CVE-2024-35887

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As a result,\nthe use-after-free bugs could happen, one of the scenarios\nis shown below:\n\n (Thread 1) | (Thread 2)\n | ax25_ds_timeout()\nax25_dev_device_down() |\n ax25_ds_del_timer() |\n del_timer() |\n ax25_dev_put() //FREE |\n | ax25_dev-> //USE\n\nIn order to mitigate bugs, when the device is detaching, use\ntimer_shutdown_sync() to stop the timer."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - The DAMA slave timer that is used after free is armed and repeatedly re-armed solely by frames from a remote AX.25 peer (SABM with the DAMA bit at net/ax25/ax25_in.c:407, and DAMA polls via ax25_ds_enquiry_response() \u2192 mod_timer()), reached over a point-to-point RF link or bpqether on the local Ethernet segment.\nAC:L - The attacker fully controls the racing side \u2014 keeping a DAMA-slave link up makes ax25_ds_timeout() fire every second and lets the attacker drive mod_timer() from the RX softirq at frame rate, so the window against ax25_dev_device_down()'s non-synchronous del_timer() can be hammered until it is hit, and a single re-arm after the free leaves an armed timer in freed memory.\nPR:N - AX.25 has no authentication whatsoever \u2014 the attacker only needs to transmit frames to a listening AX.25 port to turn on DAMA slave mode and arm the device timer; no account or credential on the target is involved.\nUI:N - No victim action on attacker-supplied content is needed; the free is triggered by a routine port/interface teardown (script-driven port cycling, TNC/serial or bpqether underlying device going down, module unload) while the attacker-maintained timer is active.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed ax25_dev is a kfree'd slab object that can be reallocated and read back through the still-live timer handler, and the surviving armed timer_list gives an attacker-influenced read of freed/reallocated memory usable for kernel address and data disclosure.\nI:H - mod_timer() on the freed object writes into reallocated memory, and the timer core later loads and calls ->function from the freed ax25_dev, yielding a heap-spray-based control-flow hijack primitive and arbitrary kernel memory modification.\nA:H - Even unexploited, dereferencing and re-arming a timer embedded in freed memory reliably causes slab corruption, list corruption, and kernel oops/panic, taking the system down."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ax25/ax25_dev.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "28f2d36ac52225a13e020c2589833f1816a0cfc6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "74204bf9050f7627aead9875fe4e07ba125cb19b", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c6a368f9c7af4c14b14d390c2543af8001c9bdb9", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fd819ad3ecf6f3c232a06b27423ce9ed8c20da89", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ax25/ax25_dev.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.26", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.5", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.26"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.8.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/28f2d36ac52225a13e020c2589833f1816a0cfc6"}, {"url": "https://git.kernel.org/stable/c/8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf"}, {"url": "https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b"}, {"url": "https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9"}, {"url": "https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89"}], "title": "ax25: fix use-after-free bugs caused by ax25_ds_del_timer", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-35887", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-05-29T18:31:26.964668Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:34:13.609Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:48.634Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89", "tags": ["x_transferred"]}]}]}}

