In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Fix slab-use-after-free read in sg_release() Fix a use-after-free bug in sg_release(), detected by syzbot with KASAN: BUG: KASAN: slab-use-after-free in lock_release+0x151/0xa30 kernel/locking/lockdep.c:5838 __mutex_unlock_slowpath+0xe2/0x750 kernel/locking/mutex.c:912 sg_release+0x1f4/0x2e0 drivers/scsi/sg.c:407 In sg_release(), the function kref_put(&sfp->f_ref, sg_remove_sfp) is called before releasing the open_rel_lock mutex. The kref_put() call may decrement the reference count of sfp to zero, triggering its cleanup through sg_remove_sfp(). This cleanup includes scheduling deferred work via sg_remove_sfp_usercontext(), which ultimately frees sfp. After kref_put(), sg_release() continues to unlock open_rel_lock and may reference sfp or sdp. If sfp has already been freed, this results in a slab-use-after-free error. Move the kref_put(&sfp->f_ref, sg_remove_sfp) call after unlocking the open_rel_lock mutex. This ensures: - No references to sfp or sdp occur after the reference count is decremented. - Cleanup functions such as sg_remove_sfp() and sg_remove_sfp_usercontext() can safely execute without impacting the mutex handling in sg_release(). The fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures proper sequencing of resource cleanup and mutex operations, eliminating the risk of use-after-free errors in sg_release().
In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Fix slab-use-after-free read in sg_release() Fix a use-after-free bug in sg_release(), detected by syzbot with KASAN: BUG: KASAN: slab-use-after-free in lock_release+0x151/0xa30 kernel/locking/lockdep.c:5838 __mutex_unlock_slowpath+0xe2/0x750 kernel/locking/mutex.c:912 sg_release+0x1f4/0x2e0 drivers/scsi/sg.c:407 In sg_release(), the function kref_put(&sfp->f_ref, sg_remove_sfp) is called before releasing the open_rel_lock mutex. The kref_put() call may decrement the reference count of sfp to zero, triggering its cleanup through sg_remove_sfp(). This cleanup includes scheduling deferred work via sg_remove_sfp_usercontext(), which ultimately frees sfp. After kref_put(), sg_release() continues to unlock open_rel_lock and may reference sfp or sdp. If sfp has already been freed, this results in a slab-use-after-free error. Move the kref_put(&sfp->f_ref, sg_remove_sfp) call after unlocking the open_rel_lock mutex. This ensures: - No references to sfp or sdp occur after the reference count is decremented. - Cleanup functions such as sg_remove_sfp() and sg_remove_sfp_usercontext() can safely execute without impacting the mutex handling in sg_release(). The fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures proper sequencing of resource cleanup and mutex operations, eliminating the risk of use-after-free errors in sg_release().
Update Linux/Linux to e19acb1926c4a1f30ee1ec84d8afba2d975bd534; Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP to *; Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP to *; Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to *; Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFP to * if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanscsi: sg: Fix slab-use-after-free read in sg_release() affects Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic), Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (generic). Severity is high. In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Fix slab-use-after-free read in sg_release() Fix a use-after-free bug in sg_release(), detected by syzbot with KASAN: BUG: KASAN: slab-use-after-free in lock_release+0x151/0xa30 kernel/locking/lockdep.c:5838 __mutex_unlock_slowpath+0xe2/0x750 kernel/locking/mutex.c:912 sg_release+0x1f4/0x2e0 drivers/scsi/sg.c:407 In sg_release(), the function kref_put(&sfp->f_ref, sg_remove_sfp) is called before releasing the open_rel_lock mutex. The kref_put() call may decrement the reference count of sfp to zero, triggering its cleanup through sg_remove_sfp(). This cleanup includes scheduling deferred work via sg_remove_sfp_usercontext(), which ultimately frees sfp. After kref_put(), sg_release() continues to unlock open_rel_lock and may reference sfp or sdp. If sfp has already been freed, this results in a slab-use-after-free error. Move the kref_put(&sfp->f_ref, sg_remove_sfp) call after unlocking the open_rel_lock mutex. This ensures: - No references to sfp or sdp occur after the reference count is decremented. - Cleanup functions such as sg_remove_sfp() and sg_remove_sfp_usercontext() can safely execute without impacting the mutex handling in sg_release(). The fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures proper sequencing of resource cleanup and mutex operations, eliminating the risk of use-after-free errors in sg_release().
