CVE-2026-97562

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-25. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

In the Linux kernel, the following vulnerability has been resolved:

smb: client: pin DFS superblock in iterator callback

tcon_super_cb() stores a raw superblock pointer, but __cifs_get_super() takes its active reference only after iterate_supers_type() has dropped s_umount and its passive reference. Concurrent DFS automount expiry can therefore free the superblock before cifs_sb_active() uses it.

A deterministic KASAN test reproduces the race as:

BUG: KASAN: slab-use-after-free in cifs_sb_active+0x77/0x80

The same test passes with this change applied.

Take the active reference in the callback while iterate_supers_type() still holds s_umount shared. cifs_put_tcp_super() remains the matching release.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
38
EG Risk 38/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

October 3, 2026

Advisory Details (4)

Auto-updated Sep 25, 2026
No patch confirmed yet.
generic

smb: client: pin DFS superblock in iterator callback - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d806d5a85dcbe2a0f181b2f0f9f61ddfbefa1818
generic

smb: client: pin DFS superblock in iterator callback - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5b01a8c0209690db75341528ec53fd87e0ac1460
generic

smb: client: pin DFS superblock in iterator callback - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a6b6561522212af852c9ad8a7dca8d59ef2c7377
generic

smb: client: pin DFS superblock in iterator callback - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ea43a15cea36dc5ddd832be5bddeac7dd804cbcf

Vendor Advisories for CVE-2026-97562(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (180 versions)
  • every version up to 7.2.7-1: fixed in 7.2.7-1
—

Data Freshness Timeline

(refreshed 41× in last 7d / 59× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 01:36 UTCEG score recompute
  2. 2026-10-05 01:36 UTCVendor advisory
  3. 2026-10-05 01:36 UTCGHSA enrichment
  4. 2026-10-04 23:23 UTCEPSS rescore
  5. 2026-10-04 12:54 UTCVendor advisory
  6. 2026-10-04 12:54 UTCGHSA enrichment
  7. 2026-10-04 00:10 UTCEG score recompute
  8. 2026-10-04 00:10 UTCVendor advisory
  9. 2026-10-04 00:10 UTCGHSA enrichment
  10. 2026-10-03 14:26 UTCEPSS rescore
  11. 2026-10-03 11:29 UTCVendor advisory
  12. 2026-10-03 11:29 UTCGHSA enrichment
  13. 2026-10-03 04:09 UTCEG score recompute
  14. 2026-10-03 04:09 UTCVendor advisory
  15. 2026-10-03 04:09 UTCGHSA enrichment
  16. 2026-10-02 17:57 UTCEPSS rescore
  17. 2026-10-02 15:27 UTCVendor advisory
  18. 2026-10-02 15:27 UTCGHSA enrichment
  19. 2026-10-02 02:46 UTCEG score recompute
  20. 2026-10-02 02:46 UTCVendor advisory
  21. 2026-10-02 02:45 UTCGHSA enrichment
  22. 2026-10-01 19:51 UTCEPSS rescore
  23. 2026-10-01 13:57 UTCVendor advisory
  24. 2026-10-01 13:57 UTCGHSA enrichment
  25. 2026-10-01 01:16 UTCEG score recompute
Show 34 more
  1. 2026-10-01 01:16 UTCVendor advisory
  2. 2026-10-01 01:15 UTCGHSA enrichment
  3. 2026-09-30 15:04 UTCEPSS rescore
  4. 2026-09-30 12:33 UTCVendor advisory
  5. 2026-09-30 12:33 UTCGHSA enrichment
  6. 2026-09-29 23:50 UTCEG score recompute
  7. 2026-09-29 23:50 UTCVendor advisory
  8. 2026-09-29 23:50 UTCGHSA enrichment
  9. 2026-09-29 08:19 UTCEG score recompute
  10. 2026-09-29 08:19 UTCVendor advisory
  11. 2026-09-29 08:19 UTCGHSA enrichment
  12. 2026-09-28 19:37 UTCEG score recompute
  13. 2026-09-28 19:37 UTCVendor advisory
  14. 2026-09-28 19:37 UTCGHSA enrichment
  15. 2026-09-28 13:52 UTCEPSS rescore
  16. 2026-09-28 13:52 UTCEPSS rescore
  17. 2026-09-28 06:54 UTCGHSA enrichment
  18. 2026-09-27 18:13 UTCEG score recompute
  19. 2026-09-27 18:13 UTCGHSA enrichment
  20. 2026-09-27 13:49 UTCEPSS rescore
  21. 2026-09-27 05:32 UTCGHSA enrichment
  22. 2026-09-26 16:48 UTCEG score recompute
  23. 2026-09-26 16:48 UTCGHSA enrichment
  24. 2026-09-26 15:59 UTCEPSS rescore
  25. 2026-09-26 04:07 UTCEG score recompute
  26. 2026-09-26 04:07 UTCGHSA enrichment
  27. 2026-09-25 15:26 UTCEG score recompute
  28. 2026-09-25 15:26 UTCGHSA enrichment
  29. 2026-09-25 14:52 UTCEG score recompute▲ 7.50
  30. 2026-09-25 14:52 UTCGHSA enrichment
  31. 2026-09-25 14:49 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  32. 2026-09-25 11:29 UTCNVD update
  33. 2026-09-25 10:40 UTCEG score recompute
  34. 2026-09-25 10:27 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-97562?
CVE-2026-97562 is a high vulnerability published on September 25, 2026. In the Linux kernel, the following vulnerability has been resolved: smb: client: pin DFS superblock in iterator callback tconsupercb() stores a raw superblock pointer, but cifsgetsuper() takes its active reference only after iteratesuperstype() has dropped s_umount and its passive reference.…
When was CVE-2026-97562 disclosed?
CVE-2026-97562 was first published on September 25, 2026, with the most recent update on October 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-97562 actively exploited?
CVE-2026-97562 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-97562?
CVE-2026-97562 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-97562?
No fix for CVE-2026-97562 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-97562 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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