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no account or credential on the target is involved.\nUI:N - No victim action on attacker-supplied content is needed; the free is triggered by a routine port/interface teardown (script-driven port cycling, TNC/serial or bpqether underlying device going down, module unload) while the attacker-maintained timer is active.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed ax25_dev is a kfree'd slab object that can be reallocated and read back through the still-live timer handler, and the surviving armed timer_list gives an attacker-influenced read of freed/reallocated memory usable for kernel address and data disclosure.\nI:H - mod_timer() on the freed object writes into reallocated memory, and the timer core later loads and calls ->function from the freed ax25_dev, yielding a heap-spray-based control-flow hijack primitive and arbitrary kernel memory modification.\nA:H - Even unexploited, dereferencing and re-arming a timer embedded in freed memory reliably causes slab corruption, list corruption, and kernel oops/panic, taking the system down."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "28f2d36ac52225a13e020c2589833f1816a0cfc6", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "74204bf9050f7627aead9875fe4e07ba125cb19b", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c6a368f9c7af4c14b14d390c2543af8001c9bdb9", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fd819ad3ecf6f3c232a06b27423ce9ed8c20da89", "versionType": "git"}], "programFiles": ["net/ax25/ax25_dev.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.26", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.8.5", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ax25/ax25_dev.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/28f2d36ac52225a13e020c2589833f1816a0cfc6"}, {"url": "https://git.kernel.org/stable/c/8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf"}, {"url": "https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b"}, {"url": "https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9"}, {"url": "https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nax25: fix use-after-free bugs caused by ax25_ds_del_timer\n\nWhen the ax25 device is detaching, the ax25_dev_device_down()\ncalls ax25_ds_del_timer() to cleanup the slave_timer. When\nthe timer handler is running, the ax25_ds_del_timer() that\ncalls del_timer() in it will return directly. As a result,\nthe use-after-free bugs could happen, one of the scenarios\nis shown below:\n\n (Thread 1) | (Thread 2)\n | ax25_ds_timeout()\nax25_dev_device_down() |\n ax25_ds_del_timer() |\n del_timer() |\n ax25_dev_put() //FREE |\n | ax25_dev-> //USE\n\nIn order to mitigate bugs, when the device is detaching, use\ntimer_shutdown_sync() to stop the timer."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.221", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.188", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.26", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8.5", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.9", "versionStartIncluding": "2.6.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-14T11:57:42.938Z"}}}, "cveMetadata": {"cveId": "CVE-2024-35887", "state": "PUBLISHED", "dateUpdated": "2026-09-14T11:57:42.938Z", "dateReserved": "2024-05-17T13:50:33.112Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-19T08:34:43.507Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ax25/ax25_dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "28f2d36ac52225a13e020c2589833f1816a0cfc6", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "74204bf9050f7627aead9875fe4e07ba125cb19b", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "c6a368f9c7af4c14b14d390c2543af8001c9bdb9", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "fd819ad3ecf6f3c232a06b27423ce9ed8c20da89", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ax25/ax25_dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"lessThan": "2.6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.26", "versionType": "semver"}, {"lessThanOrEqual": "6.8.*", "status": "unaffected", "version": "6.8.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "95B2CDA7-A612-4844-B30F-50D25134CB5F", "versionEndExcluding": "6.6.26", "versionStartIncluding": "2.6.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "DBD6C99E-4250-4DFE-8447-FF2075939D10", "versionEndExcluding": "6.8.5", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*", "matchCriteriaId": "22BEDD49-2C6D-402D-9DBF-6646F6ECD10B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*", "matchCriteriaId": "DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nax25: fix use-after-free bugs caused by ax25_ds_del_timer\n\nWhen the ax25 device is detaching, the ax25_dev_device_down()\ncalls ax25_ds_del_timer() to cleanup the slave_timer. When\nthe timer handler is running, the ax25_ds_del_timer() that\ncalls del_timer() in it will return directly. As a result,\nthe use-after-free bugs could happen, one of the scenarios\nis shown below:\n\n (Thread 1) | (Thread 2)\n | ax25_ds_timeout()\nax25_dev_device_down() |\n ax25_ds_del_timer() |\n del_timer() |\n ax25_dev_put() //FREE |\n | ax25_dev-> //USE\n\nIn order to mitigate bugs, when the device is detaching, use\ntimer_shutdown_sync() to stop the timer."}, {"lang": "es", "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ax25: corrige errores de use after free causados por ax25_ds_del_timer Cuando el dispositivo ax25 se est\u00e1 desconectando, ax25_dev_device_down() llama a ax25_ds_del_timer() para limpiar el Slave_timer. Cuando el controlador del temporizador se est\u00e1 ejecutando, el ax25_ds_del_timer() que llama a del_timer() regresar\u00e1 directamente. Como resultado, podr\u00edan ocurrir errores de uso despu\u00e9s de la liberaci\u00f3n, uno de los escenarios se muestra a continuaci\u00f3n: (Subproceso 1) | (Hilo 2) | ax25_ds_timeout() ax25_dev_device_down() | ax25_ds_del_timer() | del_timer() | ax25_dev_put() //GRATIS | | ax25_dev-> //USE Para mitigar errores, cuando el dispositivo se est\u00e9 desconectando, use timer_shutdown_sync() para detener el temporizador."}], "id": "CVE-2024-35887", "lastModified": "2026-09-14T12:17:33.070", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-35887", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-05-29T18:31:26.964668Z", "version": "2.0.3"}}]}, "published": "2024-05-19T09:15:09.837", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/28f2d36ac52225a13e020c2589833f1816a0cfc6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ax25: fix use-after-free bugs caused by ax25_ds_del_timer", "id": "2281695", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281695"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nax25: fix use-after-free bugs caused by ax25_ds_del_timer\nWhen the ax25 device is detaching, the ax25_dev_device_down()\ncalls ax25_ds_del_timer() to cleanup the slave_timer. When\nthe timer handler is running, the ax25_ds_del_timer() that\ncalls del_timer() in it will return directly. As a result,\nthe use-after-free bugs could happen, one of the scenarios\nis shown below:\n(Thread 1) | (Thread 2)\n| ax25_ds_timeout()\nax25_dev_device_down() |\nax25_ds_del_timer() |\ndel_timer() |\nax25_dev_put() //FREE |\n| ax25_dev-> //USE\nIn order to mitigate bugs, when the device is detaching, use\ntimer_shutdown_sync() to stop the timer."], "name": "CVE-2024-35887", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35887\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35887\nhttps://lore.kernel.org/linux-cve-announce/2024051947-CVE-2024-35887-9c08@gregkh/T"], "threat_severity": "Moderate"}

{}