AI coding agents often install or upgrade packages automatically in generic. A high vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <e19acb1926c4a1f30ee1ec84d8afba2d975bd534 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <285ce1f89f8d414e7eecab5ef5118cd512596318 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <198b89dd5a595ee3f96e5ce5c448b0484cd0e53c || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <275b8347e21ab8193e93223a8394a806e4ba8918 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <59b30afa578637169e2819536bb66459fdddc39d || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <1f5e2f1ca5875728fcf62bc1a054707444ab4960 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <f10593ad9bc36921f623361c9e3dd96bd52d85ee || 3a27c0defb0315760100f8b1adc7c4acbe04c884 || >=3.16.85 <3.17 | e19acb1926c4a1f30ee1ec84d8afba2d975bd534, 285ce1f89f8d414e7eecab5ef5118cd512596318, 198b89dd5a595ee3f96e5ce5c448b0484cd0e53c, 275b8347e21ab8193e93223a8394a806e4ba8918, 59b30afa578637169e2819536bb66459fdddc39d, 1f5e2f1ca5875728fcf62bc1a054707444ab4960, f10593ad9bc36921f623361c9e3dd96bd52d85ee, 3.17 |
| Linux/Linuxgeneric | 3.17 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Reported by CVE List V5 (cvelist).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL GuardUpdate Linux/Linux to e19acb1926c4a1f30ee1ec84d8afba2d975bd534; Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP to *; Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP to *; Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to *; Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFP to * if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanscsi: sg: Fix slab-use-after-free read in sg_release() affects Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic), Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (generic). Severity is high. In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Fix slab-use-after-free read in sg_release() Fix a use-after-free bug in sg_release(), detected by syzbot with KASAN: BUG: KASAN: slab-use-after-free in lock_release+0x151/0xa30 kernel/locking/lockdep.c:5838 __mutex_unlock_slowpath+0xe2/0x750 kernel/locking/mutex.c:912 sg_release+0x1f4/0x2e0 drivers/scsi/sg.c:407 In sg_release(), the function kref_put(&sfp->f_ref, sg_remove_sfp) is called before releasing the open_rel_lock mutex. The kref_put() call may decrement the reference count of sfp to zero, triggering its cleanup through sg_remove_sfp(). This cleanup includes scheduling deferred work via sg_remove_sfp_usercontext(), which ultimately frees sfp. After kref_put(), sg_release() continues to unlock open_rel_lock and may reference sfp or sdp. If sfp has already been freed, this results in a slab-use-after-free error. Move the kref_put(&sfp->f_ref, sg_remove_sfp) call after unlocking the open_rel_lock mutex. This ensures: - No references to sfp or sdp occur after the reference count is decremented. - Cleanup functions such as sg_remove_sfp() and sg_remove_sfp_usercontext() can safely execute without impacting the mutex handling in sg_release(). The fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures proper sequencing of resource cleanup and mutex operations, eliminating the risk of use-after-free errors in sg_release().
AI coding agents often install or upgrade packages automatically in generic. A high vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <e19acb1926c4a1f30ee1ec84d8afba2d975bd534 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <285ce1f89f8d414e7eecab5ef5118cd512596318 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <198b89dd5a595ee3f96e5ce5c448b0484cd0e53c || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <275b8347e21ab8193e93223a8394a806e4ba8918 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <59b30afa578637169e2819536bb66459fdddc39d || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <1f5e2f1ca5875728fcf62bc1a054707444ab4960 || >=cc833acbee9db5ca8c6162b015b4c93863c6f821 <f10593ad9bc36921f623361c9e3dd96bd52d85ee || 3a27c0defb0315760100f8b1adc7c4acbe04c884 || >=3.16.85 <3.17 | e19acb1926c4a1f30ee1ec84d8afba2d975bd534, 285ce1f89f8d414e7eecab5ef5118cd512596318, 198b89dd5a595ee3f96e5ce5c448b0484cd0e53c, 275b8347e21ab8193e93223a8394a806e4ba8918, 59b30afa578637169e2819536bb66459fdddc39d, 1f5e2f1ca5875728fcf62bc1a054707444ab4960, f10593ad9bc36921f623361c9e3dd96bd52d85ee, 3.17 |
| Linux/Linuxgeneric | 3.17 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Reported by CVE List V5 (cvelist).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric |
|---|
| >=0 <* |
| * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
|---|
Fixed versions are reported by the source feed; confirm compatibility before updating.
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric |
|---|
| >=0 <* |
| * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
|---|
Fixed versions are reported by the source feed; confirm compatibility before updating.