11a109dfe17c0b41aeb and later · before f15288c137d960836277d0e3ecc62de68e52f00faffected · git
- f2aee329a68f5a907bcff11a109dfe17c0b41aeb and later · before a67e91d5f446e455dd9201cdd6e865f7078d251daffected · git
- f2aee329a68f5a907bcff11a109dfe17c0b41aeb and later · before 3184b6a5a24ec9ee74087b2a550476f386df7dc2affected · git
- 4.4.194 and later · before 4.5affected · semver
- 4.9.194 and later · before 4.10affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.159-1 | 6.1.159-1 |
| Debian:13 | linux | before 6.12.63-1 | 6.12.63-1 |
| Debian:14 | linux | before 6.17.11-1 | 6.17.11-1 |
| openSUSE:Leap 16.0 | dtb-aarch64 | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-64kb | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-azure | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-default | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-default-base | before 6.12.0-160000.27.1.160000.2.8 | 6.12.0-160000.27.1.160000.2.8 |
| openSUSE:Leap 16.0 | kernel-docs | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-kvmsmall | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-obs-build | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-obs-qa | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-rt | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-source | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-syms | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| openSUSE:Leap 16.0 | kernel-zfcpdump | before 6.12.0-160000.27.1 | 6.12.0-160000.27.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_10 | before 1-150700.15.3.1 | 1-150700.15.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_10 | before 1-150700.1.3.1 | 1-150700.1.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-64kb | before 6.4.0-150700.53.34.1 | 6.4.0-150700.53.34.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default | before 6.4.0-150700.53.34.1 | 6.4.0-150700.53.34.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default-base | before 6.4.0-150700.53.34.1.150700.17.23.1 | 6.4.0-150700.53.34.1.150700.17.23.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-source | before 6.4.0-150700.53.34.1 | 6.4.0-150700.53.34.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-zfcpdump | before 6.4.0-150700.53.34.1 | 6.4.0-150700.53.34.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-docs | before 6.4.0-150700.53.34.1 | 6.4.0-150700.53.34.1 |
+22
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation40Plan
- CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment40Plan
- CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()40Plan
- CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler40Plan
- CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index40Plan
- CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 3184b6a5a24ec9ee74087b2a550476f386df7dc2 | Vendor (CNA) |
| Linux Linux | 3dd546e867e94c2f954bca45a961b6104ba708b6 | Vendor (CNA) |
| Linux Linux | 4.10 | Vendor (CNA) |
| Linux Linux | 4.15 | Vendor (CNA) |
| Linux Linux | 4.20 | Vendor (CNA) |
| Linux Linux | 4.5 | Vendor (CNA) |
| Linux Linux | 5.3 | Vendor (CNA) |
| Linux Linux | a67e91d5f446e455dd9201cdd6e865f7078d251d | Vendor (CNA) |
| Linux Linux | d146e96fef876492979658dce644305de35878d4 | Vendor (CNA) |
| Linux Linux | f15288c137d960836277d0e3ecc62de68e52f00f | Vendor (CNA) |
| Linux Linux | f62ffdfb431bdfa4b6d24233b7fd830eca0b801e | Vendor (CNA) |
| Linux Linux | ff8f9bd1c46ee02d5558293915d42e82646d5ee9 | Vendor (CNA) |
| debian:linux | 6.1.159-1 · Debian:12 | Package registry (OSV) |
| opensuse:dtb-aarch64 | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-64kb | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-azure | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-default | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-default-base | 6.12.0-160000.27.1.160000.2.8 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-docs | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-obs-build | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-rt | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-source | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-syms | 6.12.0-160000.27.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| suse:kernel-64kb | 6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-default | 6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-150700.53.34.1.150700.17.23.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-docs | 6.4.0-150700.53.34.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP7-RT_Update_10 | 1-150700.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP7 | Package registry (OSV) |
+7
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
No CVSS vector for this record, so attack conditions can't be derived.
Weakness class (CWE)
—
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/3184b6a5a24ec9ee74087b2a550476f386df7dc2
- git.kernel.org/stable/c/3dd546e867e94c2f954bca45a961b6104ba708b6
- git.kernel.org/stable/c/a67e91d5f446e455dd9201cdd6e865f7078d251d
- git.kernel.org/stable/c/d146e96fef876492979658dce644305de35878d4
- git.kernel.org/stable/c/f15288c137d960836277d0e3ecc62de68e52f00f
- git.kernel.org/stable/c/f62ffdfb431bdfa4b6d24233b7fd830eca0b801e
- git.kernel.org/stable/c/ff8f9bd1c46ee02d5558293915d42e82646d5ee9
Vendor advisories and official records. Exploit/PoC links are deliberately left out.