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Use of Uninitialized Resource The advisory has been revoked - it doesn't affect any version of package kernel-rt-kvm  (opens in a new tab)

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EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-RHEL10-KERNELRTKVM-22125631
  • published2 Nov 2026
  • disclosed4 Sept 2026
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Introduced: 4 Sep 2026

CVE-2026-80761  (opens in a new tab)
CWE-908  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by RHEL.

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

Bluetooth: ISO: zero the sockaddr before returning it in getname

iso_sock_getname() fills a struct sockaddr_iso in place and returns its size without clearing it first, so bytes it does not write are copied to user space from the kernel stack. The getsockname(2) and getpeername(2) paths both run through do_getsockname(), which hands getname() an uninitialized sockaddr_storage on the stack and copies back up to the number of bytes getname() returns, so the driver has to initialize every byte it accounts for.

Two ranges are left uninitialized:

  • struct sockaddr_iso is 10 bytes but only 9 are written (family, iso_bdaddr, iso_bdaddr_type), leaking the trailing pad byte on every call.

  • for a broadcast peer (BIS_LINK or PA_LINK) the returned length grows by sizeof(struct sockaddr_iso_bc), but only bc_sid, bc_num_bis and bc_bis are filled; bc_bdaddr and bc_bdaddr_type, the first 7 bytes of that structure, are never written.

An unprivileged process can open a BTPROTO_ISO socket and reach the pad leak with getsockname(); the broadcast leak needs an established BIS/PA connection. l2cap and rfcomm already memset their sockaddr in getname for the same reason; do the same here.