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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-99132: xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 16468281da17263095bd1906cf2d16a972f10791, 41a28c865d1d5843f8cb9e0af17a8f4d9e2961ff, 45f124f3902bfae6a366d124db04f707264176fb; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 16468281da17263095bd1906cf2d16a972f10791, 41a28c865d1d5843f8cb9e0af17a8f4d9e2961ff, 45f124f3902bfae6a366d124db04f707264176fb; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes 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: xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf xfs_sync_sb_buf() holds sb/rtsb buffer locks across a synchronous xfs_trans_commit(), which flushes the CIL push workqueue internally. If shutdown occurs during the CIL push, xfs_buf_item_unpin() needs to lock these buffers to fail them, causing a deadlock: setlabel: holds buf lock -> flush_workqueue(xfs-cil) CIL push worker: xfs_buf_item_unpin -> xfs_buf_lock(same buf) Remove the xfs_trans_bhold() calls so that commit releases the buffer locks normally. After the sync commit, re-acquire the buffers via mp->m_sb_bp / mp->m_rtsb_bp for the on-disk writeback.

—No exploit Fix available
Published
Oct 28, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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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.

—

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

    • 4.18affected
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before 16468281da17263095bd1906cf2d16a972f10791affected · git
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before 45f124f3902bfae6a366d124db04f707264176fbaffected · git
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before d900946853c2d183fa0e199bae9ddbcd21795a18affected · git
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before 83b2e511cf9ba22904b167e00fcbd85169b50b2caffected · git
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before acd7f2f9b822b6e126f3e3c99c173e62aa315b6faffected · git
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before e5456dec79c71c8ef8f9f9adb77d320f113b34dbaffected · git
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before 6353e5cd8c43d6e805cacbfbfecf4103571a7ff8affected · git
    • f7664b31975bd893190708e76b2c424328f0c49b and later · before 41a28c865d1d5843f8cb9e0af17a8f4d9e2961ffaffected · git
    • before 4.18not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.115-26.12.115-2

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-99130Oct 28, 2026 · io_uring/cancel: don't spin on local work the task can't run
    0Monitor
  • ← EarlierCVE-2026-99131Oct 28, 2026 · xfs: fix capability check in xfs
    32Monitor
  • Later →CVE-2026-99133Oct 28, 2026 · net/iucv: fix the recvmsg window update
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux16468281da17263095bd1906cf2d16a972f10791Vendor (CNA)
Linux Linux41a28c865d1d5843f8cb9e0af17a8f4d9e2961ffVendor (CNA)
Linux Linux45f124f3902bfae6a366d124db04f707264176fbVendor (CNA)
Linux Linux6353e5cd8c43d6e805cacbfbfecf4103571a7ff8Vendor (CNA)
Linux Linux83b2e511cf9ba22904b167e00fcbd85169b50b2cVendor (CNA)
Linux Linuxacd7f2f9b822b6e126f3e3c99c173e62aa315b6fVendor (CNA)
Linux Linuxd900946853c2d183fa0e199bae9ddbcd21795a18Vendor (CNA)
Linux Linuxe5456dec79c71c8ef8f9f9adb77d320f113b34dbVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.115-2 · Debian:13Package 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.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 5, 2026+8 d
EPSS, last 120 days

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 researchers

Finders, 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records