CVE-2026-64110: igc: fix potential skb leak in igc_fpe_xmit_smd_frame()
Greg Kroah-Hartman <[email protected]>
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026071922-CVE-2026-64110-4d45@gregkh> |
From: Greg Kroah-Hartman <[email protected]> Description =========== In the Linux kernel, the following vulnerability has been resolved: igc: fix potential skb leak in igc_fpe_xmit_smd_frame() When igc_fpe_init_tx_descriptor() fails, no one takes care of an allocated skb, leaking it. [1] Use dev_kfree_skb_any() on failure. Tested on an I226 adapter with the following command, while injecting faults in igc_fpe_init_tx_descriptor() to trigger the error path. # ethtool --set-mm $DEV verify-enabled on tx-enabled on pmac-enabled on [1] unreferenced object 0xffff888113c6cdc0 (size 224): ... backtrace (crc be3d3fda): kmem_cache_alloc_node_noprof+0x3b1/0x410 __alloc_skb+0xde/0x830 igc_fpe_xmit_smd_frame.isra.0+0xad/0x1b0 igc_fpe_send_mpacket+0x37/0x90 ethtool_mmsv_verify_timer+0x15e/0x300 The Linux kernel CVE team has assigned CVE-2026-64110 to this issue. Affected and fixed versions =========================== Issue introduced in 6.16 with commit 5422570c0010bb968738f9256eb2bf83e79b4d63 and fixed in 6.18.34 with commit f1bafd35f11b3aca1c7bb38da173b8787364a04c Issue introduced in 6.16 with commit 5422570c0010bb968738f9256eb2bf83e79b4d63 and fixed in 7.0.11 with commit 3ebf056556138e74c640e6dc2b3848abd398b460 Issue introduced in 6.16 with commit 5422570c0010bb968738f9256eb2bf83e79b4d63 and fixed in 7.1 with commit e935c37b8a94bb256fada6395a5d05e1c0c6bdaf Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-64110 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/net/ethernet/intel/igc/igc_tsn.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/f1bafd35f11b3aca1c7bb38da173b8787364a04c https://git.kernel.org/stable/c/3ebf056556138e74c640e6dc2b3848abd398b460 https://git.kernel.org/stable/c/e935c37b8a94bb256fada6395a5d05e1c0c6bdaf