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NVD / CVE Program· CNA Linux

CVE-2026-89515: scsi: core: Fill in DMA padding bytes in scsi_alloc_sgtables()

—No exploit Fix available

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 1aa6df61cef1f47f503c3ccf60d08c4dd931fdc1, 28ed5343666ff424ce5e248fa1c5a402303b4aff, 626147717bea776b61ed3631d2c26283760c4cc4.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1aa6df61cef1f47f503c3ccf60d08c4dd931fdc1, 28ed5343666ff424ce5e248fa1c5a402303b4aff, 626147717bea776b61ed3631d2c26283760c4cc4 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: scsi: core: Fill in DMA padding bytes in scsi_alloc_sgtables() During fuzz testing, the following issue was discovered: BUG: KMSAN: uninit-value in __dma_map_sg_attrs+0x217/0x310 __dma_map_sg_attrs+0x217/0x310 dma_map_sg_attrs+0x4a/0x70 ata_qc_issue+0x9f8/0x1420 __ata_scsi_queuecmd+0x1657/0x1740 ata_scsi_queuecmd+0x79a/0x920 scsi_queue_rq+0x4472/0x4f40 blk_mq_dispatch_rq_list+0x1cca/0x3ee0 __blk_mq_sched_dispatch_requests+0x458/0x630 blk_mq_sched_dispatch_requests+0x15b/0x340 __blk_mq_run_hw_queue+0xe5/0x250 __blk_mq_delay_run_hw_queue+0x138/0x780 blk_mq_run_hw_queue+0x4bb/0x7e0 blk_mq_sched_insert_request+0x2a7/0x4c0 blk_execute_rq+0x497/0x8a0 sg_io+0xbe0/0xe20 scsi_ioctl+0x2b36/0x3c60 sr_block_ioctl+0x319/0x440 blkdev_ioctl+0x80f/0xd70 __se_sys_ioctl+0x219/0x420 __x64_sys_ioctl+0x93/0xe0 x64_sys_call+0x1d6c/0x3ad0 do_syscall_64+0x4c/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Uninit was created at: __alloc_pages+0x5c0/0xc80 alloc_pages+0xe0e/0x1050 blk_rq_map_user_iov+0x2b77/0x6100 blk_rq_map_user_io+0x2fa/0x4d0 sg_io+0xad6/0xe20 scsi_ioctl+0x2b36/0x3c60 sr_block_ioctl+0x319/0x440 blkdev_ioctl+0x80f/0xd70 __se_sys_ioctl+0x219/0x420 __x64_sys_ioctl+0x93/0xe0 x64_sys_call+0x1d6c/0x3ad0 do_syscall_64+0x4c/0xa0 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Bytes 14-15 of 16 are uninitialized Memory access of size 16 starts at ffff88800cbdb000 When processing the last unaligned element of the scatterlist, it is supplemented with missing bytes in the amount of pad_len. These bytes remain uninitialized, which leads to a problem. Extend last_sg->length by pad_len first, then use sg_zero_buffer() to zero those pad_len bytes. sg_zero_buffer() uses sg_miter internally, which correctly handles sg entries spanning multiple pages and padding that crosses a page boundary. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Published
Sep 11, 2026
Updated
Oct 19, 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

    • 2.6.25affected
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before 1aa6df61cef1f47f503c3ccf60d08c4dd931fdc1affected · git
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before 6da140ebdfdd6aa3773945f2c0ebba01d2ef33d8affected · git
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before fd2cbe08c6ccba7fc1ddb830653a93bb7e2d833caffected · git
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before 28ed5343666ff424ce5e248fa1c5a402303b4affaffected · git
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before a4353ec7742bdf87dcdde5875270feb3a1982a51affected · git
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before e7143c3f4e5c0a7986733c6f27009274bf6c4264affected · git
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before 6fd1cce5018fdcc8d928e00a6a1dd2997d5b9409affected · git
    • 40b01b9bbdf51ae543a04744283bf2d56c4a6afa and later · before 626147717bea776b61ed3631d2c26283760c4cc4affected · git
    • before 2.6.25not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-89513Sep 11, 2026 · RISC-V: KVM: Fix PMU event info array size overflow
    35Monitor
  • ← EarlierCVE-2026-89514Sep 11, 2026 · scsi: fnic: Use GFP_ATOMIC for VLAN alloc under spinlock
    0Monitor
  • Later →CVE-2026-89516Sep 11, 2026 · sched_ext: Don't BUG_ON a destroyed DSQ in process_deferred_reenq_users
    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 Linux1aa6df61cef1f47f503c3ccf60d08c4dd931fdc1Vendor (CNA)
Linux Linux28ed5343666ff424ce5e248fa1c5a402303b4affVendor (CNA)
Linux Linux626147717bea776b61ed3631d2c26283760c4cc4Vendor (CNA)
Linux Linux6da140ebdfdd6aa3773945f2c0ebba01d2ef33d8Vendor (CNA)
Linux Linux6fd1cce5018fdcc8d928e00a6a1dd2997d5b9409Vendor (CNA)
Linux Linuxa4353ec7742bdf87dcdde5875270feb3a1982a51Vendor (CNA)
Linux Linuxe7143c3f4e5c0a7986733c6f27009274bf6c4264Vendor (CNA)
Linux Linuxfd2cbe08c6ccba7fc1ddb830653a93bb7e2d833cVendor (CNA)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package 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.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (7 more)

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

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