7.5

CVE-2026-52981

neigh: let neigh_xmit take skb ownership

In the Linux kernel, the following vulnerability has been resolved:

neigh: let neigh_xmit take skb ownership

neigh_xmit always releases the skb, except when no neighbour table is
found. But even the first added user of neigh_xmit (mpls) relied on
neigh_xmit to release the skb (or queue it for tx).

sashiko reported:
 If neigh_xmit() is called with an uninitialized neighbor table (for
 example, NEIGH_ND_TABLE when IPv6 is disabled), it returns -EAFNOSUPPORT
 and bypasses its internal out_kfree_skb error path.  Because the return
 value of neigh_xmit() is ignored here, does this leak the SKB?

Assume full ownership and remove the last code path that doesn't
xmit or free skb.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.1 < 6.1.175
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.141
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.91
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.33
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.10
Linux ≫ Linux Kernel Version7.1 Updaterc1
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.53% 0.417
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://git.kernel.org/stable/c/8a89054a1ec0767aec25ed2bbac933da6ba3cf5a
Patch
https://git.kernel.org/stable/c/9247d59ca15bf60a57dca08103f055d8a4340877
Patch
https://git.kernel.org/stable/c/0084712e0bee204b284510cdb63182fd5a30c2b7
Patch
https://git.kernel.org/stable/c/63063ba60d2dc334e34f1e3f9271d7f3f6f30307
Patch
https://git.kernel.org/stable/c/445e45a2c3a078316a62d2d331a570cf34ef5079
Patch
https://git.kernel.org/stable/c/4438113be604ee67a7bf4f81da6e1cca41332ce4
Patch