ixgbevf: fix use-after-free in VEPA multicast source pruning
In the Linux kernel, the following vulnerability has been resolved: ixgbevf: fix use-after-free in VEPA multicast source pruning ixgbevf_clean_rx_irq() prunes frames whose source MAC matches the VF's own address (VEPA multicast workaround) by freeing the skb and continuing to the next descriptor: dev_kfree_skb_irq(skb); continue; The skb pointer is declared outside the while loop and persists across iterations. Because the continue skips the "skb = NULL" reset at the bottom of the loop, the next iteration enters the "else if (skb)" path and calls ixgbevf_add_rx_frag() on the freed skb, dereferencing skb_shinfo(skb)->nr_frags - a use-after-free in NAPI softirq context. The sibling driver iavf already handles this correctly by nulling the pointer before continuing. Apply the same pattern here. I do not have ixgbevf hardware; the bug was found by static analysis (scan_drop_continue_loops.py + semgrep drop_continue_in_loop, multi-tool corroboration with the highest score in the scan). The UAF was confirmed under KASAN by loading a test module that reproduces the exact code pattern (alloc skb, kfree_skb, then read skb_shinfo(skb)->nr_frags): BUG: KASAN: slab-use-after-free in ixgbevf_uaf_test_init+0x100/0x1000 Read of size 8 at addr 000000006163ae78 by task insmod/30 freed 208-byte region [000000006163adc0, 000000006163ae90) QEMU emulates igb (82576) but not ixgbe (82599), and the igbvf VF driver does not include the VEPA source pruning path, so a full end-to-end reproduction with
CVE-2026-64113
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64113
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "3d931ac62411a7e43b85dba5fe45e1a4a91bd5cb",
"versionType": "git"
},
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "6ef30384a50a50e4a484cddf341bc27de31aa3de",
"versionType": "git"
},
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "55b3e91d62b2f7a24109b2d7c9f4c66d2e3b1ec1",
"versionType": "git"
},
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "add70e2682c0ad3be2a5810bcf1bc13963ba4df9",
"versionType": "git"
},
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "a244395d8c563ed1bb26c3ef708db6aeeaa08084",
"versionType": "git"
},
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "dfef79e09ed2f5df975c98547f97f5d7f8982a24",
"versionType": "git"
},
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "e8768bcbe5cd30c4ea36a22022c9ffaa66903693",
"versionType": "git"
},
{
"status": "affected",
"version": "bad17234ba702a50aeec50ab04724ee58af89607",
"lessThan": "5d49b568c188dc77199d8d2b959c91da8cc27cf1",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.142",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.92",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64113
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40956 · Revision 1
- Added to Heist Feed
- Publisher date