NVD / CVE Program· CNA Linux

CVE-2026-52967: smb/client: fix possible infinite loop and oob read in symlink_data()

HighCVSS 8.1 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 32/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 1b9331b16b0ed9414dcf7583d8134bdfeb117aae, 1cfa2d59f669db28d6292d10ff87ca6837c781b0, 6.1; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1b9331b16b0ed9414dcf7583d8134bdfeb117aae, 1cfa2d59f669db28d6292d10ff87ca6837c781b0, 6.1; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix possible infinite loop and oob read in symlink_data() On 32-bit architectures, the infinite loop is as follows: len = p->ErrorDataLength == 0xfffffff8 u8 *next = p->ErrorContextData + len next == p On 32-bit architectures, the out-of-bounds read is as follows: len = p->ErrorDataLength == 0xfffffff0 u8 *next = p->ErrorContextData + len next == (u8 *)p - 8

Published: Jun 24, 2026
Updated: Oct 19, 2026
EPSS: 0.3% · 33th percentile
CWE: CWE-125

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 32 / 40 · 8.1 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Linux: 8.1; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

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
- 2d046892a493d9760c35fdaefc3017f27f91b621, 6.1affected
- 76894f3e2f71177747b8b4763fb180e800279585 and later · before 1cfa2d59f669db28d6292d10ff87ca6837c781b0affected · git
- 76894f3e2f71177747b8b4763fb180e800279585 and later · before b41598bf54b3fe528994e573df6008f8f4d0a4f4affected · git
- 76894f3e2f71177747b8b4763fb180e800279585 and later · before cd4b9b662f0fb9aa97ee6bf9034eca76fc6cab23affected · git
- 76894f3e2f71177747b8b4763fb180e800279585 and later · before 97a05b0ae9ea5ec052be2eef0f9cc7ce03501bbbaffected · git
- 76894f3e2f71177747b8b4763fb180e800279585 and later · before 1b9331b16b0ed9414dcf7583d8134bdfeb117aaeaffected · git
- 76894f3e2f71177747b8b4763fb180e800279585 and later · before 7d9a7f1f96cd617ee9e75bb22217c709038e26b8affected · git
- 6.0.16 and later · before 6.1affected · semver
- before 6.1not affected · semver
- 6.1.175 and later · up to and including 6.1.*not affected · semver

Affected versions · NVD (6)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel6.0.16 and later · before 6.1.175
linux linux kernel6.2 and later · before 6.6.141
linux linux kernel6.7 and later · before 6.12.91
linux linux kernel6.13 and later · before 6.18.33
linux linux kernel6.19 and later · before 7.0.10
linux linux kernel7.1

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 6.1.176-1	6.1.176-1
Debian:13	linux	before 6.12.94-1	6.12.94-1
Debian:14	linux	before 7.0.10-1	7.0.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2026-52965Jun 24, 2026 · drm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure
22Monitor
← EarlierCVE-2026-52966Jun 24, 2026 · drm: Replace old pointer to new idr
22Monitor
Later →CVE-2026-52968Jun 24, 2026 · KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic
28Monitor

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	1b9331b16b0ed9414dcf7583d8134bdfeb117aae	Vendor (CNA)
Linux Linux	1cfa2d59f669db28d6292d10ff87ca6837c781b0	Vendor (CNA)
Linux Linux	6.1	Vendor (CNA)
Linux Linux	7d9a7f1f96cd617ee9e75bb22217c709038e26b8	Vendor (CNA)
Linux Linux	97a05b0ae9ea5ec052be2eef0f9cc7ce03501bbb	Vendor (CNA)
Linux Linux	b41598bf54b3fe528994e573df6008f8f4d0a4f4	Vendor (CNA)
Linux Linux	cd4b9b662f0fb9aa97ee6bf9034eca76fc6cab23	Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.0	6.6.143.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.176-1 · Debian:12	Package registry (OSV)

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.