CVE-2026-89515

UNRATEDCVSS · not yet scoredTrending — 3 sources updated this week
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 11, 2026

Last Modified

September 14, 2026

References (8)

Vendor Advisories for CVE-2026-89515(1)

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
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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 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
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Data Freshness Timeline

(refreshed 12× in last 7d / 43× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-12 14:48 UTCEG score recompute
  4. 2026-10-11 19:15 UTCEG score recompute
  5. 2026-10-11 16:32 UTCEG score recompute
  6. 2026-10-11 13:47 UTCEG score recompute
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-10 17:54 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-07 19:55 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-04 22:08 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  17. 2026-10-02 00:21 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  18. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-29 02:32 UTCEG score recompute
  21. 2026-09-29 02:32 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  22. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-09-26 04:45 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
Show 23 more
  1. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-09-23 06:53 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  4. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-09-20 09:07 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  8. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-09-17 11:20 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  11. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-09-14 13:33 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  15. 2026-09-14 13:27 UTCNVD update
  16. 2026-09-14 12:30 UTCEG score recompute
  17. 2026-09-14 12:30 UTCGHSA enrichmentGHSA-c4r4-q33m-rp34
  18. 2026-09-14 12:24 UTCMITRE cvelistV5
  19. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-11 20:36 UTCNVD update
  22. 2026-09-11 19:51 UTCEG score recompute
  23. 2026-09-11 19:49 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-89515?
CVE-2026-89515 is a vulnerability whose severity is not yet rated; its CVE record was published on September 11, 2026. In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fill in DMA padding bytes in scsiallocsgtables() During fuzz testing, the following issue was discovered: BUG: KMSAN: uninit-value in dmamapsg_attrs+0x217/0x310 dmamapsg_attrs+0x217/0x310 dmamapsg_attrs+0x4a/0x70…
When was the CVE record for CVE-2026-89515 published?
The CVE record for CVE-2026-89515 was published on September 11, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 14, 2026; the record at its source may have been updated since.
Is CVE-2026-89515 actively exploited?
CVE-2026-89515 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-89515?
A fix for CVE-2026-89515 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-89515 are linked in the Vendor Advisories panel on this page.

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