{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-47302", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47302", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-05-21T14:35:23.369Z", "updatedAt": "2026-05-11T13:51:51.778Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "igc: Fix use-after-free error during reset", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nigc: Fix use-after-free error during reset\n\nCleans the next descriptor to watch (next_to_watch) when cleaning the\nTX ring.\n\nFailure to do so can cause invalid memory accesses. If igc_poll() runs\nwhile the controller is being reset this can lead to the driver try to\nfree a skb that was already freed.\n\nLog message:\n\n [ 101.525242] refcount_t: underflow; use-after-free.\n [ 101.525251] WARNING: CPU: 1 PID: 646 at lib/refcount.c:28 refcount_warn_saturate+0xab/0xf0\n [ 101.525259] Modules linked in: sch_etf(E) sch_mqprio(E) rfkill(E) intel_rapl_msr(E) intel_rapl_common(E)\n x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) binfmt_misc(E) kvm_intel(E) kvm(E) irqbypass(E) crc32_pclmul(E)\n ghash_clmulni_intel(E) aesni_intel(E) mei_wdt(E) libaes(E) crypto_simd(E) cryptd(E) glue_helper(E) snd_hda_codec_hdmi(E)\n rapl(E) intel_cstate(E) snd_hda_intel(E) snd_intel_dspcfg(E) sg(E) soundwire_intel(E) intel_uncore(E) at24(E)\n soundwire_generic_allocation(E) iTCO_wdt(E) soundwire_cadence(E) intel_pmc_bxt(E) serio_raw(E) snd_hda_codec(E)\n iTCO_vendor_support(E) watchdog(E) snd_hda_core(E) snd_hwdep(E) snd_soc_core(E) snd_compress(E) snd_pcsp(E)\n soundwire_bus(E) snd_pcm(E) evdev(E) snd_timer(E) mei_me(E) snd(E) soundcore(E) mei(E) configfs(E) ip_tables(E) x_tables(E)\n autofs4(E) ext4(E) crc32c_generic(E) crc16(E) mbcache(E) jbd2(E) sd_mod(E) t10_pi(E) crc_t10dif(E) crct10dif_generic(E)\n i915(E) ahci(E) libahci(E) ehci_pci(E) igb(E) xhci_pci(E) ehci_hcd(E)\n [ 101.525303] drm_kms_helper(E) dca(E) xhci_hcd(E) libata(E) crct10dif_pclmul(E) cec(E) crct10dif_common(E) tsn(E) igc(E)\n e1000e(E) ptp(E) i2c_i801(E) crc32c_intel(E) psmouse(E) i2c_algo_bit(E) i2c_smbus(E) scsi_mod(E) lpc_ich(E) pps_core(E)\n usbcore(E) drm(E) button(E) video(E)\n [ 101.525318] CPU: 1 PID: 646 Comm: irq/37-enp7s0-T Tainted: G E 5.10.30-rt37-tsn1-rt-ipipe #ipipe\n [ 101.525320] Hardware name: SIEMENS AG SIMATIC IPC427D/A5E31233588, BIOS V17.02.09 03/31/2017\n [ 101.525322] RIP: 0010:refcount_warn_saturate+0xab/0xf0\n [ 101.525325] Code: 05 31 48 44 01 01 e8 f0 c6 42 00 0f 0b c3 80 3d 1f 48 44 01 00 75 90 48 c7 c7 78 a8 f3 a6 c6 05 0f 48\n 44 01 01 e8 d1 c6 42 00 <0f> 0b c3 80 3d fe 47 44 01 00 0f 85 6d ff ff ff 48 c7 c7 d0 a8 f3\n [ 101.525327] RSP: 0018:ffffbdedc0917cb8 EFLAGS: 00010286\n [ 101.525329] RAX: 0000000000000000 RBX: ffff98fd6becbf40 RCX: 0000000000000001\n [ 101.525330] RDX: 0000000000000001 RSI: ffffffffa6f2700c RDI: 00000000ffffffff\n [ 101.525332] RBP: ffff98fd6becc14c R08: ffffffffa7463d00 R09: ffffbdedc0917c50\n [ 101.525333] R10: ffffffffa74c3578 R11: 0000000000000034 R12: 00000000ffffff00\n [ 101.525335] R13: ffff98fd6b0b1000 R14: 0000000000000039 R15: ffff98fd6be35c40\n [ 101.525337] FS: 0000000000000000(0000) GS:ffff98fd6e240000(0000) knlGS:0000000000000000\n [ 101.525339] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n [ 101.525341] CR2: 00007f34135a3a70 CR3: 0000000150210003 CR4: 00000000001706e0\n [ 101.525343] Call Trace:\n [ 101.525346] sock_wfree+0x9c/0xa0\n [ 101.525353] unix_destruct_scm+0x7b/0xa0\n [ 101.525358] skb_release_head_state+0x40/0x90\n [ 101.525362] skb_release_all+0xe/0x30\n [ 101.525364] napi_consume_skb+0x57/0x160\n [ 101.525367] igc_poll+0xb7/0xc80 [igc]\n [ 101.525376] ? sched_clock+0x5/0x10\n [ 101.525381] ? sched_clock_cpu+0xe/0x100\n [ 101.525385] net_rx_action+0x14c/0x410\n [ 101.525388] __do_softirq+0xe9/0x2f4\n [ 101.525391] __local_bh_enable_ip+0xe3/0x110\n [ 101.525395] ? irq_finalize_oneshot.part.47+0xe0/0xe0\n [ 101.525398] irq_forced_thread_fn+0x6a/0x80\n [ 101.525401] irq_thread+0xe8/0x180\n [ 101.525403] ? wake_threads_waitq+0x30/0x30\n [ 101.525406] ? irq_thread_check_affinity+0xd0/0xd0\n [ 101.525408] kthread+0x183/0x1a0\n [ 101.525412] ? kthread_park+0x80/0x80\n [ 101.525415] ret_from_fork+0x22/0x30", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "13b5b7fd6a4a96dffe604f25e7b64cfbd9520924", "status": "affected", "versionType": "git", "lessThan": "a9508e0edfe369ac95d0825bcdca976436ce780f" }, { "version": "13b5b7fd6a4a96dffe604f25e7b64cfbd9520924", "status": "affected", "versionType": "git", "lessThan": "e15f629036bac005fc758b4ad17896cf2312add4" }, { "version": "13b5b7fd6a4a96dffe604f25e7b64cfbd9520924", "status": "affected", "versionType": "git", "lessThan": "ea5e36b7367ea0a36ef73a163768f16d2977bd83" }, { "version": "13b5b7fd6a4a96dffe604f25e7b64cfbd9520924", "status": "affected", "versionType": "git", "lessThan": "56ea7ed103b46970e171eb1c95916f393d64eeff" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.20", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.20" }, { "version": "5.4.136", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.54", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.13.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.13.*" }, { "version": "5.14", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }