Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — mm, slub: do not call do_slab_free for kfence object
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0044 36.8 —
AFFECTED
Product Versions Fixed
Linux 782f8906f8057efc7151b4b98b0a0280a71d005f – —
Linux 6.8 – 6.10.5
TIMELINE
Aug 21 Reserved by Linux
Sep 4 Published (CNA: Linux)
Aug 4 RESCORED — CVE-2024-44973 (Linux). CVSS 8.1 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
mm, slub: do not call do_slab_free for kfence object
In 782f8906f805 the freeing of kfence objects was moved from deep
inside do_slab_free to the wrapper functions outside. This is a nice
change, but unfortunately it missed one spot in __kmem_cache_free_bulk.
This results in a crash like this:
BUG skbuff_head_cache (Tainted: G S B E ): Padding overwritten. 0xffff88907fea0f00-0xffff88907fea0fff @offset=3840
slab_err (mm/slub.c:1129)
free_to_partial_list (mm/slub.c:? mm/slub.c:4036)
slab_pad_check (mm/slub.c:864 mm/slub.c:1290)
check_slab (mm/slub.c:?)
free_to_partial_list (mm/slub.c:3171 mm/slub.c:4036)
kmem_cache_alloc_bulk (mm/slub.c:? mm/slub.c:4495 mm/slub.c:4586 mm/slub.c:4635)
napi_build_skb (net/core/skbuff.c:348 net/core/skbuff.c:527 net/core/skbuff.c:549)
All the other callers to do_slab_free appear to be ok.
Add a kfence_free check in __kmem_cache_free_bulk to avoid the crash.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| August 21, 2024 | Reserved | Reserved by Linux |
| September 4, 2024 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2024-44973 (Linux). CVSS 8.1 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | 782f8906f8057efc7151b4b98b0a0280a71d005f | — |
| Linux | Linux | — | 6.8 | 6.10.5 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-44973 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.