CVE-2026-80863

UNRATEDCVSS · not yet scored

Also known asEUVD-2026-71313 (ENISA EUVD) · GHSA-h28p-6hx4-vcc6 (GitHub Security Advisories)Source: ENISA EUVD

—
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:

RDMA/rxe: Fix OOB in free_rd_atomic_resources()

free_rd_atomic_resources() iterates using qp->attr.max_dest_rd_atomic. Updating max_dest_rd_atomic before freeing the old array can make the free path walk past the old allocation and trigger a slab out-of-bounds write catched by KASAN: ================================================================== BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline] BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline] BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline] BUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712 Write of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063

CPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full) Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xf7/0x600 mm/kasan/report.c:482 kasan_report+0xe4/0x120 mm/kasan/report.c:595 free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline] free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline] free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline] rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712 rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623 ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932 ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958 ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680 vfs_write+0x2aa/0x1070 fs/read_write.c:686 ksys_write+0x1f8/0x250 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fefc75a70cd Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd RDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007 RBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0

Allocated by task 11063: kasan_save_stack+0x33/0x60 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5296 [inline] __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline] rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714 rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623 ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932 ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958 ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma ---truncated---

CVSS v3
—
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
—
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the BOD 26-04 block below.

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.

The score's inputs: 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 4, 2026

Last Modified

October 19, 2026

References (9)

Vendor Advisories for CVE-2026-80863(13)

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

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-570.147.1.el9_62026-10-08redhat
redhatkernel-0:4.18.0-305.211.1.el8_42026-10-07redhat
redhatkernel-0:4.18.0-372.220.1.el8_62026-10-07redhat
redhatkernel-0:4.18.0-477.172.1.el8_82026-10-07redhat
redhatkernel-0:5.14.0-427.154.1.el9_42026-10-07redhat
linuxKernel @ 5.10.269 (fixes >=4.9.0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
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 ... 7.1~rc7-1~exp1 (172 versions)
  • every version up to 7.1.13-1: fixed in 7.1.13-1
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Data Freshness Timeline

(refreshed 8× in last 7d / 47× 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.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 92 are merged into the row they repeat.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-10-28 07:55 UTCOSV refresh
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-25 13:59 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-19 09:25 UTCNVD update
  18. 2026-10-19 09:23 UTCEG score recompute
  19. 2026-10-19 09:23 UTCVendor advisory
  20. 2026-10-19 09:23 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  21. 2026-10-19 08:58 UTCMITRE cvelistV5
  22. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-18 03:09 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 65 more
  1. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-10-12 14:57 UTCEG score recompute
  6. 2026-10-11 19:21 UTCEG score recompute
  7. 2026-10-11 16:37 UTCEG score recompute
  8. 2026-10-11 13:55 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-09 23:08 UTCVendor advisory
  12. 2026-10-09 23:08 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-06 23:04 UTCVendor advisory
  17. 2026-10-06 23:04 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-10-04 00:57 UTCVendor advisory
  22. 2026-10-04 00:57 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  23. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-10-01 00:53 UTCEG score recompute
  27. 2026-10-01 00:53 UTCVendor advisory
  28. 2026-10-01 00:53 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  29. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  30. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  31. 2026-09-28 01:31 UTCVendor advisory
  32. 2026-09-28 01:31 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  33. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  34. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  35. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  36. 2026-09-25 03:24 UTCVendor advisory
  37. 2026-09-25 03:24 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  38. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  39. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  40. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  41. 2026-09-22 05:16 UTCVendor advisory
  42. 2026-09-22 05:16 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  43. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  44. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  45. 2026-09-19 07:09 UTCVendor advisory
  46. 2026-09-19 07:09 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  47. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  48. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  49. 2026-09-16 09:01 UTCVendor advisory
  50. 2026-09-16 09:01 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  51. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  52. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  53. 2026-09-13 10:53 UTCVendor advisory
  54. 2026-09-13 10:53 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  55. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  56. 2026-09-10 12:45 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  57. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  58. 2026-09-07 14:38 UTCEG score recompute
  59. 2026-09-07 14:38 UTCVendor advisory
  60. 2026-09-07 14:37 UTCGHSA enrichmentGHSA-h28p-6hx4-vcc6
  61. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  62. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  63. 2026-09-04 16:22 UTCNVD update
  64. 2026-09-04 16:05 UTCEG score recompute
  65. 2026-09-04 16:04 UTCMITRE cvelistV5first tracked

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Frequently asked(4)

What is CVE-2026-80863?
CVE-2026-80863 is a vulnerability whose severity is not yet rated; its CVE record was published on September 4, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix OOB in free_rd_atomic_resources() free_rd_atomic_resources() iterates using qp->attr.max_dest_rd_atomic. Updating max_dest_rd_atomic before freeing the old array can make the free path walk past the old allocation and…
When was the CVE record for CVE-2026-80863 published?
The CVE record for CVE-2026-80863 was published on September 4, 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 October 19, 2026; the record at its source may have been updated since.
Is CVE-2026-80863 actively exploited?
CVE-2026-80863 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-80863?
A fix for CVE-2026-80863 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-80863 are linked in the Vendor Advisories panel on this page.

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